//
// class.cs: Class and Struct handlers
//
// Authors: Miguel de Icaza (miguel@gnu.org)
// Martin Baulig (martin@ximian.com)
// Marek Safar (marek.safar@seznam.cz)
//
// Dual licensed under the terms of the MIT X11 or GNU GPL
//
// Copyright 2001, 2002, 2003 Ximian, Inc (http://www.ximian.com)
// Copyright 2004-2008 Novell, Inc
//
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Text;
#if BOOTSTRAP_WITH_OLDLIB || NET_2_1
using XmlElement = System.Object;
#else
using System.Xml;
#endif
using Mono.CompilerServices.SymbolWriter;
namespace Mono.CSharp {
public enum Kind {
Root,
Struct,
Class,
Interface,
Enum,
Delegate
}
/// <summary>
/// This is the base class for structs and classes.
/// </summary>
public abstract class TypeContainer : DeclSpace, IMemberContainer {
public class MemberCoreArrayList: ArrayList
{
/// <summary>
/// Defines the MemberCore objects that are in this array
/// </summary>
public virtual void DefineContainerMembers ()
{
foreach (MemberCore mc in this) {
try {
mc.Define ();
} catch (Exception e) {
throw new InternalErrorException (mc, e);
}
}
}
public virtual void Emit ()
{
foreach (MemberCore mc in this)
mc.Emit ();
}
}
public class OperatorArrayList: MemberCoreArrayList
{
TypeContainer container;
public OperatorArrayList (TypeContainer container)
{
this.container = container;
}
//
// Checks that some operators come in pairs:
// == and !=
// > and <
// >= and <=
// true and false
//
// They are matched based on the return type and the argument types
//
void CheckPairedOperators ()
{
bool has_equality_or_inequality = false;
Operator[] operators = (Operator[]) ToArray (typeof (Operator));
bool [] has_pair = new bool [operators.Length];
for (int i = 0; i < Count; ++i) {
if (operators [i] == null)
continue;
Operator o_a = operators [i];
Operator.OpType o_type = o_a.OperatorType;
if (o_type == Operator.OpType.Equality || o_type == Operator.OpType.Inequality)
has_equality_or_inequality = true;
Operator.OpType matching_type = o_a.GetMatchingOperator ();
if (matching_type == Operator.OpType.TOP) {
operators [i] = null;
continue;
}
for (int ii = 0; ii < Count; ++ii) {
Operator o_b = operators [ii];
if (o_b == null || o_b.OperatorType != matching_type)
continue;
if (!TypeManager.IsEqual (o_a.ReturnType, o_b.ReturnType))
continue;
if (!TypeManager.IsEqual (o_a.ParameterTypes, o_b.ParameterTypes))
continue;
operators [i] = null;
//
// Used to ignore duplicate user conversions
//
has_pair [ii] = true;
}
}
for (int i = 0; i < Count; ++i) {
if (operators [i] == null || has_pair [i])
continue;
Operator o = operators [i];
container.Report.Error (216, o.Location,
"The operator `{0}' requires a matching operator `{1}' to also be defined",
o.GetSignatureForError (), Operator.GetName (o.GetMatchingOperator ()));
}
if (has_equality_or_inequality && container.Report.WarningLevel > 2) {
if (container.Methods == null || !container.HasEquals)
container.Report.Warning (660, 2, container.Location, "`{0}' defines operator == or operator != but does not override Object.Equals(object o)", container.GetSignatureForError ());
if (container.Methods == null || !container.HasGetHashCode)
container.Report.Warning (661, 2, container.Location, "`{0}' defines operator == or operator != but does not override Object.GetHashCode()", container.GetSignatureForError ());
}
}
public override void DefineContainerMembers ()
{
base.DefineContainerMembers ();
CheckPairedOperators ();
}
}
//
// Different context is needed when resolving type container base
// types. Type names come from the parent scope but type parameter
// names from the container scope.
//
struct BaseContext : IMemberContext
{
TypeContainer tc;
public BaseContext (TypeContainer tc)
{
this.tc = tc;
}
#region IMemberContext Members
public CompilerContext Compiler {
get { return tc.Compiler; }
}
public Type CurrentType {
get { return tc.Parent.CurrentType; }
}
public TypeParameter[] CurrentTypeParameters {
get { return tc.PartialContainer.CurrentTypeParameters; }
}
public TypeContainer CurrentTypeDefinition {
get { return tc.Parent.CurrentTypeDefinition; }
}
public bool IsObsolete {
get { return tc.IsObsolete; }
}
public bool IsUnsafe {
get { return tc.IsUnsafe; }
}
public bool IsStatic {
get { return tc.IsStatic; }
}
public string GetSignatureForError ()
{
throw new NotImplementedException ();
}
public ExtensionMethodGroupExpr LookupExtensionMethod (Type extensionType, string name, Location loc)
{
return null;
}
public FullNamedExpression LookupNamespaceAlias (string name)
{
return tc.Parent.LookupNamespaceAlias (name);
}
public FullNamedExpression LookupNamespaceOrType (string name, Location loc, bool ignore_cs0104)
{
TypeParameter[] tp = CurrentTypeParameters;
if (tp != null) {
TypeParameter t = TypeParameter.FindTypeParameter (tp, name);
if (t != null)
return new TypeParameterExpr (t, loc);
}
return tc.Parent.LookupNamespaceOrType (name, loc, ignore_cs0104);
}
#endregion
}
[Flags]
enum CachedMethods
{
Equals = 1,
GetHashCode = 1 << 1,
HasStaticFieldInitializer = 1 << 2
}
// Whether this is a struct, class or interface
public readonly Kind Kind;
// Holds a list of classes and structures
protected ArrayList types;
MemberCoreArrayList ordered_explicit_member_list;
MemberCoreArrayList ordered_member_list;
// Holds the list of properties
MemberCoreArrayList properties;
// Holds the list of delegates
MemberCoreArrayList delegates;
// Holds the list of constructors
protected MemberCoreArrayList instance_constructors;
// Holds the list of fields
protected MemberCoreArrayList fields;
// Holds a list of fields that have initializers
protected ArrayList initialized_fields;
// Holds a list of static fields that have initializers
protected ArrayList initialized_static_fields;
// Holds the list of constants
protected MemberCoreArrayList constants;
// Holds the methods.
MemberCoreArrayList methods;
// Holds the events
protected MemberCoreArrayList events;
// Holds the indexers
ArrayList indexers;
// Holds the operators
MemberCoreArrayList operators;
// Holds the compiler generated classes
ArrayList compiler_generated;
//
// Pointers to the default constructor and the default static constructor
//
protected Constructor default_constructor;
protected Constructor default_static_constructor;
//
// Points to the first non-static field added to the container.
//
// This is an arbitrary choice. We are interested in looking at _some_ non-static field,
// and the first one's as good as any.
//
FieldBase first_nonstatic_field = null;
//
// This one is computed after we can distinguish interfaces
// from classes from the arraylist `type_bases'
//
TypeExpr base_type;
TypeExpr[] iface_exprs;
Type GenericType;
GenericTypeParameterBuilder[] nested_gen_params;
protected ArrayList type_bases;
protected bool members_defined;
bool members_defined_ok;
// The interfaces we implement.
protected Type[] ifaces;
// The base member cache and our member cache
MemberCache base_cache;
protected MemberCache member_cache;
public const string DefaultIndexerName = "Item";
private bool seen_normal_indexers = false;
private string indexer_name = DefaultIndexerName;
protected bool requires_delayed_unmanagedtype_check;
private CachedMethods cached_method;
ArrayList partial_parts;
/// <remarks>
/// The pending methods that need to be implemented
// (interfaces or abstract methods)
/// </remarks>
PendingImplementation pending;
public TypeContainer (NamespaceEntry ns, DeclSpace parent, MemberName name,
Attributes attrs, Kind kind)
: base (ns, parent, name, attrs)
{
if (parent != null && parent.NamespaceEntry != ns)
throw new InternalErrorException ("A nested type should be in the same NamespaceEntry as its enclosing class");
this.Kind = kind;
this.PartialContainer = this;
}
public bool AddMember (MemberCore symbol)
{
return AddToContainer (symbol, symbol.MemberName.Basename);
}
protected virtual bool AddMemberType (DeclSpace ds)
{
return AddToContainer (ds, ds.Basename);
}
protected virtual void RemoveMemberType (DeclSpace ds)
{
RemoveFromContainer (ds.Basename);
}
public void AddConstant (Const constant)
{
if (!AddMember (constant))
return;
if (constants == null)
constants = new MemberCoreArrayList ();
constants.Add (constant);
}
public TypeContainer AddTypeContainer (TypeContainer tc)
{
if (!AddMemberType (tc))
return tc;
if (types == null)
types = new MemberCoreArrayList ();
types.Add (tc);
return tc;
}
public virtual TypeContainer AddPartial (TypeContainer next_part)
{
return AddPartial (next_part, next_part.Basename);
}
protected TypeContainer AddPartial (TypeContainer next_part, string name)
{
next_part.ModFlags |= Modifiers.PARTIAL;
TypeContainer tc = defined_names [name] as TypeContainer;
if (tc == null)
return AddTypeContainer (next_part);
if ((tc.ModFlags & Modifiers.PARTIAL) == 0) {
Report.SymbolRelatedToPreviousError (next_part);
Error_MissingPartialModifier (tc);
}
if (tc.Kind != next_part.Kind) {
Report.SymbolRelatedToPreviousError (tc);
Report.Error (261, next_part.Location,
"Partial declarations of `{0}' must be all classes, all structs or all interfaces",
next_part.GetSignatureForError ());
}
if ((tc.ModFlags & Modifiers.Accessibility) != (next_part.ModFlags & Modifiers.Accessibility) &&
((tc.ModFlags & Modifiers.DEFAULT_ACCESS_MODIFER) == 0 &&
(next_part.ModFlags & Modifiers.DEFAULT_ACCESS_MODIFER) == 0)) {
Report.SymbolRelatedToPreviousError (tc);
Report.Error (262, next_part.Location,
"Partial declarations of `{0}' have conflicting accessibility modifiers",
next_part.GetSignatureForError ());
}
if (tc.partial_parts == null)
tc.partial_parts = new ArrayList (1);
if ((next_part.ModFlags & Modifiers.DEFAULT_ACCESS_MODIFER) != 0) {
tc.ModFlags |= next_part.ModFlags & ~(Modifiers.DEFAULT_ACCESS_MODIFER | Modifiers.Accessibility);
} else if ((tc.ModFlags & Modifiers.DEFAULT_ACCESS_MODIFER) != 0) {
tc.ModFlags &= ~(Modifiers.DEFAULT_ACCESS_MODIFER | Modifiers.Accessibility);
tc.ModFlags |= next_part.ModFlags;
} else {
tc.ModFlags |= next_part.ModFlags;
}
if (next_part.attributes != null) {
if (tc.attributes == null)
tc.attributes = next_part.attributes;
else
tc.attributes.AddAttributes (next_part.attributes.Attrs);
}
next_part.PartialContainer = tc;
tc.partial_parts.Add (next_part);
return tc;
}
public virtual void RemoveTypeContainer (TypeContainer next_part)
{
if (types != null)
types.Remove (next_part);
RemoveMemberType (next_part);
}
public void AddDelegate (Delegate d)
{
if (!AddMemberType (d))
return;
if (delegates == null)
delegates = new MemberCoreArrayList ();
delegates.Add (d);
}
private void AddMemberToList (MemberCore mc, ArrayList alist, bool isexplicit)
{
if (ordered_explicit_member_list == null) {
ordered_explicit_member_list = new MemberCoreArrayList ();
ordered_member_list = new MemberCoreArrayList ();
}
if (isexplicit) {
if (Kind == Kind.Interface) {
Report.Error (541, mc.Location,
"`{0}': explicit interface declaration can only be declared in a class or struct",
mc.GetSignatureForError ());
}
ordered_explicit_member_list.Add (mc);
alist.Insert (0, mc);
} else {
ordered_member_list.Add (mc);
alist.Add (mc);
}
}
public void AddMethod (MethodOrOperator method)
{
if (!AddToContainer (method, method.MemberName.Basename))
return;
if (methods == null)
methods = new MemberCoreArrayList ();
if (method.MemberName.Left != null)
AddMemberToList (method, methods, true);
else
AddMemberToList (method, methods, false);
}
public void AddConstructor (Constructor c)
{
bool is_static = (c.ModFlags & Modifiers.STATIC) != 0;
if (!AddToContainer (c, is_static ?
ConstructorBuilder.ConstructorName : ConstructorBuilder.TypeConstructorName))
return;
if (is_static && c.Parameters.IsEmpty){
if (default_static_constructor != null) {
Report.SymbolRelatedToPreviousError (default_static_constructor);
Report.Error (111, c.Location,
"A member `{0}' is already defined. Rename this member or use different parameter types",
c.GetSignatureForError ());
return;
}
default_static_constructor = c;
} else {
if (c.Parameters.IsEmpty)
default_constructor = c;
if (instance_constructors == null)
instance_constructors = new MemberCoreArrayList ();
instance_constructors.Add (c);
}
}
public bool AddField (FieldBase field)
{
if (!AddMember (field))
return false;
if (fields == null)
fields = new MemberCoreArrayList ();
fields.Add (field);
if ((field.ModFlags & Modifiers.STATIC) != 0)
return true;
if (first_nonstatic_field == null) {
first_nonstatic_field = field;
return true;
}
if (Kind == Kind.Struct && first_nonstatic_field.Parent != field.Parent) {
Report.SymbolRelatedToPreviousError (first_nonstatic_field.Parent);
Report.Warning (282, 3, field.Location,
"struct instance field `{0}' found in different declaration from instance field `{1}'",
field.GetSignatureForError (), first_nonstatic_field.GetSignatureForError ());
}
return true;
}
public void AddProperty (Property prop)
{
if (!AddMember (prop) ||
!AddMember (prop.Get) || !AddMember (prop.Set))
return;
if (properties == null)
properties = new MemberCoreArrayList ();
if (prop.MemberName.Left != null)
AddMemberToList (prop, properties, true);
else
AddMemberToList (prop, properties, false);
}
public void AddEvent (Event e)
{
if (!AddMember (e))
return;
if (e is EventProperty) {
if (!AddMember (e.Add))
return;
if (!AddMember (e.Remove))
return;
}
if (events == null)
events = new MemberCoreArrayList ();
events.Add (e);
}
/// <summary>
/// Indexer has special handling in constrast to other AddXXX because the name can be driven by IndexerNameAttribute
/// </summary>
public void AddIndexer (Indexer i)
{
if (indexers == null)
indexers = new ArrayList ();
if (i.IsExplicitImpl)
AddMemberToList (i, indexers, true);
else
AddMemberToList (i, indexers, false);
}
public void AddOperator (Operator op)
{
if (!AddMember (op))
return;
if (operators == null)
operators = new OperatorArrayList (this);
operators.Add (op);
}
public void AddCompilerGeneratedClass (CompilerGeneratedClass c)
{
Report.Debug (64, "ADD COMPILER GENERATED CLASS", this, c);
if (compiler_generated == null)
compiler_generated = new ArrayList ();
compiler_generated.Add (c);
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.DefaultMember) {
if (Indexers != null) {
Report.Error (646, a.Location, "Cannot specify the `DefaultMember' attribute on type containing an indexer");
return;
}
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override AttributeTargets AttributeTargets {
get {
throw new NotSupportedException ();
}
}
public ArrayList Types {
get {
return types;
}
}
public MemberCoreArrayList Methods {
get {
return methods;
}
}
public ArrayList Constants {
get {
return constants;
}
}
protected Type BaseType {
get {
return TypeBuilder.BaseType;
}
}
public ArrayList Fields {
get {
return fields;
}
}
public ArrayList InstanceConstructors {
get {
return instance_constructors;
}
}
public ArrayList Properties {
get {
return properties;
}
}
public ArrayList Events {
get {
return events;
}
}
public ArrayList Indexers {
get {
return indexers;
}
}
public ArrayList Operators {
get {
return operators;
}
}
public ArrayList Delegates {
get {
return delegates;
}
}
protected override TypeAttributes TypeAttr {
get {
return Modifiers.TypeAttr (ModFlags, IsTopLevel) | base.TypeAttr;
}
}
public string IndexerName {
get {
return indexers == null ? DefaultIndexerName : indexer_name;
}
}
public bool IsComImport {
get {
if (OptAttributes == null)
return false;
return OptAttributes.Contains (PredefinedAttributes.Get.ComImport);
}
}
public virtual void RegisterFieldForInitialization (MemberCore field, FieldInitializer expression)
{
if ((field.ModFlags & Modifiers.STATIC) != 0){
if (initialized_static_fields == null) {
PartialContainer.HasStaticFieldInitializer = true;
initialized_static_fields = new ArrayList (4);
}
initialized_static_fields.Add (expression);
} else {
if (initialized_fields == null)
initialized_fields = new ArrayList (4);
initialized_fields.Add (expression);
}
}
public void ResolveFieldInitializers (BlockContext ec)
{
if (partial_parts != null) {
foreach (TypeContainer part in partial_parts) {
part.DoResolveFieldInitializers (ec);
}
}
DoResolveFieldInitializers (ec);
}
void DoResolveFieldInitializers (BlockContext ec)
{
if (ec.IsStatic) {
if (initialized_static_fields == null)
return;
bool has_complex_initializer = !RootContext.Optimize;
int i;
ExpressionStatement [] init = new ExpressionStatement [initialized_static_fields.Count];
for (i = 0; i < initialized_static_fields.Count; ++i) {
FieldInitializer fi = (FieldInitializer) initialized_static_fields [i];
ExpressionStatement s = fi.ResolveStatement (ec);
if (s == null) {
s = EmptyExpressionStatement.Instance;
} else if (fi.IsComplexInitializer) {
has_complex_initializer |= true;
}
init [i] = s;
}
for (i = 0; i < initialized_static_fields.Count; ++i) {
FieldInitializer fi = (FieldInitializer) initialized_static_fields [i];
//
// Need special check to not optimize code like this
// static int a = b = 5;
// static int b = 0;
//
if (!has_complex_initializer && fi.IsDefaultInitializer)
continue;
ec.CurrentBlock.AddScopeStatement (new StatementExpression (init [i]));
}
return;
}
if (initialized_fields == null)
return;
for (int i = 0; i < initialized_fields.Count; ++i) {
FieldInitializer fi = (FieldInitializer) initialized_fields [i];
ExpressionStatement s = fi.ResolveStatement (ec);
if (s == null)
continue;
//
// Field is re-initialized to its default value => removed
//
if (fi.IsDefaultInitializer && RootContext.Optimize)
continue;
ec.CurrentBlock.AddScopeStatement (new StatementExpression (s));
}
}
public override string DocComment {
get {
return comment;
}
set {
if (value == null)
return;
comment += value;
}
}
public PendingImplementation PendingImplementations {
get { return pending; }
}
public override bool GetClsCompliantAttributeValue ()
{
if (PartialContainer != this)
return PartialContainer.GetClsCompliantAttributeValue ();
return base.GetClsCompliantAttributeValue ();
}
public virtual void AddBasesForPart (DeclSpace part, ArrayList bases)
{
// FIXME: get rid of partial_parts and store lists of bases of each part here
// assumed, not verified: 'part' is in 'partial_parts'
((TypeContainer) part).type_bases = bases;
}
/// <summary>
/// This function computes the Base class and also the
/// list of interfaces that the class or struct @c implements.
///
/// The return value is an array (might be null) of
/// interfaces implemented (as Types).
///
/// The @base_class argument is set to the base object or null
/// if this is `System.Object'.
/// </summary>
protected virtual TypeExpr[] ResolveBaseTypes (out TypeExpr base_class)
{
base_class = null;
if (type_bases == null)
return null;
int count = type_bases.Count;
TypeExpr [] ifaces = null;
IMemberContext base_context = new BaseContext (this);
for (int i = 0, j = 0; i < count; i++){
FullNamedExpression fne = (FullNamedExpression) type_bases [i];
//
// Standard ResolveAsTypeTerminal cannot be used in this case because
// it does ObsoleteAttribute and constraint checks which require
// base type to be set
//
TypeExpr fne_resolved = fne.ResolveAsBaseTerminal (base_context, false);
if (fne_resolved == null)
continue;
if (i == 0 && Kind == Kind.Class && !fne_resolved.Type.IsInterface) {
if (fne_resolved is DynamicTypeExpr)
Report.Error (1965, Location, "Class `{0}' cannot derive from the dynamic type",
GetSignatureForError ());
else
base_class = fne_resolved;
continue;
}
if (ifaces == null)
ifaces = new TypeExpr [count - i];
if (fne_resolved.Type.IsInterface) {
for (int ii = 0; ii < j; ++ii) {
if (TypeManager.IsEqual (fne_resolved.Type, ifaces [ii].Type)) {
Report.Error (528, Location, "`{0}' is already listed in interface list",
fne_resolved.GetSignatureForError ());
break;
}
}
if (Kind == Kind.Interface && !IsAccessibleAs (fne_resolved.Type)) {
Report.Error (61, fne.Location,
"Inconsistent accessibility: base interface `{0}' is less accessible than interface `{1}'",
fne_resolved.GetSignatureForError (), GetSignatureForError ());
}
} else {
Report.SymbolRelatedToPreviousError (fne_resolved.Type);
if (Kind != Kind.Class) {
Report.Error (527, fne.Location, "Type `{0}' in interface list is not an interface", fne_resolved.GetSignatureForError ());
} else if (base_class != null)
Report.Error (1721, fne.Location, "`{0}': Classes cannot have multiple base classes (`{1}' and `{2}')",
GetSignatureForError (), base_class.GetSignatureForError (), fne_resolved.GetSignatureForError ());
else {
Report.Error (1722, fne.Location, "`{0}': Base class `{1}' must be specified as first",
GetSignatureForError (), fne_resolved.GetSignatureForError ());
}
}
ifaces [j++] = fne_resolved;
}
return ifaces;
}
TypeExpr[] GetNormalPartialBases (ref TypeExpr base_class)
{
ArrayList ifaces = new ArrayList (0);
if (iface_exprs != null)
ifaces.AddRange (iface_exprs);
foreach (TypeContainer part in partial_parts) {
TypeExpr new_base_class;
TypeExpr[] new_ifaces = part.ResolveBaseTypes (out new_base_class);
if (new_base_class != TypeManager.system_object_expr) {
if (base_class == TypeManager.system_object_expr)
base_class = new_base_class;
else {
if (new_base_class != null && !TypeManager.IsEqual (new_base_class.Type, base_class.Type)) {
Report.SymbolRelatedToPreviousError (base_class.Location, "");
Report.Error (263, part.Location,
"Partial declarations of `{0}' must not specify different base classes",
part.GetSignatureForError ());
return null;
}
}
}
if (new_ifaces == null)
continue;
foreach (TypeExpr iface in new_ifaces) {
if (ifaces.Contains (iface))
continue;
ifaces.Add (iface);
}
}
if (ifaces.Count == 0)
return null;
return (TypeExpr[])ifaces.ToArray (typeof (TypeExpr));
}
bool CheckGenericInterfaces (Type[] ifaces)
{
#if GMCS_SOURCE
ArrayList already_checked = new ArrayList ();
for (int i = 0; i < ifaces.Length; i++) {
Type iface = ifaces [i];
foreach (Type t in already_checked) {
if (iface == t)
continue;
Type[] inferred = new Type [CountTypeParameters];
if (!TypeManager.MayBecomeEqualGenericInstances (iface, t, inferred, null))
continue;
Report.Error (695, Location,
"`{0}' cannot implement both `{1}' and `{2}' " +
"because they may unify for some type parameter substitutions",
TypeManager.CSharpName (TypeBuilder), TypeManager.CSharpName (iface),
TypeManager.CSharpName (t));
return false;
}
already_checked.Add (iface);
}
#endif
return true;
}
bool error = false;
bool CreateTypeBuilder ()
{
try {
Type default_parent = null;
if (Kind == Kind.Struct)
default_parent = TypeManager.value_type;
else if (Kind == Kind.Enum)
default_parent = TypeManager.enum_type;
else if (Kind == Kind.Delegate)
default_parent = TypeManager.multicast_delegate_type;
//
// Sets .size to 1 for structs with no instance fields
//
int type_size = Kind == Kind.Struct && first_nonstatic_field == null ? 1 : 0;
if (IsTopLevel){
if (GlobalRootNamespace.Instance.IsNamespace (Name)) {
Report.Error (519, Location, "`{0}' clashes with a predefined namespace", Name);
return false;
}
ModuleBuilder builder = Module.Builder;
TypeBuilder = builder.DefineType (
Name, TypeAttr, default_parent, type_size);
} else {
TypeBuilder builder = Parent.TypeBuilder;
TypeBuilder = builder.DefineNestedType (
Basename, TypeAttr, default_parent, type_size);
}
} catch (ArgumentException) {
Report.RuntimeMissingSupport (Location, "static classes");
return false;
}
TypeManager.AddUserType (this);
if (IsGeneric) {
string[] param_names = new string [TypeParameters.Length];
for (int i = 0; i < TypeParameters.Length; i++)
param_names [i] = TypeParameters [i].Name;
#if GMCS_SOURCE
GenericTypeParameterBuilder[] gen_params = TypeBuilder.DefineGenericParameters (param_names);
int offset = CountTypeParameters;
if (CurrentTypeParameters != null)
offset -= CurrentTypeParameters.Length;
if (offset > 0) {
nested_gen_params = new GenericTypeParameterBuilder [offset];
Array.Copy (gen_params, nested_gen_params, offset);
}
for (int i = offset; i < gen_params.Length; i++)
CurrentTypeParameters [i - offset].Define (gen_params [i]);
#else
nested_gen_params = null;
throw new NotSupportedException ();
#endif
}
return true;
}
bool DefineBaseTypes ()
{
iface_exprs = ResolveBaseTypes (out base_type);
if (partial_parts != null) {
iface_exprs = GetNormalPartialBases (ref base_type);
}
//
// GetClassBases calls ResolveBaseTypeExpr() on the various type expressions involved,
// which in turn should have called DefineType()s on base types if necessary.
//
// None of the code below should trigger DefineType()s on classes that we depend on.
// Thus, we are eligible to be on the topological sort `type_container_resolve_order'.
//
// Let's do it as soon as possible, since code below can call DefineType() on classes
// that depend on us to be populated before they are.
//
if (!(this is CompilerGeneratedClass) && !(this is Delegate))
RootContext.RegisterOrder (this);
if (!CheckRecursiveDefinition (this))
return false;
if (base_type != null && base_type.Type != null) {
TypeBuilder.SetParent (base_type.Type);
}
// add interfaces that were not added at type creation
if (iface_exprs != null) {
ifaces = TypeManager.ExpandInterfaces (iface_exprs);
if (ifaces == null)
return false;
foreach (Type itype in ifaces)
TypeBuilder.AddInterfaceImplementation (itype);
if (!CheckGenericInterfaces (ifaces))
return false;
TypeManager.RegisterBuilder (TypeBuilder, ifaces);
}
return true;
}
//
// Defines the type in the appropriate ModuleBuilder or TypeBuilder.
//
public TypeBuilder CreateType ()
{
if (TypeBuilder != null)
return TypeBuilder;
if (error)
return null;
if (!CreateTypeBuilder ()) {
error = true;
return null;
}
if (partial_parts != null) {
foreach (TypeContainer part in partial_parts)
part.TypeBuilder = TypeBuilder;
}
if (Types != null) {
foreach (TypeContainer tc in Types) {
if (tc.CreateType () == null) {
error = true;
return null;
}
}
}
return TypeBuilder;
}
bool type_defined;
public override TypeBuilder DefineType ()
{
if (error)
return null;
if (type_defined)
return TypeBuilder;
type_defined = true;
if (CreateType () == null) {
error = true;
return null;
}
if (!DefineBaseTypes ()) {
error = true;
return null;
}
if (!DefineNestedTypes ()) {
error = true;
return null;
}
return TypeBuilder;
}
public override void SetParameterInfo (ArrayList constraints_list)
{
base.SetParameterInfo (constraints_list);
if (!is_generic || PartialContainer == this)
return;
TypeParameter[] tc_names = PartialContainer.TypeParameters;
for (int i = 0; i < tc_names.Length; ++i) {
if (tc_names [i].Name != type_params [i].Name) {
Report.SymbolRelatedToPreviousError (PartialContainer.Location, "");
Report.Error (264, Location, "Partial declarations of `{0}' must have the same type parameter names in the same order",
GetSignatureForError ());
break;
}
}
}
void UpdateTypeParameterConstraints (TypeContainer part)
{
TypeParameter[] current_params = type_params;
for (int i = 0; i < current_params.Length; i++) {
Constraints c = part.type_params [i].Constraints;
if (c == null)
continue;
if (current_params [i].UpdateConstraints (part, c))
continue;
Report.SymbolRelatedToPreviousError (Location, "");
Report.Error (265, part.Location,
"Partial declarations of `{0}' have inconsistent constraints for type parameter `{1}'",
GetSignatureForError (), current_params [i].GetSignatureForError ());
}
}
public bool ResolveType ()
{
if (!DoResolveType ())
return false;
if (compiler_generated != null) {
foreach (CompilerGeneratedClass c in compiler_generated)
if (!c.ResolveType ())
return false;
}
return true;
}
protected virtual bool DoResolveType ()
{
if (!IsGeneric)
return true;
if (PartialContainer != this)
throw new InternalErrorException ();
TypeExpr current_type = null;
if (CurrentTypeParameters != null) {
foreach (TypeParameter type_param in CurrentTypeParameters) {
if (!type_param.Resolve (this)) {
error = true;
return false;
}
}
if (partial_parts != null) {
foreach (TypeContainer part in partial_parts)
UpdateTypeParameterConstraints (part);
}
}
for (int i = 0; i < TypeParameters.Length; ++i) {
//
// FIXME: Same should be done for delegates
// TODO: Quite ugly way how to propagate constraints to
// nested types
//
if (nested_gen_params != null && i < nested_gen_params.Length) {
TypeParameters [i].SetConstraints (nested_gen_params [i]);
} else {
if (!TypeParameters [i].DefineType (this)) {
error = true;
return false;
}
}
}
// TODO: Very strange, why not simple make generic type from
// current type parameters
current_type = new GenericTypeExpr (this, Location);
current_type = current_type.ResolveAsTypeTerminal (this, false);
if (current_type == null) {
error = true;
return false;
}
currentType = current_type.Type;
return true;
}
protected virtual bool DefineNestedTypes ()
{
if (Types != null) {
foreach (TypeContainer tc in Types)
if (tc.DefineType () == null)
return false;
}
if (Delegates != null) {
foreach (Delegate d in Delegates)
if (d.DefineType () == null)
return false;
}
return true;
}
TypeContainer InTransit;
protected bool CheckRecursiveDefinition (TypeContainer tc)
{
if (InTransit != null) {
Report.SymbolRelatedToPreviousError (this);
if (this is Interface)
Report.Error (
529, tc.Location, "Inherited interface `{0}' causes a " +
"cycle in the interface hierarchy of `{1}'",
GetSignatureForError (), tc.GetSignatureForError ());
else
Report.Error (
146, tc.Location, "Circular base class dependency " +
"involving `{0}' and `{1}'",
tc.GetSignatureForError (), GetSignatureForError ());
return false;
}
InTransit = tc;
if (base_type != null && base_type.Type != null) {
Type t = TypeManager.DropGenericTypeArguments (base_type.Type);
TypeContainer ptc = TypeManager.LookupTypeContainer (t);
if ((ptc != null) && !ptc.CheckRecursiveDefinition (this))
return false;
}
if (iface_exprs != null) {
foreach (TypeExpr iface in iface_exprs) {
Type itype = TypeManager.DropGenericTypeArguments (iface.Type);
TypeContainer ptc = TypeManager.LookupTypeContainer (itype);
if ((ptc != null) && !ptc.CheckRecursiveDefinition (this))
return false;
}
}
if (!IsTopLevel && !Parent.PartialContainer.CheckRecursiveDefinition (this))
return false;
InTransit = null;
return true;
}
public override TypeParameter[] CurrentTypeParameters {
get {
return PartialContainer.type_params;
}
}
/// <summary>
/// Populates our TypeBuilder with fields and methods
/// </summary>
public override bool Define ()
{
if (members_defined)
return members_defined_ok;
members_defined_ok = DoDefineMembers ();
members_defined = true;
return members_defined_ok;
}
protected virtual bool DoDefineMembers ()
{
if (iface_exprs != null) {
foreach (TypeExpr iface in iface_exprs) {
ObsoleteAttribute oa = AttributeTester.GetObsoleteAttribute (iface.Type);
if ((oa != null) && !IsObsolete)
AttributeTester.Report_ObsoleteMessage (
oa, iface.GetSignatureForError (), Location, Report);
GenericTypeExpr ct = iface as GenericTypeExpr;
if (ct != null) {
// TODO: passing `this' is wrong, should be base type iface instead
TypeManager.CheckTypeVariance (ct.Type, Variance.Covariant, this);
if (!ct.CheckConstraints (this))
return false;
}
}
}
if (base_type != null) {
ObsoleteAttribute obsolete_attr = AttributeTester.GetObsoleteAttribute (base_type.Type);
if (obsolete_attr != null && !IsObsolete)
AttributeTester.Report_ObsoleteMessage (obsolete_attr, base_type.GetSignatureForError (), Location, Report);
GenericTypeExpr ct = base_type as GenericTypeExpr;
if ((ct != null) && !ct.CheckConstraints (this))
return false;
TypeContainer baseContainer = TypeManager.LookupTypeContainer(base_type.Type);
if (baseContainer != null)
baseContainer.Define();
member_cache = new MemberCache (base_type.Type, this);
} else if (Kind == Kind.Interface) {
member_cache = new MemberCache (null, this);
Type [] ifaces = TypeManager.GetInterfaces (TypeBuilder);
for (int i = 0; i < ifaces.Length; ++i)
member_cache.AddInterface (TypeManager.LookupMemberCache (ifaces [i]));
} else {
member_cache = new MemberCache (null, this);
}
if (types != null)
foreach (TypeContainer tc in types)
member_cache.AddNestedType (tc);
if (delegates != null)
foreach (Delegate d in delegates)
member_cache.AddNestedType (d);
if (partial_parts != null) {
foreach (TypeContainer part in partial_parts)
part.member_cache = member_cache;
}
if (!IsTopLevel) {
MemberInfo conflict_symbol = Parent.PartialContainer.FindBaseMemberWithSameName (Basename, false);
if (conflict_symbol == null) {
if ((ModFlags & Modifiers.NEW) != 0)
Report.Warning (109, 4, Location, "The member `{0}' does not hide an inherited member. The new keyword is not required", GetSignatureForError ());
} else {
if ((ModFlags & Modifiers.NEW) == 0) {
Report.SymbolRelatedToPreviousError (conflict_symbol);
Report.Warning (108, 2, Location, "`{0}' hides inherited member `{1}'. Use the new keyword if hiding was intended",
GetSignatureForError (), TypeManager.GetFullNameSignature (conflict_symbol));
}
}
}
DefineContainerMembers (constants);
DefineContainerMembers (fields);
if (Kind == Kind.Struct || Kind == Kind.Class) {
pending = PendingImplementation.GetPendingImplementations (this);
if (requires_delayed_unmanagedtype_check) {
requires_delayed_unmanagedtype_check = false;
foreach (FieldBase f in fields) {
if (f.MemberType != null && f.MemberType.IsPointer)
TypeManager.VerifyUnManaged (f.MemberType, f.Location);
}
}
}
//
// Constructors are not in the defined_names array
//
DefineContainerMembers (instance_constructors);
DefineContainerMembers (events);
DefineContainerMembers (ordered_explicit_member_list);
DefineContainerMembers (ordered_member_list);
DefineContainerMembers (operators);
DefineContainerMembers (delegates);
ComputeIndexerName();
CheckEqualsAndGetHashCode();
if (CurrentType != null) {
GenericType = CurrentType;
}
//
// FIXME: This hack is needed because member cache does not work
// with generic types, we rely on runtime to inflate dynamic types.
// TODO: This hack requires member cache refactoring to be removed
//
if (TypeManager.IsGenericType (TypeBuilder))
member_cache = new MemberCache (this);
return true;
}
protected virtual void DefineContainerMembers (MemberCoreArrayList mcal)
{
if (mcal != null)
mcal.DefineContainerMembers ();
}
protected virtual void ComputeIndexerName ()
{
if (indexers == null)
return;
string class_indexer_name = null;
//
// If there's both an explicit and an implicit interface implementation, the
// explicit one actually implements the interface while the other one is just
// a normal indexer. See bug #37714.
//
// Invariant maintained by AddIndexer(): All explicit interface indexers precede normal indexers
foreach (Indexer i in indexers) {
if (i.InterfaceType != null) {
if (seen_normal_indexers)
throw new Exception ("Internal Error: 'Indexers' array not sorted properly.");
continue;
}
seen_normal_indexers = true;
if (class_indexer_name == null) {
class_indexer_name = i.ShortName;
continue;
}
if (i.ShortName != class_indexer_name)
Report.Error (668, i.Location, "Two indexers have different names; the IndexerName attribute must be used with the same name on every indexer within a type");
}
if (class_indexer_name != null)
indexer_name = class_indexer_name;
}
protected virtual void EmitIndexerName ()
{
if (!seen_normal_indexers)
return;
PredefinedAttribute pa = PredefinedAttributes.Get.DefaultMember;
if (pa.Constructor == null &&
!pa.ResolveConstructor (Location, TypeManager.string_type))
return;
CustomAttributeBuilder cb = new CustomAttributeBuilder (pa.Constructor, new string [] { IndexerName });
TypeBuilder.SetCustomAttribute (cb);
}
protected virtual void CheckEqualsAndGetHashCode ()
{
if (methods == null)
return;
if (HasEquals && !HasGetHashCode) {
Report.Warning (659, 3, this.Location, "`{0}' overrides Object.Equals(object) but does not override Object.GetHashCode()", this.GetSignatureForError ());
}
}
public MemberInfo FindBaseMemberWithSameName (string name, bool ignore_methods)
{
return BaseCache == null ? null : BaseCache.FindMemberWithSameName (name, ignore_methods, null);
}
/// <summary>
/// This function is based by a delegate to the FindMembers routine
/// </summary>
static bool AlwaysAccept (MemberInfo m, object filterCriteria)
{
return true;
}
/// <summary>
/// This filter is used by FindMembers, and we just keep
/// a global for the filter to `AlwaysAccept'
/// </summary>
static MemberFilter accepting_filter;
static TypeContainer ()
{
accepting_filter = new MemberFilter (AlwaysAccept);
}
public MethodInfo[] GetMethods ()
{
ArrayList members = new ArrayList ();
Define ();
if (methods != null) {
int len = methods.Count;
for (int i = 0; i < len; i++) {
Method m = (Method) methods [i];
members.Add (m.MethodBuilder);
}
}
if (operators != null) {
int len = operators.Count;
for (int i = 0; i < len; i++) {
Operator o = (Operator) operators [i];
members.Add (o.MethodBuilder);
}
}
if (properties != null) {
int len = properties.Count;
for (int i = 0; i < len; i++) {
Property p = (Property) properties [i];
if (p.GetBuilder != null)
members.Add (p.GetBuilder);
if (p.SetBuilder != null)
members.Add (p.SetBuilder);
}
}
if (indexers != null) {
int len = indexers.Count;
for (int i = 0; i < len; i++) {
Indexer ix = (Indexer) indexers [i];
if (ix.GetBuilder != null)
members.Add (ix.GetBuilder);
if (ix.SetBuilder != null)
members.Add (ix.SetBuilder);
}
}
if (events != null) {
int len = events.Count;
for (int i = 0; i < len; i++) {
Event e = (Event) events [i];
if (e.AddBuilder != null)
members.Add (e.AddBuilder);
if (e.RemoveBuilder != null)
members.Add (e.RemoveBuilder);
}
}
MethodInfo[] retMethods = new MethodInfo [members.Count];
members.CopyTo (retMethods, 0);
return retMethods;
}
// Indicated whether container has StructLayout attribute set Explicit
public bool HasExplicitLayout {
get { return (caching_flags & Flags.HasExplicitLayout) != 0; }
set { caching_flags |= Flags.HasExplicitLayout; }
}
public bool HasStructLayout {
get { return (caching_flags & Flags.HasStructLayout) != 0; }
set { caching_flags |= Flags.HasStructLayout; }
}
//
// Return the nested type with name @name. Ensures that the nested type
// is defined if necessary. Do _not_ use this when you have a MemberCache handy.
//
public Type FindNestedType (string name)
{
if (PartialContainer != this)
throw new InternalErrorException ("should not happen");
ArrayList [] lists = { types, delegates };
for (int j = 0; j < lists.Length; ++j) {
ArrayList list = lists [j];
if (list == null)
continue;
int len = list.Count;
for (int i = 0; i < len; ++i) {
DeclSpace ds = (DeclSpace) list [i];
if (ds.Basename == name) {
return ds.DefineType ();
}
}
}
return null;
}
private void FindMembers_NestedTypes (int modflags,
BindingFlags bf, MemberFilter filter, object criteria,
ref ArrayList members)
{
ArrayList [] lists = { types, delegates };
for (int j = 0; j < lists.Length; ++j) {
ArrayList list = lists [j];
if (list == null)
continue;
int len = list.Count;
for (int i = 0; i < len; i++) {
DeclSpace ds = (DeclSpace) list [i];
if ((ds.ModFlags & modflags) == 0)
continue;
TypeBuilder tb = ds.TypeBuilder;
if (tb == null) {
if (!(criteria is string) || ds.Basename.Equals (criteria))
tb = ds.DefineType ();
}
if (tb != null && (filter (tb, criteria) == true)) {
if (members == null)
members = new ArrayList ();
members.Add (tb);
}
}
}
}
/// <summary>
/// This method returns the members of this type just like Type.FindMembers would
/// Only, we need to use this for types which are _being_ defined because MS'
/// implementation can't take care of that.
/// </summary>
//
// FIXME: return an empty static array instead of null, that cleans up
// some code and is consistent with some coding conventions I just found
// out existed ;-)
//
//
// Notice that in various cases we check if our field is non-null,
// something that would normally mean that there was a bug elsewhere.
//
// The problem happens while we are defining p-invoke methods, as those
// will trigger a FindMembers, but this happens before things are defined
//
// Since the whole process is a no-op, it is fine to check for null here.
//
// TODO: This approach will be one day completely removed, it's already
// used at few places only
//
//
public override MemberList FindMembers (MemberTypes mt, BindingFlags bf,
MemberFilter filter, object criteria)
{
ArrayList members = null;
int modflags = 0;
if ((bf & BindingFlags.Public) != 0)
modflags |= Modifiers.PUBLIC | Modifiers.PROTECTED |
Modifiers.INTERNAL;
if ((bf & BindingFlags.NonPublic) != 0)
modflags |= Modifiers.PRIVATE;
int static_mask = 0, static_flags = 0;
switch (bf & (BindingFlags.Static | BindingFlags.Instance)) {
case BindingFlags.Static:
static_mask = static_flags = Modifiers.STATIC;
break;
case BindingFlags.Instance:
static_mask = Modifiers.STATIC;
static_flags = 0;
break;
default:
static_mask = static_flags = 0;
break;
}
Timer.StartTimer (TimerType.TcFindMembers);
if (filter == null)
filter = accepting_filter;
if ((mt & MemberTypes.Field) != 0) {
if (fields != null) {
int len = fields.Count;
for (int i = 0; i < len; i++) {
FieldBase f = (FieldBase) fields [i];
if ((f.ModFlags & modflags) == 0)
continue;
if ((f.ModFlags & static_mask) != static_flags)
continue;
FieldBuilder fb = f.FieldBuilder;
if (fb != null && filter (fb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (fb);
}
}
}
if (constants != null) {
int len = constants.Count;
for (int i = 0; i < len; i++) {
Const con = (Const) constants [i];
if ((con.ModFlags & modflags) == 0)
continue;
if ((con.ModFlags & static_mask) != static_flags)
continue;
FieldBuilder fb = con.FieldBuilder;
if (fb == null) {
if (con.Define ())
fb = con.FieldBuilder;
}
if (fb != null && filter (fb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (fb);
}
}
}
}
if ((mt & MemberTypes.Method) != 0) {
if (methods != null) {
int len = methods.Count;
for (int i = 0; i < len; i++) {
MethodOrOperator m = (MethodOrOperator) methods [i];
if ((m.ModFlags & modflags) == 0)
continue;
if ((m.ModFlags & static_mask) != static_flags)
continue;
MethodBuilder mb = m.MethodBuilder;
if (mb != null && filter (mb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (mb);
}
}
}
if (operators != null) {
int len = operators.Count;
for (int i = 0; i < len; i++) {
Operator o = (Operator) operators [i];
if ((o.ModFlags & modflags) == 0)
continue;
if ((o.ModFlags & static_mask) != static_flags)
continue;
MethodBuilder ob = o.MethodBuilder;
if (ob != null && filter (ob, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (ob);
}
}
}
if (events != null) {
foreach (Event e in events) {
if ((e.ModFlags & modflags) == 0)
continue;
if ((e.ModFlags & static_mask) != static_flags)
continue;
MethodBuilder b = e.AddBuilder;
if (b != null && filter (b, criteria)) {
if (members == null)
members = new ArrayList (4);
members.Add (b);
}
b = e.RemoveBuilder;
if (b != null && filter (b, criteria)) {
if (members == null)
members = new ArrayList (4);
members.Add (b);
}
}
}
if (properties != null) {
int len = properties.Count;
for (int i = 0; i < len; i++) {
Property p = (Property) properties [i];
if ((p.ModFlags & modflags) == 0)
continue;
if ((p.ModFlags & static_mask) != static_flags)
continue;
MethodBuilder b;
b = p.GetBuilder;
if (b != null && filter (b, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (b);
}
b = p.SetBuilder;
if (b != null && filter (b, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (b);
}
}
}
if (indexers != null) {
int len = indexers.Count;
for (int i = 0; i < len; i++) {
Indexer ix = (Indexer) indexers [i];
if ((ix.ModFlags & modflags) == 0)
continue;
if ((ix.ModFlags & static_mask) != static_flags)
continue;
MethodBuilder b;
b = ix.GetBuilder;
if (b != null && filter (b, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (b);
}
b = ix.SetBuilder;
if (b != null && filter (b, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (b);
}
}
}
}
if ((mt & MemberTypes.Event) != 0) {
if (events != null) {
int len = events.Count;
for (int i = 0; i < len; i++) {
Event e = (Event) events [i];
if ((e.ModFlags & modflags) == 0)
continue;
if ((e.ModFlags & static_mask) != static_flags)
continue;
MemberInfo eb = e.EventBuilder;
if (eb != null && filter (eb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (e.EventBuilder);
}
}
}
}
if ((mt & MemberTypes.Property) != 0){
if (properties != null) {
int len = properties.Count;
for (int i = 0; i < len; i++) {
Property p = (Property) properties [i];
if ((p.ModFlags & modflags) == 0)
continue;
if ((p.ModFlags & static_mask) != static_flags)
continue;
MemberInfo pb = p.PropertyBuilder;
if (pb != null && filter (pb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (p.PropertyBuilder);
}
}
}
if (indexers != null) {
int len = indexers.Count;
for (int i = 0; i < len; i++) {
Indexer ix = (Indexer) indexers [i];
if ((ix.ModFlags & modflags) == 0)
continue;
if ((ix.ModFlags & static_mask) != static_flags)
continue;
MemberInfo ib = ix.PropertyBuilder;
if (ib != null && filter (ib, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (ix.PropertyBuilder);
}
}
}
}
if ((mt & MemberTypes.NestedType) != 0)
FindMembers_NestedTypes (modflags, bf, filter, criteria, ref members);
if ((mt & MemberTypes.Constructor) != 0){
if (((bf & BindingFlags.Instance) != 0) && (instance_constructors != null)){
int len = instance_constructors.Count;
for (int i = 0; i < len; i++) {
Constructor c = (Constructor) instance_constructors [i];
ConstructorBuilder cb = c.ConstructorBuilder;
if (cb != null && filter (cb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (cb);
}
}
}
if (((bf & BindingFlags.Static) != 0) && (default_static_constructor != null)){
ConstructorBuilder cb =
default_static_constructor.ConstructorBuilder;
if (cb != null && filter (cb, criteria) == true) {
if (members == null)
members = new ArrayList ();
members.Add (cb);
}
}
}
//
// Lookup members in base if requested.
//
if ((bf & BindingFlags.DeclaredOnly) == 0) {
if (TypeBuilder.BaseType != null) {
MemberList list = FindMembers (TypeBuilder.BaseType, mt, bf, filter, criteria);
if (list.Count > 0) {
if (members == null)
members = new ArrayList ();
members.AddRange (list);
}
}
}
Timer.StopTimer (TimerType.TcFindMembers);
if (members == null)
return MemberList.Empty;
else
return new MemberList (members);
}
public override MemberCache MemberCache {
get {
return member_cache;
}
}
public static MemberList FindMembers (Type t, MemberTypes mt, BindingFlags bf,
MemberFilter filter, object criteria)
{
DeclSpace ds = TypeManager.LookupDeclSpace (t);
if (ds != null)
return ds.FindMembers (mt, bf, filter, criteria);
else
return new MemberList (t.FindMembers (mt, bf, filter, criteria));
}
/// <summary>
/// Emits the values for the constants
/// </summary>
public void EmitConstants ()
{
if (constants != null)
foreach (Const con in constants)
con.Emit ();
return;
}
void CheckMemberUsage (MemberCoreArrayList al, string member_type)
{
if (al == null)
return;
foreach (MemberCore mc in al) {
if ((mc.ModFlags & Modifiers.Accessibility) != Modifiers.PRIVATE)
continue;
if (!mc.IsUsed && (mc.caching_flags & Flags.Excluded) == 0) {
Report.Warning (169, 3, mc.Location, "The private {0} `{1}' is never used", member_type, mc.GetSignatureForError ());
}
}
}
public virtual void VerifyMembers ()
{
//
// Check for internal or private fields that were never assigned
//
if (Report.WarningLevel >= 3) {
CheckMemberUsage (properties, "property");
CheckMemberUsage (methods, "method");
CheckMemberUsage (constants, "constant");
if (fields != null){
bool is_type_exposed = Kind == Kind.Struct || IsExposedFromAssembly ();
foreach (FieldBase f in fields) {
if ((f.ModFlags & Modifiers.Accessibility) != Modifiers.PRIVATE) {
if (is_type_exposed)
continue;
f.SetMemberIsUsed ();
}
if (!f.IsUsed){
if ((f.caching_flags & Flags.IsAssigned) == 0)
Report.Warning (169, 3, f.Location, "The private field `{0}' is never used", f.GetSignatureForError ());
else {
#if NET_2_0
const int error_code = 414;
#else
const int error_code = 169;
#endif
Report.Warning (error_code, 3, f.Location, "The private field `{0}' is assigned but its value is never used",
f.GetSignatureForError ());
}
continue;
}
//
// Only report 649 on level 4
//
if (Report.WarningLevel < 4)
continue;
if ((f.caching_flags & Flags.IsAssigned) != 0)
continue;
//
// Don't be pendatic over serializable attributes
//
if (f.OptAttributes != null || PartialContainer.HasStructLayout)
continue;
Constant c = New.Constantify (f.MemberType);
Report.Warning (649, 4, f.Location, "Field `{0}' is never assigned to, and will always have its default value `{1}'",
f.GetSignatureForError (), c == null ? "null" : c.AsString ());
}
}
}
}
// TODO: move to ClassOrStruct
void EmitConstructors ()
{
if (instance_constructors == null)
return;
if (TypeBuilder.IsSubclassOf (TypeManager.attribute_type) && RootContext.VerifyClsCompliance && IsClsComplianceRequired ()) {
bool has_compliant_args = false;
foreach (Constructor c in instance_constructors) {
try {
c.Emit ();
}
catch (Exception e) {
throw new InternalErrorException (c, e);
}
if (has_compliant_args)
continue;
has_compliant_args = c.HasCompliantArgs;
}
if (!has_compliant_args)
Report.Warning (3015, 1, Location, "`{0}' has no accessible constructors which use only CLS-compliant types", GetSignatureForError ());
} else {
foreach (Constructor c in instance_constructors) {
try {
c.Emit ();
}
catch (Exception e) {
throw new InternalErrorException (c, e);
}
}
}
}
/// <summary>
/// Emits the code, this step is performed after all
/// the types, enumerations, constructors
/// </summary>
public virtual void EmitType ()
{
if (OptAttributes != null)
OptAttributes.Emit ();
Emit ();
EmitConstructors ();
// Can not continue if constants are broken
EmitConstants ();
if (Report.Errors > 0)
return;
if (default_static_constructor != null)
default_static_constructor.Emit ();
if (operators != null)
foreach (Operator o in operators)
o.Emit ();
if (properties != null)
foreach (Property p in properties)
p.Emit ();
if (indexers != null) {
foreach (Indexer indx in indexers)
indx.Emit ();
EmitIndexerName ();
}
if (events != null){
foreach (Event e in Events)
e.Emit ();
}
if (methods != null) {
for (int i = 0; i < methods.Count; ++i)
((MethodOrOperator) methods [i]).Emit ();
}
if (fields != null)
foreach (FieldBase f in fields)
f.Emit ();
if (delegates != null) {
foreach (Delegate d in Delegates) {
d.Emit ();
}
}
if (pending != null)
pending.VerifyPendingMethods (Report);
if (Report.Errors > 0)
return;
if (compiler_generated != null) {
for (int i = 0; i < compiler_generated.Count; ++i)
((CompilerGeneratedClass) compiler_generated [i]).EmitType ();
}
}
public override void CloseType ()
{
if ((caching_flags & Flags.CloseTypeCreated) != 0)
return;
try {
caching_flags |= Flags.CloseTypeCreated;
TypeBuilder.CreateType ();
} catch (TypeLoadException){
//
// This is fine, the code still created the type
//
// Report.Warning (-20, "Exception while creating class: " + TypeBuilder.Name);
// Console.WriteLine (e.Message);
} catch (Exception e) {
throw new InternalErrorException (this, e);
}
if (Types != null){
foreach (TypeContainer tc in Types)
if (tc.Kind == Kind.Struct)
tc.CloseType ();
foreach (TypeContainer tc in Types)
if (tc.Kind != Kind.Struct)
tc.CloseType ();
}
if (Delegates != null)
foreach (Delegate d in Delegates)
d.CloseType ();
if (compiler_generated != null)
foreach (CompilerGeneratedClass c in compiler_generated)
c.CloseType ();
PartialContainer = null;
types = null;
// properties = null;
delegates = null;
fields = null;
initialized_fields = null;
initialized_static_fields = null;
constants = null;
ordered_explicit_member_list = null;
ordered_member_list = null;
methods = null;
events = null;
indexers = null;
operators = null;
compiler_generated = null;
default_constructor = null;
default_static_constructor = null;
type_bases = null;
OptAttributes = null;
ifaces = null;
base_cache = null;
member_cache = null;
}
//
// Performs the validation on a Method's modifiers (properties have
// the same properties).
//
public bool MethodModifiersValid (MemberCore mc)
{
const int vao = (Modifiers.VIRTUAL | Modifiers.ABSTRACT | Modifiers.OVERRIDE);
const int va = (Modifiers.VIRTUAL | Modifiers.ABSTRACT);
const int nv = (Modifiers.NEW | Modifiers.VIRTUAL);
bool ok = true;
int flags = mc.ModFlags;
//
// At most one of static, virtual or override
//
if ((flags & Modifiers.STATIC) != 0){
if ((flags & vao) != 0){
Report.Error (112, mc.Location, "A static member `{0}' cannot be marked as override, virtual or abstract",
mc.GetSignatureForError ());
ok = false;
}
}
if (Kind == Kind.Struct){
if ((flags & va) != 0){
Modifiers.Error_InvalidModifier (mc.Location, "virtual or abstract", Report);
ok = false;
}
}
if ((flags & Modifiers.OVERRIDE) != 0 && (flags & nv) != 0){
Report.Error (113, mc.Location, "A member `{0}' marked as override cannot be marked as new or virtual",
mc.GetSignatureForError ());
ok = false;
}
//
// If the declaration includes the abstract modifier, then the
// declaration does not include static, virtual or extern
//
if ((flags & Modifiers.ABSTRACT) != 0){
if ((flags & Modifiers.EXTERN) != 0){
Report.Error (
180, mc.Location, "`{0}' cannot be both extern and abstract", mc.GetSignatureForError ());
ok = false;
}
if ((flags & Modifiers.SEALED) != 0) {
Report.Error (502, mc.Location, "`{0}' cannot be both abstract and sealed", mc.GetSignatureForError ());
ok = false;
}
if ((flags & Modifiers.VIRTUAL) != 0){
Report.Error (503, mc.Location, "The abstract method `{0}' cannot be marked virtual", mc.GetSignatureForError ());
ok = false;
}
if ((ModFlags & Modifiers.ABSTRACT) == 0){
Report.SymbolRelatedToPreviousError (this);
Report.Error (513, mc.Location, "`{0}' is abstract but it is declared in the non-abstract class `{1}'",
mc.GetSignatureForError (), GetSignatureForError ());
ok = false;
}
}
if ((flags & Modifiers.PRIVATE) != 0){
if ((flags & vao) != 0){
Report.Error (621, mc.Location, "`{0}': virtual or abstract members cannot be private", mc.GetSignatureForError ());
ok = false;
}
}
if ((flags & Modifiers.SEALED) != 0){
if ((flags & Modifiers.OVERRIDE) == 0){
Report.Error (238, mc.Location, "`{0}' cannot be sealed because it is not an override", mc.GetSignatureForError ());
ok = false;
}
}
return ok;
}
public Constructor DefaultStaticConstructor {
get { return default_static_constructor; }
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
VerifyClsName ();
Type base_type = TypeBuilder.BaseType;
if (base_type != null && !AttributeTester.IsClsCompliant (base_type)) {
Report.Warning (3009, 1, Location, "`{0}': base type `{1}' is not CLS-compliant", GetSignatureForError (), TypeManager.CSharpName (base_type));
}
return true;
}
/// <summary>
/// Checks whether container name is CLS Compliant
/// </summary>
void VerifyClsName ()
{
Hashtable base_members = base_cache == null ?
new Hashtable () :
base_cache.GetPublicMembers ();
Hashtable this_members = new Hashtable ();
foreach (DictionaryEntry entry in defined_names) {
MemberCore mc = (MemberCore)entry.Value;
if (!mc.IsClsComplianceRequired ())
continue;
string name = (string) entry.Key;
string basename = name.Substring (name.LastIndexOf ('.') + 1);
string lcase = basename.ToLower (System.Globalization.CultureInfo.InvariantCulture);
object found = base_members [lcase];
if (found == null) {
found = this_members [lcase];
if (found == null) {
this_members.Add (lcase, mc);
continue;
}
}
if ((mc.ModFlags & Modifiers.OVERRIDE) != 0)
continue;
if (found is MemberInfo) {
if (basename == ((MemberInfo) found).Name)
continue;
Report.SymbolRelatedToPreviousError ((MemberInfo) found);
} else {
Report.SymbolRelatedToPreviousError ((MemberCore) found);
}
Report.Warning (3005, 1, mc.Location, "Identifier `{0}' differing only in case is not CLS-compliant", mc.GetSignatureForError ());
}
}
/// <summary>
/// Performs checks for an explicit interface implementation. First it
/// checks whether the `interface_type' is a base inteface implementation.
/// Then it checks whether `name' exists in the interface type.
/// </summary>
public bool VerifyImplements (InterfaceMemberBase mb)
{
if (ifaces != null) {
foreach (Type t in ifaces){
if (TypeManager.IsEqual (t, mb.InterfaceType))
return true;
}
}
Report.SymbolRelatedToPreviousError (mb.InterfaceType);
Report.Error (540, mb.Location, "`{0}': containing type does not implement interface `{1}'",
mb.GetSignatureForError (), TypeManager.CSharpName (mb.InterfaceType));
return false;
}
public override Type LookupAnyGeneric (string typeName)
{
if (types != null) {
foreach (TypeContainer tc in types) {
if (!tc.IsGeneric)
continue;
int pos = tc.Basename.LastIndexOf ('`');
if (pos == typeName.Length && String.Compare (typeName, 0, tc.Basename, 0, pos) == 0)
return tc.TypeBuilder;
}
}
return base.LookupAnyGeneric (typeName);
}
public void Mark_HasEquals ()
{
cached_method |= CachedMethods.Equals;
}
public void Mark_HasGetHashCode ()
{
cached_method |= CachedMethods.GetHashCode;
}
/// <summary>
/// Method container contains Equals method
/// </summary>
public bool HasEquals {
get {
return (cached_method & CachedMethods.Equals) != 0;
}
}
/// <summary>
/// Method container contains GetHashCode method
/// </summary>
public bool HasGetHashCode {
get {
return (cached_method & CachedMethods.GetHashCode) != 0;
}
}
public bool HasStaticFieldInitializer {
get {
return (cached_method & CachedMethods.HasStaticFieldInitializer) != 0;
}
set {
if (value)
cached_method |= CachedMethods.HasStaticFieldInitializer;
else
cached_method &= ~CachedMethods.HasStaticFieldInitializer;
}
}
//
// IMemberContainer
//
string IMemberContainer.Name {
get {
return Name;
}
}
Type IMemberContainer.Type {
get {
return TypeBuilder;
}
}
bool IMemberContainer.IsInterface {
get {
return Kind == Kind.Interface;
}
}
MemberList IMemberContainer.GetMembers (MemberTypes mt, BindingFlags bf)
{
BindingFlags new_bf = bf | BindingFlags.DeclaredOnly;
if (GenericType != null)
return TypeManager.FindMembers (GenericType, mt, new_bf,
null, null);
else
return FindMembers (mt, new_bf, null, null);
}
//
// Generates xml doc comments (if any), and if required,
// handle warning report.
//
internal override void GenerateDocComment (DeclSpace ds)
{
DocUtil.GenerateTypeDocComment (this, ds, Report);
}
public override string DocCommentHeader {
get { return "T:"; }
}
public MemberCache BaseCache {
get {
if (base_cache != null)
return base_cache;
if (TypeBuilder.BaseType != null)
base_cache = TypeManager.LookupMemberCache (TypeBuilder.BaseType);
if (TypeBuilder.IsInterface)
base_cache = TypeManager.LookupBaseInterfacesCache (TypeBuilder);
return base_cache;
}
}
}
public abstract class ClassOrStruct : TypeContainer {
ListDictionary declarative_security;
public ClassOrStruct (NamespaceEntry ns, DeclSpace parent,
MemberName name, Attributes attrs, Kind kind)
: base (ns, parent, name, attrs, kind)
{
}
protected override bool AddToContainer (MemberCore symbol, string name)
{
if (name == MemberName.Name) {
if (symbol is TypeParameter) {
Report.Error (694, symbol.Location,
"Type parameter `{0}' has same name as containing type, or method",
symbol.GetSignatureForError ());
return false;
}
InterfaceMemberBase imb = symbol as InterfaceMemberBase;
if (imb == null || !imb.IsExplicitImpl) {
Report.SymbolRelatedToPreviousError (this);
Report.Error (542, symbol.Location, "`{0}': member names cannot be the same as their enclosing type",
symbol.GetSignatureForError ());
return false;
}
}
return base.AddToContainer (symbol, name);
}
public override void VerifyMembers ()
{
base.VerifyMembers ();
if ((events != null) && Report.WarningLevel >= 3) {
foreach (Event e in events){
// Note: The event can be assigned from same class only, so we can report
// this warning for all accessibility modes
if ((e.caching_flags & Flags.IsUsed) == 0)
Report.Warning (67, 3, e.Location, "The event `{0}' is never used", e.GetSignatureForError ());
}
}
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.IsValidSecurityAttribute ()) {
if (declarative_security == null)
declarative_security = new ListDictionary ();
a.ExtractSecurityPermissionSet (declarative_security);
return;
}
if (a.Type == pa.StructLayout) {
PartialContainer.HasStructLayout = true;
if (a.GetLayoutKindValue () == LayoutKind.Explicit)
PartialContainer.HasExplicitLayout = true;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
/// <summary>
/// Defines the default constructors
/// </summary>
protected void DefineDefaultConstructor (bool is_static)
{
// The default instance constructor is public
// If the class is abstract, the default constructor is protected
// The default static constructor is private
int mods;
if (is_static) {
mods = Modifiers.STATIC | Modifiers.PRIVATE;
} else {
mods = ((ModFlags & Modifiers.ABSTRACT) != 0) ? Modifiers.PROTECTED : Modifiers.PUBLIC;
}
Constructor c = new Constructor (this, MemberName.Name, mods,
null, ParametersCompiled.EmptyReadOnlyParameters,
new GeneratedBaseInitializer (Location),
Location);
AddConstructor (c);
c.Block = new ToplevelBlock (Compiler, ParametersCompiled.EmptyReadOnlyParameters, Location);
}
public override bool Define ()
{
CheckProtectedModifier ();
base.Define ();
if (default_static_constructor != null)
default_static_constructor.Define ();
return true;
}
public override void Emit ()
{
if (default_static_constructor == null && PartialContainer.HasStaticFieldInitializer) {
DefineDefaultConstructor (true);
default_static_constructor.Define ();
}
base.Emit ();
if (declarative_security != null) {
foreach (DictionaryEntry de in declarative_security) {
TypeBuilder.AddDeclarativeSecurity ((SecurityAction)de.Key, (PermissionSet)de.Value);
}
}
}
public override ExtensionMethodGroupExpr LookupExtensionMethod (Type extensionType, string name, Location loc)
{
DeclSpace top_level = Parent;
if (top_level != null) {
while (top_level.Parent != null)
top_level = top_level.Parent;
ArrayList candidates = NamespaceEntry.NS.LookupExtensionMethod (extensionType, this, name);
if (candidates != null)
return new ExtensionMethodGroupExpr (candidates, NamespaceEntry, extensionType, loc);
}
return NamespaceEntry.LookupExtensionMethod (extensionType, name, loc);
}
protected override TypeAttributes TypeAttr {
get {
if (default_static_constructor == null)
return base.TypeAttr | TypeAttributes.BeforeFieldInit;
return base.TypeAttr;
}
}
}
// TODO: should be sealed
public class Class : ClassOrStruct {
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.ABSTRACT |
Modifiers.SEALED |
Modifiers.STATIC |
Modifiers.UNSAFE;
public const TypeAttributes StaticClassAttribute = TypeAttributes.Abstract | TypeAttributes.Sealed;
public Class (NamespaceEntry ns, DeclSpace parent, MemberName name, int mod,
Attributes attrs)
: base (ns, parent, name, attrs, Kind.Class)
{
int accmods = Parent.Parent == null ? Modifiers.INTERNAL : Modifiers.PRIVATE;
this.ModFlags = Modifiers.Check (AllowedModifiers, mod, accmods, Location, Report);
if (IsStatic && RootContext.Version == LanguageVersion.ISO_1) {
Report.FeatureIsNotAvailable (Location, "static classes");
}
}
public override void AddBasesForPart (DeclSpace part, ArrayList bases)
{
if (part.Name == "System.Object")
Report.Error (537, part.Location,
"The class System.Object cannot have a base class or implement an interface.");
base.AddBasesForPart (part, bases);
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.AttributeUsage) {
if (!TypeManager.IsAttributeType (BaseType) &&
TypeBuilder.FullName != "System.Attribute") {
Report.Error (641, a.Location, "Attribute `{0}' is only valid on classes derived from System.Attribute", a.GetSignatureForError ());
}
}
if (a.Type == pa.Conditional && !TypeManager.IsAttributeType (BaseType)) {
Report.Error (1689, a.Location, "Attribute `System.Diagnostics.ConditionalAttribute' is only valid on methods or attribute classes");
return;
}
if (a.Type == pa.ComImport && !attributes.Contains (pa.Guid)) {
a.Error_MissingGuidAttribute ();
return;
}
if (a.Type == pa.Extension) {
a.Error_MisusedExtensionAttribute ();
return;
}
if (AttributeTester.IsAttributeExcluded (a.Type, Location))
return;
base.ApplyAttributeBuilder (a, cb, pa);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Class;
}
}
protected override void DefineContainerMembers (MemberCoreArrayList list)
{
if (list == null)
return;
if (!IsStatic) {
base.DefineContainerMembers (list);
return;
}
foreach (MemberCore m in list) {
if (m is Operator) {
Report.Error (715, m.Location, "`{0}': Static classes cannot contain user-defined operators", m.GetSignatureForError ());
continue;
}
if (m is Destructor) {
Report.Error (711, m.Location, "`{0}': Static classes cannot contain destructor", GetSignatureForError ());
continue;
}
if (m is Indexer) {
Report.Error (720, m.Location, "`{0}': cannot declare indexers in a static class", m.GetSignatureForError ());
continue;
}
if ((m.ModFlags & Modifiers.STATIC) != 0 || m is Enum || m is Delegate)
continue;
if (m is Constructor) {
Report.Error (710, m.Location, "`{0}': Static classes cannot have instance constructors", GetSignatureForError ());
continue;
}
Method method = m as Method;
if (method != null && method.Parameters.HasExtensionMethodType) {
Report.Error (1105, m.Location, "`{0}': Extension methods must be declared static", m.GetSignatureForError ());
continue;
}
Report.Error (708, m.Location, "`{0}': cannot declare instance members in a static class", m.GetSignatureForError ());
}
base.DefineContainerMembers (list);
}
public override bool Define ()
{
if ((ModFlags & Modifiers.ABSTRACT) == Modifiers.ABSTRACT && (ModFlags & (Modifiers.SEALED | Modifiers.STATIC)) != 0) {
Report.Error (418, Location, "`{0}': an abstract class cannot be sealed or static", GetSignatureForError ());
}
if ((ModFlags & (Modifiers.SEALED | Modifiers.STATIC)) == (Modifiers.SEALED | Modifiers.STATIC)) {
Report.Error (441, Location, "`{0}': a class cannot be both static and sealed", GetSignatureForError ());
}
return base.Define ();
}
protected override bool DoDefineMembers ()
{
if (InstanceConstructors == null && !IsStatic)
DefineDefaultConstructor (false);
return base.DoDefineMembers ();
}
public override void Emit ()
{
base.Emit ();
if ((ModFlags & Modifiers.METHOD_EXTENSION) != 0)
PredefinedAttributes.Get.Extension.EmitAttribute (TypeBuilder);
}
protected override TypeExpr[] ResolveBaseTypes (out TypeExpr base_class)
{
TypeExpr[] ifaces = base.ResolveBaseTypes (out base_class);
if (base_class == null) {
if (RootContext.StdLib)
base_class = TypeManager.system_object_expr;
else if (Name != "System.Object")
base_class = TypeManager.system_object_expr;
} else {
if (Kind == Kind.Class && TypeManager.IsGenericParameter (base_class.Type)){
Report.Error (
689, base_class.Location,
"Cannot derive from `{0}' because it is a type parameter",
base_class.GetSignatureForError ());
return ifaces;
}
if (IsGeneric && TypeManager.IsAttributeType (base_class.Type)) {
Report.Error (698, base_class.Location,
"A generic type cannot derive from `{0}' because it is an attribute class",
base_class.GetSignatureForError ());
}
if (base_class.IsSealed){
Report.SymbolRelatedToPreviousError (base_class.Type);
if (base_class.Type.IsAbstract) {
Report.Error (709, Location, "`{0}': Cannot derive from static class `{1}'",
GetSignatureForError (), TypeManager.CSharpName (base_class.Type));
} else {
Report.Error (509, Location, "`{0}': cannot derive from sealed type `{1}'",
GetSignatureForError (), TypeManager.CSharpName (base_class.Type));
}
return ifaces;
}
if (!base_class.CanInheritFrom ()){
Report.Error (644, Location, "`{0}' cannot derive from special class `{1}'",
GetSignatureForError (), base_class.GetSignatureForError ());
return ifaces;
}
if (!IsAccessibleAs (base_class.Type)) {
Report.SymbolRelatedToPreviousError (base_class.Type);
Report.Error (60, Location, "Inconsistent accessibility: base class `{0}' is less accessible than class `{1}'",
TypeManager.CSharpName (base_class.Type), GetSignatureForError ());
}
}
if (PartialContainer.IsStaticClass) {
if (base_class.Type != TypeManager.object_type) {
Report.Error (713, Location, "Static class `{0}' cannot derive from type `{1}'. Static classes must derive from object",
GetSignatureForError (), base_class.GetSignatureForError ());
return ifaces;
}
if (ifaces != null) {
foreach (TypeExpr t in ifaces)
Report.SymbolRelatedToPreviousError (t.Type);
Report.Error (714, Location, "Static class `{0}' cannot implement interfaces", GetSignatureForError ());
}
}
return ifaces;
}
/// Search for at least one defined condition in ConditionalAttribute of attribute class
/// Valid only for attribute classes.
public bool IsExcluded ()
{
if ((caching_flags & Flags.Excluded_Undetected) == 0)
return (caching_flags & Flags.Excluded) != 0;
caching_flags &= ~Flags.Excluded_Undetected;
if (OptAttributes == null)
return false;
Attribute[] attrs = OptAttributes.SearchMulti (PredefinedAttributes.Get.Conditional);
if (attrs == null)
return false;
foreach (Attribute a in attrs) {
string condition = a.GetConditionalAttributeValue ();
if (Location.CompilationUnit.IsConditionalDefined (condition))
return false;
}
caching_flags |= Flags.Excluded;
return true;
}
//
// FIXME: How do we deal with the user specifying a different
// layout?
//
protected override TypeAttributes TypeAttr {
get {
TypeAttributes ta = base.TypeAttr | TypeAttributes.AutoLayout | TypeAttributes.Class;
if (IsStatic)
ta |= StaticClassAttribute;
return ta;
}
}
}
public sealed class Struct : ClassOrStruct {
bool is_unmanaged, has_unmanaged_check_done;
// <summary>
// Modifiers allowed in a struct declaration
// </summary>
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.UNSAFE |
Modifiers.PRIVATE;
public Struct (NamespaceEntry ns, DeclSpace parent, MemberName name,
int mod, Attributes attrs)
: base (ns, parent, name, attrs, Kind.Struct)
{
int accmods;
if (parent.Parent == null)
accmods = Modifiers.INTERNAL;
else
accmods = Modifiers.PRIVATE;
this.ModFlags = Modifiers.Check (AllowedModifiers, mod, accmods, Location, Report);
this.ModFlags |= Modifiers.SEALED;
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
base.ApplyAttributeBuilder (a, cb, pa);
//
// When struct constains fixed fixed and struct layout has explicitly
// set CharSet, its value has to be propagated to compiler generated
// fixed field types
//
if (a.Type == pa.StructLayout && Fields != null && a.HasField ("CharSet")) {
for (int i = 0; i < Fields.Count; ++i) {
FixedField ff = Fields [i] as FixedField;
if (ff != null)
ff.SetCharSet (TypeBuilder.Attributes);
}
}
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Struct;
}
}
public override bool IsUnmanagedType ()
{
if (fields == null)
return true;
if (requires_delayed_unmanagedtype_check)
return true;
if (has_unmanaged_check_done)
return is_unmanaged;
has_unmanaged_check_done = true;
foreach (FieldBase f in fields) {
if ((f.ModFlags & Modifiers.STATIC) != 0)
continue;
// It can happen when recursive unmanaged types are defined
// struct S { S* s; }
Type mt = f.MemberType;
if (mt == null) {
has_unmanaged_check_done = false;
requires_delayed_unmanagedtype_check = true;
return true;
}
// TODO: Remove when pointer types are under mcs control
while (mt.IsPointer)
mt = TypeManager.GetElementType (mt);
if (TypeManager.IsEqual (mt, TypeBuilder))
continue;
if (TypeManager.IsUnmanagedType (mt))
continue;
return false;
}
is_unmanaged = true;
return true;
}
protected override TypeExpr[] ResolveBaseTypes (out TypeExpr base_class)
{
TypeExpr[] ifaces = base.ResolveBaseTypes (out base_class);
//
// If we are compiling our runtime,
// and we are defining ValueType, then our
// base is `System.Object'.
//
if (base_class == null) {
if (!RootContext.StdLib && Name == "System.ValueType")
base_class = TypeManager.system_object_expr;
else
base_class = TypeManager.system_valuetype_expr;
}
return ifaces;
}
//
// FIXME: Allow the user to specify a different set of attributes
// in some cases (Sealed for example is mandatory for a class,
// but what SequentialLayout can be changed
//
protected override TypeAttributes TypeAttr {
get {
const TypeAttributes DefaultTypeAttributes =
TypeAttributes.SequentialLayout |
TypeAttributes.Sealed;
return base.TypeAttr | DefaultTypeAttributes;
}
}
public override void RegisterFieldForInitialization (MemberCore field, FieldInitializer expression)
{
if ((field.ModFlags & Modifiers.STATIC) == 0) {
Report.Error (573, field.Location, "`{0}': Structs cannot have instance field initializers",
field.GetSignatureForError ());
return;
}
base.RegisterFieldForInitialization (field, expression);
}
}
/// <summary>
/// Interfaces
/// </summary>
public sealed class Interface : TypeContainer, IMemberContainer {
/// <summary>
/// Modifiers allowed in a class declaration
/// </summary>
public const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.UNSAFE |
Modifiers.PRIVATE;
public Interface (NamespaceEntry ns, DeclSpace parent, MemberName name, int mod,
Attributes attrs)
: base (ns, parent, name, attrs, Kind.Interface)
{
int accmods;
if (parent.Parent == null)
accmods = Modifiers.INTERNAL;
else
accmods = Modifiers.PRIVATE;
this.ModFlags = Modifiers.Check (AllowedModifiers, mod, accmods, name.Location, Report);
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.ComImport && !attributes.Contains (pa.Guid)) {
a.Error_MissingGuidAttribute ();
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Interface;
}
}
protected override TypeAttributes TypeAttr {
get {
const TypeAttributes DefaultTypeAttributes =
TypeAttributes.AutoLayout |
TypeAttributes.Abstract |
TypeAttributes.Interface;
return base.TypeAttr | DefaultTypeAttributes;
}
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
if (ifaces != null) {
foreach (Type t in ifaces) {
if (AttributeTester.IsClsCompliant (t))
continue;
Report.SymbolRelatedToPreviousError (t);
Report.Warning (3027, 1, Location, "`{0}' is not CLS-compliant because base interface `{1}' is not CLS-compliant",
GetSignatureForError (), TypeManager.CSharpName (t));
}
}
return true;
}
}
// It is used as a base class for all property based members
// This includes properties, indexers, and events
public abstract class PropertyBasedMember : InterfaceMemberBase
{
public PropertyBasedMember (DeclSpace parent, GenericMethod generic,
FullNamedExpression type, int mod, int allowed_mod,
MemberName name, Attributes attrs)
: base (parent, generic, type, mod, allowed_mod, name, attrs)
{
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
if (!AttributeTester.IsClsCompliant (MemberType)) {
Report.Warning (3003, 1, Location, "Type of `{0}' is not CLS-compliant",
GetSignatureForError ());
}
return true;
}
}
public abstract class MethodCore : InterfaceMemberBase
{
public readonly ParametersCompiled Parameters;
protected ToplevelBlock block;
public MethodCore (DeclSpace parent, GenericMethod generic,
FullNamedExpression type, int mod, int allowed_mod,
MemberName name, Attributes attrs, ParametersCompiled parameters)
: base (parent, generic, type, mod, allowed_mod, name, attrs)
{
Parameters = parameters;
}
//
// Returns the System.Type array for the parameters of this method
//
public Type [] ParameterTypes {
get {
return Parameters.Types;
}
}
public ParametersCompiled ParameterInfo {
get {
return Parameters;
}
}
public ToplevelBlock Block {
get {
return block;
}
set {
block = value;
}
}
public CallingConventions CallingConventions {
get {
CallingConventions cc = Parameters.CallingConvention;
if (!IsInterface)
if ((ModFlags & Modifiers.STATIC) == 0)
cc |= CallingConventions.HasThis;
// FIXME: How is `ExplicitThis' used in C#?
return cc;
}
}
protected override bool CheckBase ()
{
// Check whether arguments were correct.
if (!DefineParameters (Parameters))
return false;
return base.CheckBase ();
}
//
// Returns a string that represents the signature for this
// member which should be used in XML documentation.
//
public override string GetDocCommentName (DeclSpace ds)
{
return DocUtil.GetMethodDocCommentName (this, Parameters, ds);
}
//
// Raised (and passed an XmlElement that contains the comment)
// when GenerateDocComment is writing documentation expectedly.
//
// FIXME: with a few effort, it could be done with XmlReader,
// that means removal of DOM use.
//
internal override void OnGenerateDocComment (XmlElement el)
{
DocUtil.OnMethodGenerateDocComment (this, el, Report);
}
//
// Represents header string for documentation comment.
//
public override string DocCommentHeader
{
get { return "M:"; }
}
public override bool EnableOverloadChecks (MemberCore overload)
{
if (overload is MethodCore || overload is AbstractPropertyEventMethod) {
caching_flags |= Flags.MethodOverloadsExist;
return true;
}
return base.EnableOverloadChecks (overload);
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
if (Parameters.HasArglist) {
Report.Warning (3000, 1, Location, "Methods with variable arguments are not CLS-compliant");
}
if (!AttributeTester.IsClsCompliant (MemberType)) {
Report.Warning (3002, 1, Location, "Return type of `{0}' is not CLS-compliant",
GetSignatureForError ());
}
Parameters.VerifyClsCompliance ();
return true;
}
}
public abstract class InterfaceMemberBase : MemberBase {
//
// Whether this is an interface member.
//
public bool IsInterface;
//
// If true, this is an explicit interface implementation
//
public bool IsExplicitImpl;
protected bool is_external_implementation;
//
// The interface type we are explicitly implementing
//
public Type InterfaceType;
//
// The method we're overriding if this is an override method.
//
protected MethodInfo base_method;
readonly int explicit_mod_flags;
public MethodAttributes flags;
public InterfaceMemberBase (DeclSpace parent, GenericMethod generic,
FullNamedExpression type, int mod, int allowed_mod,
MemberName name, Attributes attrs)
: base (parent, generic, type, mod, allowed_mod, Modifiers.PRIVATE,
name, attrs)
{
IsInterface = parent.PartialContainer.Kind == Kind.Interface;
IsExplicitImpl = (MemberName.Left != null);
explicit_mod_flags = mod;
}
protected override bool CheckBase ()
{
if (!base.CheckBase ())
return false;
if ((caching_flags & Flags.MethodOverloadsExist) != 0)
CheckForDuplications ();
if (IsExplicitImpl)
return true;
// Is null for System.Object while compiling corlib and base interfaces
if (Parent.PartialContainer.BaseCache == null) {
if ((ModFlags & Modifiers.NEW) != 0) {
Report.Warning (109, 4, Location, "The member `{0}' does not hide an inherited member. The new keyword is not required", GetSignatureForError ());
}
return true;
}
Type base_ret_type = null;
base_method = FindOutBaseMethod (ref base_ret_type);
// method is override
if (base_method != null) {
if (!CheckMethodAgainstBase (base_ret_type))
return false;
if ((ModFlags & Modifiers.OVERRIDE) != 0) {
ObsoleteAttribute oa = AttributeTester.GetMethodObsoleteAttribute (base_method);
if (oa != null) {
if (OptAttributes == null || !OptAttributes.Contains (PredefinedAttributes.Get.Obsolete)) {
Report.SymbolRelatedToPreviousError (base_method);
Report.Warning (672, 1, Location, "Member `{0}' overrides obsolete member `{1}'. Add the Obsolete attribute to `{0}'",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
}
} else {
if (OptAttributes != null && OptAttributes.Contains (PredefinedAttributes.Get.Obsolete)) {
Report.SymbolRelatedToPreviousError (base_method);
Report.Warning (809, 1, Location, "Obsolete member `{0}' overrides non-obsolete member `{1}'",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
}
}
}
return true;
}
MemberInfo conflict_symbol = Parent.PartialContainer.FindBaseMemberWithSameName (Name, !((this is Event) || (this is Property)));
if ((ModFlags & Modifiers.OVERRIDE) != 0) {
if (conflict_symbol != null) {
Report.SymbolRelatedToPreviousError (conflict_symbol);
if (this is Event)
Report.Error (72, Location, "`{0}': cannot override because `{1}' is not an event", GetSignatureForError (), TypeManager.GetFullNameSignature (conflict_symbol));
else if (this is PropertyBase)
Report.Error (544, Location, "`{0}': cannot override because `{1}' is not a property", GetSignatureForError (), TypeManager.GetFullNameSignature (conflict_symbol));
else
Report.Error (505, Location, "`{0}': cannot override because `{1}' is not a method", GetSignatureForError (), TypeManager.GetFullNameSignature (conflict_symbol));
} else {
Report.Error (115, Location, "`{0}' is marked as an override but no suitable {1} found to override",
GetSignatureForError (), SimpleName.GetMemberType (this));
}
return false;
}
if (conflict_symbol == null) {
if ((ModFlags & Modifiers.NEW) != 0) {
Report.Warning (109, 4, Location, "The member `{0}' does not hide an inherited member. The new keyword is not required", GetSignatureForError ());
}
return true;
}
if ((ModFlags & Modifiers.NEW) == 0) {
if (this is MethodOrOperator && conflict_symbol.MemberType == MemberTypes.Method)
return true;
Report.SymbolRelatedToPreviousError (conflict_symbol);
Report.Warning (108, 2, Location, "`{0}' hides inherited member `{1}'. Use the new keyword if hiding was intended",
GetSignatureForError (), TypeManager.GetFullNameSignature (conflict_symbol));
}
return true;
}
protected virtual bool CheckForDuplications ()
{
return Parent.MemberCache.CheckExistingMembersOverloads (
this, GetFullName (MemberName), ParametersCompiled.EmptyReadOnlyParameters, Report);
}
//
// Performs various checks on the MethodInfo `mb' regarding the modifier flags
// that have been defined.
//
// `name' is the user visible name for reporting errors (this is used to
// provide the right name regarding method names and properties)
//
bool CheckMethodAgainstBase (Type base_method_type)
{
bool ok = true;
if ((ModFlags & Modifiers.OVERRIDE) != 0){
if (!(base_method.IsAbstract || base_method.IsVirtual)){
Report.SymbolRelatedToPreviousError (base_method);
Report.Error (506, Location,
"`{0}': cannot override inherited member `{1}' because it is not marked virtual, abstract or override",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
ok = false;
}
// Now we check that the overriden method is not final
if (base_method.IsFinal) {
Report.SymbolRelatedToPreviousError (base_method);
Report.Error (239, Location, "`{0}': cannot override inherited member `{1}' because it is sealed",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
ok = false;
}
//
// Check that the permissions are not being changed
//
MethodAttributes thisp = flags & MethodAttributes.MemberAccessMask;
MethodAttributes base_classp = base_method.Attributes & MethodAttributes.MemberAccessMask;
if (!CheckAccessModifiers (thisp, base_classp, base_method)) {
Error_CannotChangeAccessModifiers (Location, base_method, base_classp, null);
ok = false;
}
if (!TypeManager.IsEqual (MemberType, TypeManager.TypeToCoreType (base_method_type))) {
Report.SymbolRelatedToPreviousError (base_method);
if (this is PropertyBasedMember) {
Report.Error (1715, Location, "`{0}': type must be `{1}' to match overridden member `{2}'",
GetSignatureForError (), TypeManager.CSharpName (base_method_type), TypeManager.CSharpSignature (base_method));
}
else {
Report.Error (508, Location, "`{0}': return type must be `{1}' to match overridden member `{2}'",
GetSignatureForError (), TypeManager.CSharpName (base_method_type), TypeManager.CSharpSignature (base_method));
}
ok = false;
}
}
if ((ModFlags & Modifiers.NEW) == 0) {
if ((ModFlags & Modifiers.OVERRIDE) == 0) {
ModFlags |= Modifiers.NEW;
Report.SymbolRelatedToPreviousError (base_method);
if (!IsInterface && (base_method.IsVirtual || base_method.IsAbstract)) {
Report.Warning (114, 2, Location, "`{0}' hides inherited member `{1}'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
if (base_method.IsAbstract){
Report.Error (533, Location, "`{0}' hides inherited abstract member `{1}'",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
ok = false;
}
} else {
Report.Warning (108, 2, Location, "`{0}' hides inherited member `{1}'. Use the new keyword if hiding was intended",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
}
}
} else {
if (base_method.IsAbstract && !IsInterface) {
Report.SymbolRelatedToPreviousError (base_method);
Report.Error (533, Location, "`{0}' hides inherited abstract member `{1}'",
GetSignatureForError (), TypeManager.CSharpSignature (base_method));
return ok = false;
}
}
return ok;
}
protected bool CheckAccessModifiers (MethodAttributes thisp, MethodAttributes base_classp, MethodInfo base_method)
{
if ((base_classp & MethodAttributes.FamORAssem) == MethodAttributes.FamORAssem){
//
// when overriding protected internal, the method can be declared
// protected internal only within the same assembly or assembly
// which has InternalsVisibleTo
//
if ((thisp & MethodAttributes.FamORAssem) == MethodAttributes.FamORAssem){
return TypeManager.IsThisOrFriendAssembly (base_method.DeclaringType.Assembly);
} else if ((thisp & MethodAttributes.Family) != MethodAttributes.Family) {
//
// if it's not "protected internal", it must be "protected"
//
return false;
} else if (Parent.TypeBuilder.Assembly == base_method.DeclaringType.Assembly) {
//
// protected within the same assembly - an error
//
return false;
} else if ((thisp & ~(MethodAttributes.Family | MethodAttributes.FamORAssem)) !=
(base_classp & ~(MethodAttributes.Family | MethodAttributes.FamORAssem))) {
//
// protected ok, but other attributes differ - report an error
//
return false;
}
return true;
} else {
return (thisp == base_classp);
}
}
public override bool Define ()
{
if (IsInterface) {
ModFlags = Modifiers.PUBLIC | Modifiers.ABSTRACT |
Modifiers.VIRTUAL | (ModFlags & (Modifiers.UNSAFE | Modifiers.NEW));
flags = MethodAttributes.Public |
MethodAttributes.Abstract |
MethodAttributes.HideBySig |
MethodAttributes.NewSlot |
MethodAttributes.Virtual;
} else {
Parent.PartialContainer.MethodModifiersValid (this);
flags = Modifiers.MethodAttr (ModFlags);
}
if (IsExplicitImpl) {
TypeExpr iface_texpr = MemberName.Left.GetTypeExpression ().ResolveAsTypeTerminal (this, false);
if (iface_texpr == null)
return false;
if ((ModFlags & Modifiers.PARTIAL) != 0) {
Report.Error (754, Location, "A partial method `{0}' cannot explicitly implement an interface",
GetSignatureForError ());
}
InterfaceType = iface_texpr.Type;
if (!InterfaceType.IsInterface) {
Report.SymbolRelatedToPreviousError (InterfaceType);
Report.Error (538, Location, "The type `{0}' in explicit interface declaration is not an interface",
TypeManager.CSharpName (InterfaceType));
} else {
Parent.PartialContainer.VerifyImplements (this);
}
Modifiers.Check (Modifiers.AllowedExplicitImplFlags, explicit_mod_flags, 0, Location, Report);
}
return base.Define ();
}
protected bool DefineParameters (ParametersCompiled parameters)
{
if (!parameters.Resolve (this))
return false;
bool error = false;
for (int i = 0; i < parameters.Count; ++i) {
Parameter p = parameters [i];
if (p.HasDefaultValue && (IsExplicitImpl || this is Operator || (this is Indexer && parameters.Count == 1)))
p.Warning_UselessOptionalParameter (Report);
if (p.CheckAccessibility (this))
continue;
Type t = parameters.Types [i];
Report.SymbolRelatedToPreviousError (t);
if (this is Indexer)
Report.Error (55, Location,
"Inconsistent accessibility: parameter type `{0}' is less accessible than indexer `{1}'",
TypeManager.CSharpName (t), GetSignatureForError ());
else if (this is Operator)
Report.Error (57, Location,
"Inconsistent accessibility: parameter type `{0}' is less accessible than operator `{1}'",
TypeManager.CSharpName (t), GetSignatureForError ());
else
Report.Error (51, Location,
"Inconsistent accessibility: parameter type `{0}' is less accessible than method `{1}'",
TypeManager.CSharpName (t), GetSignatureForError ());
error = true;
}
return !error;
}
public override void Emit()
{
// for extern static method must be specified either DllImport attribute or MethodImplAttribute.
// We are more strict than csc and report this as an error because SRE does not allow emit that
if ((ModFlags & Modifiers.EXTERN) != 0 && !is_external_implementation) {
if (this is Constructor) {
Report.Error (824, Location,
"Constructor `{0}' is marked `external' but has no external implementation specified", GetSignatureForError ());
} else {
Report.Error (626, Location,
"`{0}' is marked as an external but has no DllImport attribute. Consider adding a DllImport attribute to specify the external implementation",
GetSignatureForError ());
}
}
base.Emit ();
}
public override bool EnableOverloadChecks (MemberCore overload)
{
//
// Two members can differ in their explicit interface
// type parameter only
//
InterfaceMemberBase imb = overload as InterfaceMemberBase;
if (imb != null && imb.IsExplicitImpl) {
if (IsExplicitImpl) {
caching_flags |= Flags.MethodOverloadsExist;
}
return true;
}
return IsExplicitImpl;
}
protected void Error_CannotChangeAccessModifiers (Location loc, MemberInfo base_method, MethodAttributes ma, string suffix)
{
Report.SymbolRelatedToPreviousError (base_method);
string base_name = TypeManager.GetFullNameSignature (base_method);
string this_name = GetSignatureForError ();
if (suffix != null) {
base_name += suffix;
this_name += suffix;
}
Report.Error (507, loc, "`{0}': cannot change access modifiers when overriding `{1}' inherited member `{2}'",
this_name, Modifiers.GetDescription (ma), base_name);
}
protected static string Error722 {
get {
return "`{0}': static types cannot be used as return types";
}
}
/// <summary>
/// Gets base method and its return type
/// </summary>
protected abstract MethodInfo FindOutBaseMethod (ref Type base_ret_type);
//
// The "short" name of this property / indexer / event. This is the
// name without the explicit interface.
//
public string ShortName
{
get { return MemberName.Name; }
set { SetMemberName (new MemberName (MemberName.Left, value, Location)); }
}
//
// Returns full metadata method name
//
public string GetFullName (MemberName name)
{
if (!IsExplicitImpl)
return name.Name;
//
// When dealing with explicit members a full interface type
// name is added to member name to avoid possible name conflicts
//
// We use CSharpName which gets us full name with benefit of
// replacing predefined names which saves some space and name
// is still unique
//
return TypeManager.CSharpName (InterfaceType) + "." + name.Name;
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ()) {
if (IsInterface && HasClsCompliantAttribute && Parent.IsClsComplianceRequired ()) {
Report.Warning (3010, 1, Location, "`{0}': CLS-compliant interfaces must have only CLS-compliant members", GetSignatureForError ());
}
if ((ModFlags & Modifiers.ABSTRACT) != 0 && Parent.TypeBuilder.IsClass && IsExposedFromAssembly () && Parent.IsClsComplianceRequired ()) {
Report.Warning (3011, 1, Location, "`{0}': only CLS-compliant members can be abstract", GetSignatureForError ());
}
return false;
}
if (GenericMethod != null)
GenericMethod.VerifyClsCompliance ();
return true;
}
public override bool IsUsed
{
get { return IsExplicitImpl || base.IsUsed; }
}
}
public abstract class MethodOrOperator : MethodCore, IMethodData
{
public MethodBuilder MethodBuilder;
ReturnParameter return_attributes;
ListDictionary declarative_security;
protected MethodData MethodData;
static string[] attribute_targets = new string [] { "method", "return" };
protected MethodOrOperator (DeclSpace parent, GenericMethod generic, FullNamedExpression type, int mod,
int allowed_mod, MemberName name,
Attributes attrs, ParametersCompiled parameters)
: base (parent, generic, type, mod, allowed_mod, name,
attrs, parameters)
{
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Target == AttributeTargets.ReturnValue) {
if (return_attributes == null)
return_attributes = new ReturnParameter (MethodBuilder, Location);
return_attributes.ApplyAttributeBuilder (a, cb, pa);
return;
}
if (a.IsInternalMethodImplAttribute) {
is_external_implementation = true;
}
if (a.Type == pa.DllImport) {
const int extern_static = Modifiers.EXTERN | Modifiers.STATIC;
if ((ModFlags & extern_static) != extern_static) {
Report.Error (601, a.Location, "The DllImport attribute must be specified on a method marked `static' and `extern'");
}
is_external_implementation = true;
}
if (a.IsValidSecurityAttribute ()) {
if (declarative_security == null)
declarative_security = new ListDictionary ();
a.ExtractSecurityPermissionSet (declarative_security);
return;
}
if (MethodBuilder != null)
MethodBuilder.SetCustomAttribute (cb);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Method;
}
}
protected override bool CheckForDuplications ()
{
string name = GetFullName (MemberName);
if (MemberName.IsGeneric)
name = MemberName.MakeName (name, MemberName.TypeArguments);
return Parent.MemberCache.CheckExistingMembersOverloads (this, name, Parameters, Report);
}
public virtual EmitContext CreateEmitContext (ILGenerator ig)
{
return new EmitContext (
this, ig, MemberType);
}
protected override bool ResolveMemberType ()
{
#if GMCS_SOURCE
if (GenericMethod != null) {
MethodBuilder = Parent.TypeBuilder.DefineMethod (GetFullName (MemberName), flags);
if (!GenericMethod.Define (this))
return false;
}
#endif
return base.ResolveMemberType ();
}
public override bool Define ()
{
if (!base.Define ())
return false;
if (!CheckBase ())
return false;
if (block != null && block.IsIterator && !(Parent is IteratorStorey)) {
//
// Current method is turned into automatically generated
// wrapper which creates an instance of iterator
//
Iterator.CreateIterator (this, Parent.PartialContainer, ModFlags, Compiler);
ModFlags |= Modifiers.DEBUGGER_HIDDEN;
}
if (IsPartialDefinition) {
caching_flags &= ~Flags.Excluded_Undetected;
caching_flags |= Flags.Excluded;
// Add to member cache only when a partial method implementation is not there
if ((caching_flags & Flags.MethodOverloadsExist) == 0) {
MethodBase mb = new PartialMethodDefinitionInfo (this);
Parent.MemberCache.AddMember (mb, this);
TypeManager.AddMethod (mb, this);
}
return true;
}
MethodData = new MethodData (
this, ModFlags, flags, this, MethodBuilder, GenericMethod, base_method);
if (!MethodData.Define (Parent.PartialContainer, GetFullName (MemberName), Report))
return false;
MethodBuilder = MethodData.MethodBuilder;
if (TypeManager.IsGenericMethod (MethodBuilder))
Parent.MemberCache.AddGenericMember (MethodBuilder, this);
Parent.MemberCache.AddMember (MethodBuilder, this);
return true;
}
protected override void DoMemberTypeIndependentChecks ()
{
base.DoMemberTypeIndependentChecks ();
CheckAbstractAndExtern (block != null);
if ((ModFlags & Modifiers.PARTIAL) != 0) {
for (int i = 0; i < Parameters.Count; ++i) {
IParameterData p = Parameters.FixedParameters [i];
if (p.ModFlags == Parameter.Modifier.OUT) {
Report.Error (752, Location, "`{0}': A partial method parameters cannot use `out' modifier",
GetSignatureForError ());
}
if (p.HasDefaultValue && IsPartialImplementation)
((Parameter) p).Warning_UselessOptionalParameter (Report);
}
}
}
protected override void DoMemberTypeDependentChecks ()
{
base.DoMemberTypeDependentChecks ();
if (!TypeManager.IsGenericParameter (MemberType)) {
if (MemberType.IsAbstract && MemberType.IsSealed) {
Report.Error (722, Location, Error722, TypeManager.CSharpName (MemberType));
}
}
}
public override void Emit ()
{
if ((ModFlags & Modifiers.COMPILER_GENERATED) != 0 && !Parent.IsCompilerGenerated)
PredefinedAttributes.Get.CompilerGenerated.EmitAttribute (MethodBuilder);
if ((ModFlags & Modifiers.DEBUGGER_HIDDEN) != 0)
PredefinedAttributes.Get.DebuggerHidden.EmitAttribute (MethodBuilder);
if (TypeManager.IsDynamicType (ReturnType)) {
return_attributes = new ReturnParameter (MethodBuilder, Location);
return_attributes.EmitPredefined (PredefinedAttributes.Get.Dynamic, Location);
}
if (OptAttributes != null)
OptAttributes.Emit ();
if (declarative_security != null) {
foreach (DictionaryEntry de in declarative_security) {
MethodBuilder.AddDeclarativeSecurity ((SecurityAction)de.Key, (PermissionSet)de.Value);
}
}
if (MethodData != null)
MethodData.Emit (Parent);
base.Emit ();
Block = null;
MethodData = null;
}
protected void Error_ConditionalAttributeIsNotValid ()
{
Report.Error (577, Location,
"Conditional not valid on `{0}' because it is a constructor, destructor, operator or explicit interface implementation",
GetSignatureForError ());
}
public bool IsPartialDefinition {
get {
return (ModFlags & Modifiers.PARTIAL) != 0 && Block == null;
}
}
public bool IsPartialImplementation {
get {
return (ModFlags & Modifiers.PARTIAL) != 0 && Block != null;
}
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
#region IMethodData Members
public Type ReturnType {
get {
return MemberType;
}
}
public MemberName MethodName {
get {
return MemberName;
}
}
/// <summary>
/// Returns true if method has conditional attribute and the conditions is not defined (method is excluded).
/// </summary>
public bool IsExcluded () {
if ((caching_flags & Flags.Excluded_Undetected) == 0)
return (caching_flags & Flags.Excluded) != 0;
caching_flags &= ~Flags.Excluded_Undetected;
if (base_method == null) {
if (OptAttributes == null)
return false;
Attribute[] attrs = OptAttributes.SearchMulti (PredefinedAttributes.Get.Conditional);
if (attrs == null)
return false;
foreach (Attribute a in attrs) {
string condition = a.GetConditionalAttributeValue ();
if (condition == null)
return false;
if (Location.CompilationUnit.IsConditionalDefined (condition))
return false;
}
caching_flags |= Flags.Excluded;
return true;
}
IMethodData md = TypeManager.GetMethod (TypeManager.DropGenericMethodArguments (base_method));
if (md == null) {
if (AttributeTester.IsConditionalMethodExcluded (base_method, Location)) {
caching_flags |= Flags.Excluded;
return true;
}
return false;
}
if (md.IsExcluded ()) {
caching_flags |= Flags.Excluded;
return true;
}
return false;
}
GenericMethod IMethodData.GenericMethod {
get {
return GenericMethod;
}
}
public virtual void EmitExtraSymbolInfo (SourceMethod source)
{ }
#endregion
}
public class SourceMethod : IMethodDef
{
MethodBase method;
SourceMethodBuilder builder;
protected SourceMethod (DeclSpace parent, MethodBase method, ICompileUnit file)
{
this.method = method;
builder = SymbolWriter.OpenMethod (file, parent.NamespaceEntry.SymbolFileID, this);
}
public string Name {
get { return method.Name; }
}
public int Token {
get {
if (method is MethodBuilder)
return ((MethodBuilder) method).GetToken ().Token;
else if (method is ConstructorBuilder)
return ((ConstructorBuilder) method).GetToken ().Token;
else
throw new NotSupportedException ();
}
}
public void CloseMethod ()
{
SymbolWriter.CloseMethod ();
}
public void SetRealMethodName (string name)
{
if (builder != null)
builder.SetRealMethodName (name);
}
public static SourceMethod Create (DeclSpace parent, MethodBase method, Block block)
{
if (!SymbolWriter.HasSymbolWriter)
return null;
if (block == null)
return null;
Location start_loc = block.StartLocation;
if (start_loc.IsNull)
return null;
ICompileUnit compile_unit = start_loc.CompilationUnit;
if (compile_unit == null)
return null;
return new SourceMethod (parent, method, compile_unit);
}
}
public class Method : MethodOrOperator {
/// <summary>
/// Modifiers allowed in a class declaration
/// </summary>
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.STATIC |
Modifiers.VIRTUAL |
Modifiers.SEALED |
Modifiers.OVERRIDE |
Modifiers.ABSTRACT |
Modifiers.UNSAFE |
Modifiers.EXTERN;
const int AllowedInterfaceModifiers =
Modifiers.NEW | Modifiers.UNSAFE;
Method partialMethodImplementation;
public Method (DeclSpace parent, GenericMethod generic,
FullNamedExpression return_type, int mod,
MemberName name, ParametersCompiled parameters, Attributes attrs)
: base (parent, generic, return_type, mod,
parent.PartialContainer.Kind == Kind.Interface ? AllowedInterfaceModifiers : AllowedModifiers,
name, attrs, parameters)
{
}
protected Method (DeclSpace parent, FullNamedExpression return_type, int mod, int amod,
MemberName name, ParametersCompiled parameters, Attributes attrs)
: base (parent, null, return_type, mod, amod, name, attrs, parameters)
{
}
public override string GetSignatureForError()
{
return base.GetSignatureForError () + Parameters.GetSignatureForError ();
}
void Error_DuplicateEntryPoint (Method b)
{
Report.Error (17, b.Location,
"Program `{0}' has more than one entry point defined: `{1}'",
CodeGen.FileName, b.GetSignatureForError ());
}
bool IsEntryPoint ()
{
if (ReturnType != TypeManager.void_type &&
ReturnType != TypeManager.int32_type)
return false;
if (Parameters.Count == 0)
return true;
if (Parameters.Count > 1)
return false;
Type t = Parameters.Types [0];
return t.IsArray && t.GetArrayRank () == 1 &&
TypeManager.GetElementType (t) == TypeManager.string_type &&
(Parameters[0].ModFlags & ~Parameter.Modifier.PARAMS) == Parameter.Modifier.NONE;
}
public override FullNamedExpression LookupNamespaceOrType (string name, Location loc, bool ignore_cs0104)
{
TypeParameter[] tp = CurrentTypeParameters;
if (tp != null) {
TypeParameter t = TypeParameter.FindTypeParameter (tp, name);
if (t != null)
return new TypeParameterExpr (t, loc);
}
return base.LookupNamespaceOrType (name, loc, ignore_cs0104);
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.Conditional) {
if (IsExplicitImpl) {
Error_ConditionalAttributeIsNotValid ();
return;
}
if (ReturnType != TypeManager.void_type) {
Report.Error (578, Location, "Conditional not valid on `{0}' because its return type is not void", GetSignatureForError ());
return;
}
if ((ModFlags & Modifiers.OVERRIDE) != 0) {
Report.Error (243, Location, "Conditional not valid on `{0}' because it is an override method", GetSignatureForError ());
return;
}
if (IsInterface) {
Report.Error (582, Location, "Conditional not valid on interface members");
return;
}
if (MethodData.implementing != null) {
Report.SymbolRelatedToPreviousError (MethodData.implementing.DeclaringType);
Report.Error (629, Location, "Conditional member `{0}' cannot implement interface member `{1}'",
GetSignatureForError (), TypeManager.CSharpSignature (MethodData.implementing));
return;
}
for (int i = 0; i < Parameters.Count; ++i) {
if (Parameters.FixedParameters [i].ModFlags == Parameter.Modifier.OUT) {
Report.Error (685, Location, "Conditional method `{0}' cannot have an out parameter", GetSignatureForError ());
return;
}
}
}
if (a.Type == pa.Extension) {
a.Error_MisusedExtensionAttribute ();
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
protected override bool CheckForDuplications ()
{
if (!base.CheckForDuplications ())
return false;
ArrayList ar = Parent.PartialContainer.Properties;
if (ar != null) {
for (int i = 0; i < ar.Count; ++i) {
PropertyBase pb = (PropertyBase) ar [i];
if (pb.AreAccessorsDuplicateImplementation (this))
return false;
}
}
ar = Parent.PartialContainer.Indexers;
if (ar != null) {
for (int i = 0; i < ar.Count; ++i) {
PropertyBase pb = (PropertyBase) ar [i];
if (pb.AreAccessorsDuplicateImplementation (this))
return false;
}
}
return true;
}
protected override bool CheckBase ()
{
if (!base.CheckBase ())
return false;
if (base_method != null && (ModFlags & Modifiers.OVERRIDE) != 0 && Name == Destructor.MetadataName) {
Report.Error (249, Location, "Do not override `{0}'. Use destructor syntax instead",
TypeManager.CSharpSignature (base_method));
}
return true;
}
public override TypeParameter[] CurrentTypeParameters {
get {
if (GenericMethod != null)
return GenericMethod.CurrentTypeParameters;
return null;
}
}
//
// Creates the type
//
public override bool Define ()
{
if (type_name == TypeManager.system_void_expr && Parameters.IsEmpty && Name == Destructor.MetadataName) {
Report.Warning (465, 1, Location, "Introducing `Finalize' method can interfere with destructor invocation. Did you intend to declare a destructor?");
}
if (!base.Define ())
return false;
if (partialMethodImplementation != null && IsPartialDefinition)
MethodBuilder = partialMethodImplementation.MethodBuilder;
if (RootContext.StdLib && TypeManager.IsSpecialType (ReturnType)) {
Error1599 (Location, ReturnType, Report);
return false;
}
if (base_method != null && (ModFlags & Modifiers.NEW) == 0) {
if (Parameters.Count == 1 && ParameterTypes [0] == TypeManager.object_type && Name == "Equals")
Parent.PartialContainer.Mark_HasEquals ();
else if (Parameters.IsEmpty && Name == "GetHashCode")
Parent.PartialContainer.Mark_HasGetHashCode ();
}
if ((ModFlags & Modifiers.STATIC) == 0)
return true;
if (Parameters.HasExtensionMethodType) {
if (Parent.PartialContainer.IsStaticClass && !Parent.IsGeneric) {
if (!Parent.IsTopLevel)
Report.Error (1109, Location, "`{0}': Extension methods cannot be defined in a nested class",
GetSignatureForError ());
PredefinedAttribute pa = PredefinedAttributes.Get.Extension;
if (!pa.IsDefined) {
Report.Error (1110, Location,
"`{0}': Extension methods cannot be declared without a reference to System.Core.dll assembly. Add the assembly reference or remove `this' modifer from the first parameter",
GetSignatureForError ());
}
ModFlags |= Modifiers.METHOD_EXTENSION;
Parent.PartialContainer.ModFlags |= Modifiers.METHOD_EXTENSION;
CodeGen.Assembly.HasExtensionMethods = true;
} else {
Report.Error (1106, Location, "`{0}': Extension methods must be defined in a non-generic static class",
GetSignatureForError ());
}
}
//
// This is used to track the Entry Point,
//
if (RootContext.NeedsEntryPoint &&
Name == "Main" &&
(RootContext.MainClass == null ||
RootContext.MainClass == Parent.TypeBuilder.FullName)){
if (IsEntryPoint ()) {
if (RootContext.EntryPoint == null) {
if (Parent.IsGeneric || MemberName.IsGeneric) {
Report.Warning (402, 4, Location, "`{0}': an entry point cannot be generic or in a generic type",
GetSignatureForError ());
} else {
SetMemberIsUsed ();
RootContext.EntryPoint = this;
}
} else {
Error_DuplicateEntryPoint (RootContext.EntryPoint);
Error_DuplicateEntryPoint (this);
}
} else {
Report.Warning (28, 4, Location, "`{0}' has the wrong signature to be an entry point",
GetSignatureForError ());
}
}
return true;
}
//
// Emits the code
//
public override void Emit ()
{
try {
Report.Debug (64, "METHOD EMIT", this, MethodBuilder, Location, Block, MethodData);
if (IsPartialDefinition) {
//
// Use partial method implementation builder for partial method declaration attributes
//
if (partialMethodImplementation != null) {
MethodBuilder = partialMethodImplementation.MethodBuilder;
return;
}
} else if ((ModFlags & Modifiers.PARTIAL) != 0 && (caching_flags & Flags.PartialDefinitionExists) == 0) {
Report.Error (759, Location, "A partial method `{0}' implementation is missing a partial method declaration",
GetSignatureForError ());
}
base.Emit ();
if ((ModFlags & Modifiers.METHOD_EXTENSION) != 0)
PredefinedAttributes.Get.Extension.EmitAttribute (MethodBuilder);
} catch {
Console.WriteLine ("Internal compiler error at {0}: exception caught while emitting {1}",
Location, MethodBuilder);
throw;
}
}
public override bool EnableOverloadChecks (MemberCore overload)
{
// TODO: It can be deleted when members will be defined in correct order
if (overload is Operator)
return overload.EnableOverloadChecks (this);
if (overload is Indexer)
return false;
return base.EnableOverloadChecks (overload);
}
public static void Error1599 (Location loc, Type t, Report Report)
{
Report.Error (1599, loc, "Method or delegate cannot return type `{0}'", TypeManager.CSharpName (t));
}
protected override MethodInfo FindOutBaseMethod (ref Type base_ret_type)
{
MethodInfo mi = (MethodInfo) Parent.PartialContainer.BaseCache.FindMemberToOverride (
Parent.TypeBuilder, Name, Parameters, GenericMethod, false);
if (mi == null)
return null;
if (mi.IsSpecialName)
return null;
base_ret_type = TypeManager.TypeToCoreType (mi.ReturnType);
return mi;
}
public void SetPartialDefinition (Method methodDefinition)
{
caching_flags |= Flags.PartialDefinitionExists;
methodDefinition.partialMethodImplementation = this;
for (int i = 0; i < methodDefinition.Parameters.Count; ++i ) {
Parameters [i].DefaultValue = methodDefinition.Parameters [i].DefaultValue;
}
if (methodDefinition.attributes == null)
return;
if (attributes == null) {
attributes = methodDefinition.attributes;
} else {
attributes.Attrs.AddRange (methodDefinition.attributes.Attrs);
}
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
if (!Parameters.IsEmpty) {
ArrayList al = (ArrayList)Parent.PartialContainer.MemberCache.Members [Name];
if (al.Count > 1)
MemberCache.VerifyClsParameterConflict (al, this, MethodBuilder, Report);
}
return true;
}
}
public abstract class ConstructorInitializer : ExpressionStatement
{
Arguments argument_list;
MethodGroupExpr base_constructor_group;
public ConstructorInitializer (Arguments argument_list, Location loc)
{
this.argument_list = argument_list;
this.loc = loc;
}
public Arguments Arguments {
get {
return argument_list;
}
}
public override Expression CreateExpressionTree (ResolveContext ec)
{
throw new NotSupportedException ("ET");
}
public override Expression DoResolve (ResolveContext ec)
{
eclass = ExprClass.Value;
// TODO: ec.GetSignatureForError ()
ConstructorBuilder caller_builder = ((Constructor) ec.MemberContext).ConstructorBuilder;
if (argument_list != null) {
bool dynamic;
//
// Spec mandates that constructor initializer will not have `this' access
//
using (ec.Set (ResolveContext.Options.BaseInitializer)) {
argument_list.Resolve (ec, out dynamic);
}
if (dynamic) {
SimpleName ctor = new SimpleName (ConstructorBuilder.ConstructorName, loc);
return new DynamicInvocation (ctor, argument_list, loc).Resolve (ec) as ExpressionStatement;
}
}
type = ec.CurrentType;
if (this is ConstructorBaseInitializer) {
if (ec.CurrentType.BaseType == null)
return this;
type = ec.CurrentType.BaseType;
if (TypeManager.IsStruct (ec.CurrentType)) {
ec.Report.Error (522, loc,
"`{0}': Struct constructors cannot call base constructors", TypeManager.CSharpSignature (caller_builder));
return this;
}
} else {
//
// It is legal to have "this" initializers that take no arguments
// in structs, they are just no-ops.
//
// struct D { public D (int a) : this () {}
//
if (TypeManager.IsStruct (ec.CurrentType) && argument_list == null)
return this;
}
base_constructor_group = MemberLookupFinal (
ec, null, type, ConstructorBuilder.ConstructorName, MemberTypes.Constructor,
BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly,
loc) as MethodGroupExpr;
if (base_constructor_group == null)
return this;
base_constructor_group = base_constructor_group.OverloadResolve (
ec, ref argument_list, false, loc);
if (base_constructor_group == null)
return this;
if (!ec.IsStatic)
base_constructor_group.InstanceExpression = ec.GetThis (loc);
ConstructorInfo base_ctor = (ConstructorInfo)base_constructor_group;
if (base_ctor == caller_builder){
ec.Report.Error (516, loc, "Constructor `{0}' cannot call itself", TypeManager.CSharpSignature (caller_builder));
}
return this;
}
public override void Emit (EmitContext ec)
{
// It can be null for static initializers
if (base_constructor_group == null)
return;
ec.Mark (loc);
base_constructor_group.EmitCall (ec, argument_list);
}
public override void EmitStatement (EmitContext ec)
{
Emit (ec);
}
}
public class ConstructorBaseInitializer : ConstructorInitializer {
public ConstructorBaseInitializer (Arguments argument_list, Location l) :
base (argument_list, l)
{
}
}
class GeneratedBaseInitializer: ConstructorBaseInitializer {
public GeneratedBaseInitializer (Location loc):
base (null, loc)
{
}
}
public class ConstructorThisInitializer : ConstructorInitializer {
public ConstructorThisInitializer (Arguments argument_list, Location l) :
base (argument_list, l)
{
}
}
public class Constructor : MethodCore, IMethodData {
public ConstructorBuilder ConstructorBuilder;
public ConstructorInitializer Initializer;
ListDictionary declarative_security;
bool has_compliant_args;
// <summary>
// Modifiers allowed for a constructor.
// </summary>
public const int AllowedModifiers =
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.STATIC |
Modifiers.UNSAFE |
Modifiers.EXTERN |
Modifiers.PRIVATE;
static readonly string[] attribute_targets = new string [] { "method" };
//
// The spec claims that static is not permitted, but
// my very own code has static constructors.
//
public Constructor (DeclSpace parent, string name, int mod, Attributes attrs, ParametersCompiled args,
ConstructorInitializer init, Location loc)
: base (parent, null, null, mod, AllowedModifiers,
new MemberName (name, loc), attrs, args)
{
Initializer = init;
}
public bool HasCompliantArgs {
get { return has_compliant_args; }
}
public override AttributeTargets AttributeTargets {
get { return AttributeTargets.Constructor; }
}
//
// Returns true if this is a default constructor
//
public bool IsDefault ()
{
if ((ModFlags & Modifiers.STATIC) != 0)
return Parameters.IsEmpty;
return Parameters.IsEmpty &&
(Initializer is ConstructorBaseInitializer) &&
(Initializer.Arguments == null);
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.IsValidSecurityAttribute ()) {
if (declarative_security == null) {
declarative_security = new ListDictionary ();
}
a.ExtractSecurityPermissionSet (declarative_security);
return;
}
if (a.IsInternalMethodImplAttribute) {
is_external_implementation = true;
}
ConstructorBuilder.SetCustomAttribute (cb);
}
protected override bool CheckBase ()
{
if ((ModFlags & Modifiers.STATIC) != 0) {
if (!Parameters.IsEmpty) {
Report.Error (132, Location, "`{0}': The static constructor must be parameterless",
GetSignatureForError ());
return false;
}
// the rest can be ignored
return true;
}
// Check whether arguments were correct.
if (!DefineParameters (Parameters))
return false;
if ((caching_flags & Flags.MethodOverloadsExist) != 0)
Parent.MemberCache.CheckExistingMembersOverloads (this, ConstructorInfo.ConstructorName,
Parameters, Report);
if (Parent.PartialContainer.Kind == Kind.Struct) {
if (Parameters.Count == 0) {
Report.Error (568, Location,
"Structs cannot contain explicit parameterless constructors");
return false;
}
}
CheckProtectedModifier ();
return true;
}
//
// Creates the ConstructorBuilder
//
public override bool Define ()
{
if (ConstructorBuilder != null)
return true;
MethodAttributes ca = (MethodAttributes.RTSpecialName |
MethodAttributes.SpecialName);
if ((ModFlags & Modifiers.STATIC) != 0) {
ca |= MethodAttributes.Static | MethodAttributes.Private;
} else {
ca |= MethodAttributes.HideBySig;
if ((ModFlags & Modifiers.PUBLIC) != 0)
ca |= MethodAttributes.Public;
else if ((ModFlags & Modifiers.PROTECTED) != 0){
if ((ModFlags & Modifiers.INTERNAL) != 0)
ca |= MethodAttributes.FamORAssem;
else
ca |= MethodAttributes.Family;
} else if ((ModFlags & Modifiers.INTERNAL) != 0)
ca |= MethodAttributes.Assembly;
else
ca |= MethodAttributes.Private;
}
if (!CheckAbstractAndExtern (block != null))
return false;
// Check if arguments were correct.
if (!CheckBase ())
return false;
ConstructorBuilder = Parent.TypeBuilder.DefineConstructor (
ca, CallingConventions,
Parameters.GetEmitTypes ());
if (Parent.PartialContainer.IsComImport) {
if (!IsDefault ()) {
Report.Error (669, Location, "`{0}': A class with the ComImport attribute cannot have a user-defined constructor",
Parent.GetSignatureForError ());
}
ConstructorBuilder.SetImplementationFlags (MethodImplAttributes.InternalCall);
}
Parent.MemberCache.AddMember (ConstructorBuilder, this);
TypeManager.AddMethod (ConstructorBuilder, this);
// It's here only to report an error
if (block != null && block.IsIterator) {
member_type = TypeManager.void_type;
Iterator.CreateIterator (this, Parent.PartialContainer, ModFlags, Compiler);
}
return true;
}
//
// Emits the code
//
public override void Emit ()
{
if ((ModFlags & Modifiers.DEBUGGER_HIDDEN) != 0)
PredefinedAttributes.Get.DebuggerHidden.EmitAttribute (ConstructorBuilder);
if (OptAttributes != null)
OptAttributes.Emit ();
base.Emit ();
//
// If we use a "this (...)" constructor initializer, then
// do not emit field initializers, they are initialized in the other constructor
//
bool emit_field_initializers = ((ModFlags & Modifiers.STATIC) != 0) ||
!(Initializer is ConstructorThisInitializer);
BlockContext bc = new BlockContext (this, block, TypeManager.void_type);
bc.Set (ResolveContext.Options.ConstructorScope);
if (emit_field_initializers)
Parent.PartialContainer.ResolveFieldInitializers (bc);
if (block != null) {
// If this is a non-static `struct' constructor and doesn't have any
// initializer, it must initialize all of the struct's fields.
if ((Parent.PartialContainer.Kind == Kind.Struct) &&
((ModFlags & Modifiers.STATIC) == 0) && (Initializer == null))
block.AddThisVariable (Parent, Location);
if (block != null && (ModFlags & Modifiers.STATIC) == 0){
if (Parent.PartialContainer.Kind == Kind.Class && Initializer == null)
Initializer = new GeneratedBaseInitializer (Location);
if (Initializer != null) {
block.AddScopeStatement (new StatementExpression (Initializer));
}
}
}
Parameters.ApplyAttributes (ConstructorBuilder);
SourceMethod source = SourceMethod.Create (Parent, ConstructorBuilder, block);
if (block != null) {
if (block.Resolve (null, bc, Parameters, this)) {
EmitContext ec = new EmitContext (this, ConstructorBuilder.GetILGenerator (), bc.ReturnType);
ec.With (EmitContext.Options.ConstructorScope, true);
if (!ec.HasReturnLabel && bc.HasReturnLabel) {
ec.ReturnLabel = bc.ReturnLabel;
ec.HasReturnLabel = true;
}
block.Emit (ec);
}
}
if (source != null)
source.CloseMethod ();
if (declarative_security != null) {
foreach (DictionaryEntry de in declarative_security) {
ConstructorBuilder.AddDeclarativeSecurity ((SecurityAction)de.Key, (PermissionSet)de.Value);
}
}
block = null;
}
// Is never override
protected override MethodInfo FindOutBaseMethod (ref Type base_ret_type)
{
return null;
}
public override string GetSignatureForError()
{
return base.GetSignatureForError () + Parameters.GetSignatureForError ();
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance () || !IsExposedFromAssembly ()) {
return false;
}
if (!Parameters.IsEmpty) {
ArrayList al = (ArrayList)Parent.MemberCache.Members [ConstructorInfo.ConstructorName];
if (al.Count > 2)
MemberCache.VerifyClsParameterConflict (al, this, ConstructorBuilder, Report);
if (TypeManager.IsSubclassOf (Parent.TypeBuilder, TypeManager.attribute_type)) {
foreach (Type param in Parameters.Types) {
if (param.IsArray) {
return true;
}
}
}
}
has_compliant_args = true;
return true;
}
#region IMethodData Members
public MemberName MethodName {
get {
return MemberName;
}
}
public Type ReturnType {
get {
return MemberType;
}
}
public EmitContext CreateEmitContext (ILGenerator ig)
{
throw new NotImplementedException ();
}
public bool IsExcluded()
{
return false;
}
GenericMethod IMethodData.GenericMethod {
get {
return null;
}
}
void IMethodData.EmitExtraSymbolInfo (SourceMethod source)
{ }
#endregion
}
/// <summary>
/// Interface for MethodData class. Holds links to parent members to avoid member duplication.
/// </summary>
public interface IMethodData
{
CallingConventions CallingConventions { get; }
Location Location { get; }
MemberName MethodName { get; }
Type ReturnType { get; }
GenericMethod GenericMethod { get; }
ParametersCompiled ParameterInfo { get; }
Attributes OptAttributes { get; }
ToplevelBlock Block { get; set; }
EmitContext CreateEmitContext (ILGenerator ig);
ObsoleteAttribute GetObsoleteAttribute ();
string GetSignatureForError ();
bool IsExcluded ();
bool IsClsComplianceRequired ();
void SetMemberIsUsed ();
void EmitExtraSymbolInfo (SourceMethod source);
}
//
// Encapsulates most of the Method's state
//
public class MethodData {
static FieldInfo methodbuilder_attrs_field;
public readonly IMethodData method;
public readonly GenericMethod GenericMethod;
//
// Are we implementing an interface ?
//
public MethodInfo implementing;
//
// Protected data.
//
protected InterfaceMemberBase member;
protected int modifiers;
protected MethodAttributes flags;
protected Type declaring_type;
protected MethodInfo parent_method;
MethodBuilder builder = null;
public MethodBuilder MethodBuilder {
get {
return builder;
}
}
public Type DeclaringType {
get {
return declaring_type;
}
}
public MethodData (InterfaceMemberBase member,
int modifiers, MethodAttributes flags, IMethodData method)
{
this.member = member;
this.modifiers = modifiers;
this.flags = flags;
this.method = method;
}
public MethodData (InterfaceMemberBase member,
int modifiers, MethodAttributes flags,
IMethodData method, MethodBuilder builder,
GenericMethod generic, MethodInfo parent_method)
: this (member, modifiers, flags, method)
{
this.builder = builder;
this.GenericMethod = generic;
this.parent_method = parent_method;
}
public bool Define (DeclSpace parent, string method_full_name, Report Report)
{
string name = method.MethodName.Basename;
TypeContainer container = parent.PartialContainer;
PendingImplementation pending = container.PendingImplementations;
if (pending != null){
implementing = pending.IsInterfaceMethod (name, member.InterfaceType, this);
if (member.InterfaceType != null){
if (implementing == null){
if (member is PropertyBase) {
Report.Error (550, method.Location, "`{0}' is an accessor not found in interface member `{1}{2}'",
method.GetSignatureForError (), TypeManager.CSharpName (member.InterfaceType),
member.GetSignatureForError ().Substring (member.GetSignatureForError ().LastIndexOf ('.')));
} else {
Report.Error (539, method.Location,
"`{0}.{1}' in explicit interface declaration is not a member of interface",
TypeManager.CSharpName (member.InterfaceType), member.ShortName);
}
return false;
}
if (implementing.IsSpecialName && !(method is AbstractPropertyEventMethod)) {
Report.SymbolRelatedToPreviousError (implementing);
Report.Error (683, method.Location, "`{0}' explicit method implementation cannot implement `{1}' because it is an accessor",
member.GetSignatureForError (), TypeManager.CSharpSignature (implementing));
return false;
}
} else {
if (implementing != null) {
AbstractPropertyEventMethod prop_method = method as AbstractPropertyEventMethod;
if (prop_method == null) {
if (TypeManager.IsSpecialMethod (implementing)) {
Report.SymbolRelatedToPreviousError (implementing);
Report.Error (470, method.Location, "Method `{0}' cannot implement interface accessor `{1}.{2}'",
method.GetSignatureForError (), TypeManager.CSharpSignature (implementing),
implementing.Name.StartsWith ("get_") ? "get" : "set");
}
} else if (implementing.DeclaringType.IsInterface) {
if (!implementing.IsSpecialName) {
Report.SymbolRelatedToPreviousError (implementing);
Report.Error (686, method.Location, "Accessor `{0}' cannot implement interface member `{1}' for type `{2}'. Use an explicit interface implementation",
method.GetSignatureForError (), TypeManager.CSharpSignature (implementing), container.GetSignatureForError ());
return false;
}
PropertyBase.PropertyMethod pm = prop_method as PropertyBase.PropertyMethod;
if (pm != null && pm.HasCustomAccessModifier && (pm.ModFlags & Modifiers.PUBLIC) == 0) {
Report.SymbolRelatedToPreviousError (implementing);
Report.Error (277, method.Location, "Accessor `{0}' must be declared public to implement interface member `{1}'",
method.GetSignatureForError (), TypeManager.CSharpSignature (implementing, true));
return false;
}
}
}
}
}
//
// For implicit implementations, make sure we are public, for
// explicit implementations, make sure we are private.
//
if (implementing != null){
//
// Setting null inside this block will trigger a more
// verbose error reporting for missing interface implementations
//
// The "candidate" function has been flagged already
// but it wont get cleared
//
if (member.IsExplicitImpl){
if (method.ParameterInfo.HasParams && !TypeManager.GetParameterData (implementing).HasParams) {
Report.SymbolRelatedToPreviousError (implementing);
Report.Error (466, method.Location, "`{0}': the explicit interface implementation cannot introduce the params modifier",
method.GetSignatureForError ());
return false;
}
} else {
if (implementing.DeclaringType.IsInterface) {
//
// If this is an interface method implementation,
// check for public accessibility
//
if ((flags & MethodAttributes.MemberAccessMask) != MethodAttributes.Public)
{
implementing = null;
}
} else if ((flags & MethodAttributes.MemberAccessMask) == MethodAttributes.Private){
// We may never be private.
implementing = null;
} else if ((modifiers & Modifiers.OVERRIDE) == 0){
//
// We may be protected if we're overriding something.
//
implementing = null;
}
}
//
// Static is not allowed
//
if ((modifiers & Modifiers.STATIC) != 0){
implementing = null;
}
}
//
// If implementing is still valid, set flags
//
if (implementing != null){
//
// When implementing interface methods, set NewSlot
// unless, we are overwriting a method.
//
if (implementing.DeclaringType.IsInterface){
if ((modifiers & Modifiers.OVERRIDE) == 0)
flags |= MethodAttributes.NewSlot;
}
flags |=
MethodAttributes.Virtual |
MethodAttributes.HideBySig;
// Set Final unless we're virtual, abstract or already overriding a method.
if ((modifiers & (Modifiers.VIRTUAL | Modifiers.ABSTRACT | Modifiers.OVERRIDE)) == 0)
flags |= MethodAttributes.Final;
}
DefineMethodBuilder (container, method_full_name, method.ParameterInfo);
if (builder == null)
return false;
if (container.CurrentType != null)
declaring_type = container.CurrentType;
else
declaring_type = container.TypeBuilder;
if (implementing != null && member.IsExplicitImpl) {
container.TypeBuilder.DefineMethodOverride (builder, implementing);
}
TypeManager.AddMethod (builder, method);
if (GenericMethod != null) {
bool is_override = member.IsExplicitImpl |
((modifiers & Modifiers.OVERRIDE) != 0);
if (implementing != null)
parent_method = implementing;
if (!GenericMethod.DefineType (GenericMethod, builder, parent_method, is_override))
return false;
}
return true;
}
/// <summary>
/// Create the MethodBuilder for the method
/// </summary>
void DefineMethodBuilder (TypeContainer container, string method_name, ParametersCompiled param)
{
if (builder == null) {
builder = container.TypeBuilder.DefineMethod (
method_name, flags, method.CallingConventions,
TypeManager.TypeToReflectionType (method.ReturnType),
param.GetEmitTypes ());
return;
}
#if GMCS_SOURCE
//
// Generic method has been already defined to resolve method parameters
// correctly when they use type parameters
//
builder.SetParameters (param.GetEmitTypes ());
builder.SetReturnType (method.ReturnType);
#endif
if (builder.Attributes != flags) {
try {
if (methodbuilder_attrs_field == null)
methodbuilder_attrs_field = typeof (MethodBuilder).GetField ("attrs", BindingFlags.NonPublic | BindingFlags.Instance);
methodbuilder_attrs_field.SetValue (builder, flags);
} catch {
RootContext.ToplevelTypes.Compiler.Report.RuntimeMissingSupport (method.Location, "Generic method MethodAttributes");
}
}
}
//
// Emits the code
//
public void Emit (DeclSpace parent)
{
method.ParameterInfo.ApplyAttributes (MethodBuilder);
if (GenericMethod != null)
GenericMethod.EmitAttributes ();
//
// clear the pending implementation flag
//
if (implementing != null)
parent.PartialContainer.PendingImplementations.ImplementMethod (method.MethodName.Basename,
member.InterfaceType, this, member.IsExplicitImpl);
SourceMethod source = SourceMethod.Create (parent, MethodBuilder, method.Block);
ToplevelBlock block = method.Block;
if (block != null) {
BlockContext bc = new BlockContext ((IMemberContext) method, block, method.ReturnType);
if (block.Resolve (null, bc, method.ParameterInfo, method)) {
EmitContext ec = method.CreateEmitContext (MethodBuilder.GetILGenerator ());
if (!ec.HasReturnLabel && bc.HasReturnLabel) {
ec.ReturnLabel = bc.ReturnLabel;
ec.HasReturnLabel = true;
}
block.Emit (ec);
}
}
if (source != null) {
method.EmitExtraSymbolInfo (source);
source.CloseMethod ();
}
}
}
public class Destructor : MethodOrOperator
{
const int AllowedModifiers =
Modifiers.UNSAFE |
Modifiers.EXTERN;
static readonly string[] attribute_targets = new string [] { "method" };
public static readonly string MetadataName = "Finalize";
public Destructor (DeclSpace parent, int mod, ParametersCompiled parameters, Attributes attrs, Location l)
: base (parent, null, TypeManager.system_void_expr, mod, AllowedModifiers,
new MemberName (MetadataName, l), attrs, parameters)
{
ModFlags &= ~Modifiers.PRIVATE;
ModFlags |= Modifiers.PROTECTED;
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.Conditional) {
Error_ConditionalAttributeIsNotValid ();
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
protected override bool CheckBase ()
{
flags |= MethodAttributes.Virtual;
if (!base.CheckBase ())
return false;
if (Parent.PartialContainer.BaseCache == null)
return true;
Type base_type = Parent.PartialContainer.BaseCache.Container.Type;
if (base_type != null && Block != null) {
MethodGroupExpr method_expr = Expression.MethodLookup (Parent.Module.Compiler, Parent.TypeBuilder, base_type, MetadataName, Location);
if (method_expr == null)
throw new NotImplementedException ();
method_expr.IsBase = true;
method_expr.InstanceExpression = new CompilerGeneratedThis (Parent.TypeBuilder, Location);
ToplevelBlock new_block = new ToplevelBlock (Compiler, Block.StartLocation);
new_block.EndLocation = Block.EndLocation;
Block finaly_block = new ExplicitBlock (new_block, Location, Location);
Block try_block = new Block (new_block, block);
//
// 0-size arguments to avoid CS0250 error
// TODO: Should use AddScopeStatement or something else which emits correct
// debugger scope
//
finaly_block.AddStatement (new StatementExpression (new Invocation (method_expr, new Arguments (0))));
new_block.AddStatement (new TryFinally (try_block, finaly_block, Location));
block = new_block;
}
return true;
}
public override string GetSignatureForError ()
{
return Parent.GetSignatureForError () + ".~" + Parent.MemberName.Name + "()";
}
protected override MethodInfo FindOutBaseMethod (ref Type base_ret_type)
{
return null;
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
}
public abstract class MemberBase : MemberCore
{
protected FullNamedExpression type_name;
protected Type member_type;
public readonly DeclSpace ds;
public readonly GenericMethod GenericMethod;
protected MemberBase (DeclSpace parent, GenericMethod generic,
FullNamedExpression type, int mod, int allowed_mod, int def_mod,
MemberName name, Attributes attrs)
: base (parent, name, attrs)
{
this.ds = generic != null ? generic : (DeclSpace) parent;
this.type_name = type;
ModFlags = Modifiers.Check (allowed_mod, mod, def_mod, Location, Report);
GenericMethod = generic;
if (GenericMethod != null)
GenericMethod.ModFlags = ModFlags;
}
//
// Main member define entry
//
public override bool Define ()
{
DoMemberTypeIndependentChecks ();
//
// Returns false only when type resolution failed
//
if (!ResolveMemberType ())
return false;
DoMemberTypeDependentChecks ();
return true;
}
//
// Any type_name independent checks
//
protected virtual void DoMemberTypeIndependentChecks ()
{
if ((Parent.ModFlags & Modifiers.SEALED) != 0 &&
(ModFlags & (Modifiers.VIRTUAL | Modifiers.ABSTRACT)) != 0) {
Report.Error (549, Location, "New virtual member `{0}' is declared in a sealed class `{1}'",
GetSignatureForError (), Parent.GetSignatureForError ());
}
}
//
// Any type_name dependent checks
//
protected virtual void DoMemberTypeDependentChecks ()
{
// verify accessibility
if (!IsAccessibleAs (MemberType)) {
Report.SymbolRelatedToPreviousError (MemberType);
if (this is Property)
Report.Error (53, Location,
"Inconsistent accessibility: property type `" +
TypeManager.CSharpName (MemberType) + "' is less " +
"accessible than property `" + GetSignatureForError () + "'");
else if (this is Indexer)
Report.Error (54, Location,
"Inconsistent accessibility: indexer return type `" +
TypeManager.CSharpName (MemberType) + "' is less " +
"accessible than indexer `" + GetSignatureForError () + "'");
else if (this is MethodCore) {
if (this is Operator)
Report.Error (56, Location,
"Inconsistent accessibility: return type `" +
TypeManager.CSharpName (MemberType) + "' is less " +
"accessible than operator `" + GetSignatureForError () + "'");
else
Report.Error (50, Location,
"Inconsistent accessibility: return type `" +
TypeManager.CSharpName (MemberType) + "' is less " +
"accessible than method `" + GetSignatureForError () + "'");
} else {
Report.Error (52, Location,
"Inconsistent accessibility: field type `" +
TypeManager.CSharpName (MemberType) + "' is less " +
"accessible than field `" + GetSignatureForError () + "'");
}
}
Variance variance = this is Event ? Variance.Contravariant : Variance.Covariant;
TypeManager.CheckTypeVariance (MemberType, variance, this);
}
protected bool IsTypePermitted ()
{
if (TypeManager.IsSpecialType (MemberType)) {
Report.Error (610, Location, "Field or property cannot be of type `{0}'", TypeManager.CSharpName (MemberType));
return false;
}
return true;
}
protected virtual bool CheckBase ()
{
CheckProtectedModifier ();
return true;
}
public Type MemberType {
get { return member_type; }
}
protected virtual bool ResolveMemberType ()
{
if (member_type != null)
throw new InternalErrorException ("Multi-resolve");
TypeExpr te = type_name.ResolveAsTypeTerminal (this, false);
if (te == null)
return false;
//
// Replace original type name, error reporting can use fully resolved name
//
type_name = te;
member_type = te.Type;
return true;
}
}
//
// Abstract class for all fields
//
abstract public class FieldBase : MemberBase {
public FieldBuilder FieldBuilder;
public Status status;
protected Expression initializer;
[Flags]
public enum Status : byte {
HAS_OFFSET = 4 // Used by FieldMember.
}
static readonly string[] attribute_targets = new string [] { "field" };
protected FieldBase (DeclSpace parent, FullNamedExpression type, int mod,
int allowed_mod, MemberName name, Attributes attrs)
: base (parent, null, type, mod, allowed_mod | Modifiers.ABSTRACT, Modifiers.PRIVATE,
name, attrs)
{
if ((mod & Modifiers.ABSTRACT) != 0)
Report.Error (681, Location, "The modifier 'abstract' is not valid on fields. Try using a property instead");
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Field;
}
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.FieldOffset) {
status |= Status.HAS_OFFSET;
if (!Parent.PartialContainer.HasExplicitLayout) {
Report.Error (636, Location, "The FieldOffset attribute can only be placed on members of types marked with the StructLayout(LayoutKind.Explicit)");
return;
}
if ((ModFlags & Modifiers.STATIC) != 0 || this is Const) {
Report.Error (637, Location, "The FieldOffset attribute is not allowed on static or const fields");
return;
}
}
#if NET_2_0
if (a.Type == pa.FixedBuffer) {
Report.Error (1716, Location, "Do not use 'System.Runtime.CompilerServices.FixedBuffer' attribute. Use the 'fixed' field modifier instead");
return;
}
#endif
#if !NET_2_0
if (a.Type == pa.MarshalAs) {
UnmanagedMarshal marshal = a.GetMarshal (this);
if (marshal != null) {
FieldBuilder.SetMarshal (marshal);
}
return;
}
#endif
if ((a.HasSecurityAttribute)) {
a.Error_InvalidSecurityParent ();
return;
}
FieldBuilder.SetCustomAttribute (cb);
}
protected override bool CheckBase ()
{
if (!base.CheckBase ())
return false;
MemberInfo conflict_symbol = Parent.PartialContainer.FindBaseMemberWithSameName (Name, false);
if (conflict_symbol == null) {
if ((ModFlags & Modifiers.NEW) != 0) {
Report.Warning (109, 4, Location, "The member `{0}' does not hide an inherited member. The new keyword is not required", GetSignatureForError ());
}
return true;
}
if ((ModFlags & (Modifiers.NEW | Modifiers.OVERRIDE | Modifiers.BACKING_FIELD)) == 0) {
Report.SymbolRelatedToPreviousError (conflict_symbol);
Report.Warning (108, 2, Location, "`{0}' hides inherited member `{1}'. Use the new keyword if hiding was intended",
GetSignatureForError (), TypeManager.GetFullNameSignature (conflict_symbol));
}
return true;
}
protected override void DoMemberTypeDependentChecks ()
{
base.DoMemberTypeDependentChecks ();
if (TypeManager.IsGenericParameter (MemberType))
return;
if (MemberType.IsSealed && MemberType.IsAbstract) {
Error_VariableOfStaticClass (Location, GetSignatureForError (), MemberType, Report);
}
CheckBase ();
IsTypePermitted ();
}
//
// Represents header string for documentation comment.
//
public override string DocCommentHeader {
get { return "F:"; }
}
public override void Emit ()
{
if (TypeManager.IsDynamicType (member_type))
PredefinedAttributes.Get.Dynamic.EmitAttribute (FieldBuilder);
if ((ModFlags & Modifiers.COMPILER_GENERATED) != 0 && !Parent.IsCompilerGenerated)
PredefinedAttributes.Get.CompilerGenerated.EmitAttribute (FieldBuilder);
if (OptAttributes != null) {
OptAttributes.Emit ();
}
if (((status & Status.HAS_OFFSET) == 0) && (ModFlags & (Modifiers.STATIC | Modifiers.BACKING_FIELD)) == 0 && Parent.PartialContainer.HasExplicitLayout) {
Report.Error (625, Location, "`{0}': Instance field types marked with StructLayout(LayoutKind.Explicit) must have a FieldOffset attribute", GetSignatureForError ());
}
base.Emit ();
}
public static void Error_VariableOfStaticClass (Location loc, string variable_name, Type static_class, Report Report)
{
Report.SymbolRelatedToPreviousError (static_class);
Report.Error (723, loc, "`{0}': cannot declare variables of static types",
variable_name);
}
public Expression Initializer {
set {
if (value != null) {
this.initializer = value;
}
}
}
protected virtual bool IsFieldClsCompliant {
get {
if (FieldBuilder == null)
return true;
return AttributeTester.IsClsCompliant (FieldBuilder.FieldType);
}
}
public override string[] ValidAttributeTargets
{
get {
return attribute_targets;
}
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
if (!IsFieldClsCompliant) {
Report.Warning (3003, 1, Location, "Type of `{0}' is not CLS-compliant",
GetSignatureForError ());
}
return true;
}
public void SetAssigned ()
{
caching_flags |= Flags.IsAssigned;
}
}
interface IFixedBuffer
{
FieldInfo Element { get; }
Type ElementType { get; }
}
public class FixedFieldExternal: IFixedBuffer
{
FieldInfo element_field;
public FixedFieldExternal (FieldInfo fi)
{
element_field = fi.FieldType.GetField (FixedField.FixedElementName);
}
#region IFixedField Members
public FieldInfo Element {
get {
return element_field;
}
}
public Type ElementType {
get {
return element_field.FieldType;
}
}
#endregion
}
/// <summary>
/// Fixed buffer implementation
/// </summary>
public class FixedField : FieldBase, IFixedBuffer
{
public const string FixedElementName = "FixedElementField";
static int GlobalCounter = 0;
static object[] ctor_args = new object[] { (short)LayoutKind.Sequential };
static FieldInfo[] fi;
TypeBuilder fixed_buffer_type;
FieldBuilder element;
Expression size_expr;
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.UNSAFE;
public FixedField (DeclSpace parent, FullNamedExpression type, int mod, string name,
Expression size_expr, Attributes attrs, Location loc):
base (parent, type, mod, AllowedModifiers, new MemberName (name, loc), attrs)
{
if (RootContext.Version < LanguageVersion.ISO_2)
Report.FeatureIsNotAvailable (loc, "fixed size buffers");
this.size_expr = size_expr;
}
public override bool Define()
{
if (!base.Define ())
return false;
if (!TypeManager.IsPrimitiveType (MemberType)) {
Report.Error (1663, Location, "`{0}': Fixed size buffers type must be one of the following: bool, byte, short, int, long, char, sbyte, ushort, uint, ulong, float or double",
GetSignatureForError ());
}
// Create nested fixed buffer container
string name = String.Format ("<{0}>__FixedBuffer{1}", Name, GlobalCounter++);
fixed_buffer_type = Parent.TypeBuilder.DefineNestedType (name, Parent.Module.DefaultCharSetType |
TypeAttributes.NestedPublic | TypeAttributes.Sealed | TypeAttributes.BeforeFieldInit, TypeManager.value_type);
element = fixed_buffer_type.DefineField (FixedElementName, MemberType, FieldAttributes.Public);
RootContext.RegisterCompilerGeneratedType (fixed_buffer_type);
FieldBuilder = Parent.TypeBuilder.DefineField (Name, fixed_buffer_type, Modifiers.FieldAttr (ModFlags));
Parent.MemberCache.AddMember (FieldBuilder, this);
TypeManager.RegisterFieldBase (FieldBuilder, this);
return true;
}
protected override void DoMemberTypeIndependentChecks ()
{
base.DoMemberTypeIndependentChecks ();
if (!IsUnsafe)
Expression.UnsafeError (Report, Location);
if (Parent.PartialContainer.Kind != Kind.Struct) {
Report.Error (1642, Location, "`{0}': Fixed size buffer fields may only be members of structs",
GetSignatureForError ());
}
}
public override void Emit()
{
ResolveContext rc = new ResolveContext (this);
Constant c = size_expr.ResolveAsConstant (rc, this);
if (c == null)
return;
IntConstant buffer_size_const = c.ImplicitConversionRequired (rc, TypeManager.int32_type, Location) as IntConstant;
if (buffer_size_const == null)
return;
int buffer_size = buffer_size_const.Value;
if (buffer_size <= 0) {
Report.Error (1665, Location, "`{0}': Fixed size buffers must have a length greater than zero", GetSignatureForError ());
return;
}
int type_size = Expression.GetTypeSize (MemberType);
if (buffer_size > int.MaxValue / type_size) {
Report.Error (1664, Location, "Fixed size buffer `{0}' of length `{1}' and type `{2}' exceeded 2^31 limit",
GetSignatureForError (), buffer_size.ToString (), TypeManager.CSharpName (MemberType));
return;
}
buffer_size *= type_size;
EmitFieldSize (buffer_size);
PredefinedAttributes.Get.UnsafeValueType.EmitAttribute (fixed_buffer_type);
base.Emit ();
}
void EmitFieldSize (int buffer_size)
{
CustomAttributeBuilder cab;
PredefinedAttribute pa;
pa = PredefinedAttributes.Get.StructLayout;
if (pa.Constructor == null &&
!pa.ResolveConstructor (Location, TypeManager.short_type))
return;
// TODO: It's not cleared
if (fi == null)
fi = new FieldInfo[] { pa.Type.GetField ("Size") };
object[] fi_val = new object[] { buffer_size };
cab = new CustomAttributeBuilder (pa.Constructor,
ctor_args, fi, fi_val);
fixed_buffer_type.SetCustomAttribute (cab);
//
// Don't emit FixedBufferAttribute attribute for private types
//
if ((ModFlags & Modifiers.PRIVATE) != 0)
return;
pa = PredefinedAttributes.Get.FixedBuffer;
if (pa.Constructor == null &&
!pa.ResolveConstructor (Location, TypeManager.type_type, TypeManager.int32_type))
return;
cab = new CustomAttributeBuilder (pa.Constructor, new object[] { MemberType, buffer_size });
FieldBuilder.SetCustomAttribute (cab);
}
protected override bool IsFieldClsCompliant {
get {
return false;
}
}
public void SetCharSet (TypeAttributes ta)
{
TypeAttributes cta = fixed_buffer_type.Attributes;
if ((cta & TypeAttributes.UnicodeClass) != (ta & TypeAttributes.UnicodeClass))
SetTypeBuilderCharSet ((cta & ~TypeAttributes.AutoClass) | TypeAttributes.UnicodeClass);
else if ((cta & TypeAttributes.AutoClass) != (ta & TypeAttributes.AutoClass))
SetTypeBuilderCharSet ((cta & ~TypeAttributes.UnicodeClass) | TypeAttributes.AutoClass);
else if (cta == 0 && ta != 0)
SetTypeBuilderCharSet (cta & ~(TypeAttributes.UnicodeClass | TypeAttributes.AutoClass));
}
void SetTypeBuilderCharSet (TypeAttributes ta)
{
MethodInfo mi = typeof (TypeBuilder).GetMethod ("SetCharSet", BindingFlags.Instance | BindingFlags.NonPublic);
if (mi == null) {
Report.RuntimeMissingSupport (Location, "TypeBuilder::SetCharSet");
} else {
mi.Invoke (fixed_buffer_type, new object [] { ta });
}
}
#region IFixedField Members
public FieldInfo Element {
get {
return element;
}
}
public Type ElementType {
get {
return MemberType;
}
}
#endregion
}
//
// The Field class is used to represents class/struct fields during parsing.
//
public class Field : FieldBase {
// <summary>
// Modifiers allowed in a class declaration
// </summary>
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.STATIC |
Modifiers.VOLATILE |
Modifiers.UNSAFE |
Modifiers.READONLY;
public Field (DeclSpace parent, FullNamedExpression type, int mod, MemberName name,
Attributes attrs)
: base (parent, type, mod, AllowedModifiers, name, attrs)
{
}
bool CanBeVolatile ()
{
if (TypeManager.IsReferenceType (MemberType))
return true;
if (MemberType == TypeManager.bool_type || MemberType == TypeManager.char_type ||
MemberType == TypeManager.sbyte_type || MemberType == TypeManager.byte_type ||
MemberType == TypeManager.short_type || MemberType == TypeManager.ushort_type ||
MemberType == TypeManager.int32_type || MemberType == TypeManager.uint32_type ||
MemberType == TypeManager.float_type ||
MemberType == TypeManager.intptr_type || MemberType == TypeManager.uintptr_type)
return true;
if (TypeManager.IsEnumType (MemberType))
return true;
return false;
}
bool CheckStructLayout (Type type, bool isStatic)
{
if (TypeManager.IsBuiltinType (type))
return true;
if (isStatic) {
if (!TypeManager.IsValueType (type) || TypeManager.IsEqual (type, Parent.TypeBuilder))
return true;
}
if (!TypeManager.IsEqual (TypeManager.DropGenericTypeArguments (type), Parent.TypeBuilder)) {
if (!TypeManager.IsGenericType (type))
return true;
foreach (Type t in TypeManager.GetTypeArguments (type)) {
if (!CheckStructLayout (t, false))
return false;
}
return true;
}
Report.Error (523, Location,
"Struct member `{0}' of type `{1}' causes a cycle in the struct layout",
GetSignatureForError (), TypeManager.CSharpName (MemberType));
return false;
}
public override bool Define ()
{
if (!base.Define ())
return false;
try {
#if GMCS_SOURCE
Type[] required_modifier = null;
if ((ModFlags & Modifiers.VOLATILE) != 0) {
if (TypeManager.isvolatile_type == null)
TypeManager.isvolatile_type = TypeManager.CoreLookupType (Compiler,
"System.Runtime.CompilerServices", "IsVolatile", Kind.Class, true);
if (TypeManager.isvolatile_type != null)
required_modifier = new Type [] { TypeManager.isvolatile_type };
}
FieldBuilder = Parent.TypeBuilder.DefineField (
Name, MemberType, required_modifier, null, Modifiers.FieldAttr (ModFlags));
#else
FieldBuilder = Parent.TypeBuilder.DefineField (
Name, MemberType, Modifiers.FieldAttr (ModFlags));
#endif
// Don't cache inaccessible fields
if ((ModFlags & Modifiers.BACKING_FIELD) == 0) {
Parent.MemberCache.AddMember (FieldBuilder, this);
}
TypeManager.RegisterFieldBase (FieldBuilder, this);
}
catch (ArgumentException) {
Report.RuntimeMissingSupport (Location, "`void' or `void*' field type");
return false;
}
if (initializer != null) {
((TypeContainer) Parent).RegisterFieldForInitialization (this,
new FieldInitializer (FieldBuilder, initializer, this));
} else {
if (Parent.PartialContainer.Kind == Kind.Struct)
CheckStructLayout (member_type, (ModFlags & Modifiers.STATIC) != 0);
}
return true;
}
protected override void DoMemberTypeDependentChecks ()
{
base.DoMemberTypeDependentChecks ();
if ((ModFlags & Modifiers.VOLATILE) != 0) {
if (!CanBeVolatile ()) {
Report.Error (677, Location, "`{0}': A volatile field cannot be of the type `{1}'",
GetSignatureForError (), TypeManager.CSharpName (MemberType));
}
if ((ModFlags & Modifiers.READONLY) != 0) {
Report.Error (678, Location, "`{0}': A field cannot be both volatile and readonly",
GetSignatureForError ());
}
}
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
if ((ModFlags & Modifiers.VOLATILE) != 0) {
Report.Warning (3026, 1, Location, "CLS-compliant field `{0}' cannot be volatile", GetSignatureForError ());
}
return true;
}
}
//
// `set' and `get' accessors are represented with an Accessor.
//
public class Accessor {
//
// Null if the accessor is empty, or a Block if not
//
public const int AllowedModifiers =
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE;
public ToplevelBlock Block;
public Attributes Attributes;
public Location Location;
public int ModFlags;
public ParametersCompiled Parameters;
public Accessor (ToplevelBlock b, int mod, Attributes attrs, ParametersCompiled p, Location loc)
{
Block = b;
Attributes = attrs;
Location = loc;
Parameters = p;
ModFlags = Modifiers.Check (AllowedModifiers, mod, 0, loc, RootContext.ToplevelTypes.Compiler.Report);
}
}
// Ooouh Martin, templates are missing here.
// When it will be possible move here a lot of child code and template method type.
public abstract class AbstractPropertyEventMethod : MemberCore, IMethodData {
protected MethodData method_data;
protected ToplevelBlock block;
protected ListDictionary declarative_security;
// The accessor are created even if they are not wanted.
// But we need them because their names are reserved.
// Field says whether accessor will be emited or not
public readonly bool IsDummy;
protected readonly string prefix;
ReturnParameter return_attributes;
public AbstractPropertyEventMethod (PropertyBasedMember member, string prefix)
: base (member.Parent, SetupName (prefix, member, member.Location), null)
{
this.prefix = prefix;
IsDummy = true;
}
public AbstractPropertyEventMethod (InterfaceMemberBase member, Accessor accessor,
string prefix)
: base (member.Parent, SetupName (prefix, member, accessor.Location),
accessor.Attributes)
{
this.prefix = prefix;
this.block = accessor.Block;
}
static MemberName SetupName (string prefix, InterfaceMemberBase member, Location loc)
{
return new MemberName (member.MemberName.Left, prefix + member.ShortName, loc);
}
public void UpdateName (InterfaceMemberBase member)
{
SetMemberName (SetupName (prefix, member, Location));
}
#region IMethodData Members
public ToplevelBlock Block {
get {
return block;
}
set {
block = value;
}
}
public CallingConventions CallingConventions {
get {
return CallingConventions.Standard;
}
}
public EmitContext CreateEmitContext (ILGenerator ig)
{
return new EmitContext (this, ig, ReturnType);
}
public bool IsExcluded ()
{
return false;
}
GenericMethod IMethodData.GenericMethod {
get {
return null;
}
}
public MemberName MethodName {
get {
return MemberName;
}
}
public Type[] ParameterTypes {
get {
return ParameterInfo.Types;
}
}
public abstract ParametersCompiled ParameterInfo { get ; }
public abstract Type ReturnType { get; }
#endregion
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.CLSCompliant || a.Type == pa.Obsolete || a.Type == pa.Conditional) {
Report.Error (1667, a.Location,
"Attribute `{0}' is not valid on property or event accessors. It is valid on `{1}' declarations only",
TypeManager.CSharpName (a.Type), a.GetValidTargets ());
return;
}
if (a.IsValidSecurityAttribute ()) {
if (declarative_security == null)
declarative_security = new ListDictionary ();
a.ExtractSecurityPermissionSet (declarative_security);
return;
}
if (a.Target == AttributeTargets.Method) {
method_data.MethodBuilder.SetCustomAttribute (cb);
return;
}
if (a.Target == AttributeTargets.ReturnValue) {
if (return_attributes == null)
return_attributes = new ReturnParameter (method_data.MethodBuilder, Location);
return_attributes.ApplyAttributeBuilder (a, cb, pa);
return;
}
ApplyToExtraTarget (a, cb, pa);
}
protected virtual void ApplyToExtraTarget (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
throw new NotSupportedException ("You forgot to define special attribute target handling");
}
// It is not supported for the accessors
public sealed override bool Define()
{
throw new NotSupportedException ();
}
public virtual void Emit (DeclSpace parent)
{
method_data.Emit (parent);
if ((ModFlags & Modifiers.COMPILER_GENERATED) != 0 && !Parent.IsCompilerGenerated)
PredefinedAttributes.Get.CompilerGenerated.EmitAttribute (method_data.MethodBuilder);
if (((ModFlags & Modifiers.DEBUGGER_HIDDEN) != 0))
PredefinedAttributes.Get.DebuggerHidden.EmitAttribute (method_data.MethodBuilder);
if (TypeManager.IsDynamicType (ReturnType)) {
return_attributes = new ReturnParameter (method_data.MethodBuilder, Location);
return_attributes.EmitPredefined (PredefinedAttributes.Get.Dynamic, Location);
}
if (OptAttributes != null)
OptAttributes.Emit ();
if (declarative_security != null) {
foreach (DictionaryEntry de in declarative_security) {
method_data.MethodBuilder.AddDeclarativeSecurity ((SecurityAction)de.Key, (PermissionSet)de.Value);
}
}
block = null;
}
public override bool EnableOverloadChecks (MemberCore overload)
{
// This can only happen with indexers and it will
// be catched as indexer difference
if (overload is AbstractPropertyEventMethod)
return true;
if (overload is MethodCore) {
caching_flags |= Flags.MethodOverloadsExist;
return true;
}
return false;
}
public override bool IsClsComplianceRequired()
{
return false;
}
public bool IsDuplicateImplementation (MethodCore method)
{
if (!MemberName.Equals (method.MemberName))
return false;
Type[] param_types = method.ParameterTypes;
if (param_types == null || param_types.Length != ParameterTypes.Length)
return false;
for (int i = 0; i < param_types.Length; i++)
if (param_types [i] != ParameterTypes [i])
return false;
Report.SymbolRelatedToPreviousError (method);
Report.Error (82, Location, "A member `{0}' is already reserved",
method.GetSignatureForError ());
return true;
}
public override bool IsUsed
{
get {
if (IsDummy)
return false;
return base.IsUsed;
}
}
//
// Represents header string for documentation comment.
//
public override string DocCommentHeader {
get { throw new InvalidOperationException ("Unexpected attempt to get doc comment from " + this.GetType () + "."); }
}
void IMethodData.EmitExtraSymbolInfo (SourceMethod source)
{ }
}
//
// Properties and Indexers both generate PropertyBuilders, we use this to share
// their common bits.
//
abstract public class PropertyBase : PropertyBasedMember {
public class GetMethod : PropertyMethod
{
static string[] attribute_targets = new string [] { "method", "return" };
public GetMethod (PropertyBase method):
base (method, "get_")
{
}
public GetMethod (PropertyBase method, Accessor accessor):
base (method, accessor, "get_")
{
}
public override MethodBuilder Define (DeclSpace parent)
{
base.Define (parent);
if (IsDummy)
return null;
method_data = new MethodData (method, ModFlags, flags, this);
if (!method_data.Define (parent, method.GetFullName (MemberName), Report))
return null;
return method_data.MethodBuilder;
}
public override Type ReturnType {
get {
return method.MemberType;
}
}
public override ParametersCompiled ParameterInfo {
get {
return ParametersCompiled.EmptyReadOnlyParameters;
}
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
}
public class SetMethod : PropertyMethod {
static string[] attribute_targets = new string [] { "method", "param", "return" };
ImplicitParameter param_attr;
protected ParametersCompiled parameters;
public SetMethod (PropertyBase method) :
base (method, "set_")
{
parameters = new ParametersCompiled (
new Parameter (method.type_name, "value", Parameter.Modifier.NONE, null, Location));
}
public SetMethod (PropertyBase method, Accessor accessor):
base (method, accessor, "set_")
{
this.parameters = accessor.Parameters;
}
protected override void ApplyToExtraTarget (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Target == AttributeTargets.Parameter) {
if (param_attr == null)
param_attr = new ImplicitParameter (method_data.MethodBuilder);
param_attr.ApplyAttributeBuilder (a, cb, pa);
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override ParametersCompiled ParameterInfo {
get {
return parameters;
}
}
public override MethodBuilder Define (DeclSpace parent)
{
parameters.Resolve (this);
base.Define (parent);
if (IsDummy)
return null;
method_data = new MethodData (method, ModFlags, flags, this);
if (!method_data.Define (parent, method.GetFullName (MemberName), Report))
return null;
return method_data.MethodBuilder;
}
public override Type ReturnType {
get {
return TypeManager.void_type;
}
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
}
static string[] attribute_targets = new string [] { "property" };
public abstract class PropertyMethod : AbstractPropertyEventMethod
{
protected readonly PropertyBase method;
protected MethodAttributes flags;
public PropertyMethod (PropertyBase method, string prefix)
: base (method, prefix)
{
this.method = method;
this.ModFlags = method.ModFlags & (Modifiers.STATIC | Modifiers.UNSAFE);
}
public PropertyMethod (PropertyBase method, Accessor accessor,
string prefix)
: base (method, accessor, prefix)
{
this.method = method;
this.ModFlags = accessor.ModFlags | (method.ModFlags & (Modifiers.STATIC | Modifiers.UNSAFE));
if (accessor.ModFlags != 0 && RootContext.Version == LanguageVersion.ISO_1) {
Report.FeatureIsNotAvailable (Location, "access modifiers on properties");
}
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.IsInternalMethodImplAttribute) {
method.is_external_implementation = true;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Method;
}
}
public override bool IsClsComplianceRequired ()
{
return method.IsClsComplianceRequired ();
}
public virtual MethodBuilder Define (DeclSpace parent)
{
CheckForDuplications ();
if (IsDummy) {
if (method.InterfaceType != null && parent.PartialContainer.PendingImplementations != null) {
MethodInfo mi = parent.PartialContainer.PendingImplementations.IsInterfaceMethod (
MethodName.Name, method.InterfaceType, new MethodData (method, ModFlags, flags, this));
if (mi != null) {
Report.SymbolRelatedToPreviousError (mi);
Report.Error (551, Location, "Explicit interface implementation `{0}' is missing accessor `{1}'",
method.GetSignatureForError (), TypeManager.CSharpSignature (mi, true));
}
}
return null;
}
TypeContainer container = parent.PartialContainer;
//
// Check for custom access modifier
//
if ((ModFlags & Modifiers.Accessibility) == 0) {
ModFlags |= method.ModFlags;
flags = method.flags;
} else {
if (container.Kind == Kind.Interface)
Report.Error (275, Location, "`{0}': accessibility modifiers may not be used on accessors in an interface",
GetSignatureForError ());
if ((method.ModFlags & Modifiers.ABSTRACT) != 0 && (ModFlags & Modifiers.PRIVATE) != 0) {
Report.Error (442, Location, "`{0}': abstract properties cannot have private accessors", GetSignatureForError ());
}
CheckModifiers (ModFlags);
ModFlags |= (method.ModFlags & (~Modifiers.Accessibility));
ModFlags |= Modifiers.PROPERTY_CUSTOM;
flags = Modifiers.MethodAttr (ModFlags);
flags |= (method.flags & (~MethodAttributes.MemberAccessMask));
}
CheckAbstractAndExtern (block != null);
CheckProtectedModifier ();
if (block != null && block.IsIterator)
Iterator.CreateIterator (this, Parent.PartialContainer, ModFlags, Compiler);
return null;
}
public bool HasCustomAccessModifier {
get {
return (ModFlags & Modifiers.PROPERTY_CUSTOM) != 0;
}
}
public PropertyBase Property {
get {
return method;
}
}
public override ObsoleteAttribute GetObsoleteAttribute ()
{
return method.GetObsoleteAttribute ();
}
public override string GetSignatureForError()
{
return method.GetSignatureForError () + '.' + prefix.Substring (0, 3);
}
void CheckModifiers (int modflags)
{
modflags &= Modifiers.Accessibility;
int flags = 0;
int mflags = method.ModFlags & Modifiers.Accessibility;
if ((mflags & Modifiers.PUBLIC) != 0) {
flags |= Modifiers.PROTECTED | Modifiers.INTERNAL | Modifiers.PRIVATE;
}
else if ((mflags & Modifiers.PROTECTED) != 0) {
if ((mflags & Modifiers.INTERNAL) != 0)
flags |= Modifiers.PROTECTED | Modifiers.INTERNAL;
flags |= Modifiers.PRIVATE;
}
else if ((mflags & Modifiers.INTERNAL) != 0)
flags |= Modifiers.PRIVATE;
if ((mflags == modflags) || (modflags & (~flags)) != 0) {
Report.Error (273, Location,
"The accessibility modifier of the `{0}' accessor must be more restrictive than the modifier of the property or indexer `{1}'",
GetSignatureForError (), method.GetSignatureForError ());
}
}
protected bool CheckForDuplications ()
{
if ((caching_flags & Flags.MethodOverloadsExist) == 0)
return true;
return Parent.MemberCache.CheckExistingMembersOverloads (this, Name, ParameterInfo, Report);
}
}
public PropertyMethod Get, Set;
public PropertyBuilder PropertyBuilder;
public MethodBuilder GetBuilder, SetBuilder;
protected bool define_set_first = false;
public PropertyBase (DeclSpace parent, FullNamedExpression type, int mod_flags,
int allowed_mod, MemberName name,
Attributes attrs, bool define_set_first)
: base (parent, null, type, mod_flags, allowed_mod, name, attrs)
{
this.define_set_first = define_set_first;
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.HasSecurityAttribute) {
a.Error_InvalidSecurityParent ();
return;
}
PropertyBuilder.SetCustomAttribute (cb);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Property;
}
}
protected override void DoMemberTypeDependentChecks ()
{
base.DoMemberTypeDependentChecks ();
IsTypePermitted ();
#if MS_COMPATIBLE
if (MemberType.IsGenericParameter)
return;
#endif
if ((MemberType.Attributes & Class.StaticClassAttribute) == Class.StaticClassAttribute) {
Report.Error (722, Location, Error722, TypeManager.CSharpName (MemberType));
}
}
protected override void DoMemberTypeIndependentChecks ()
{
base.DoMemberTypeIndependentChecks ();
//
// Accessors modifiers check
//
if ((Get.ModFlags & Modifiers.Accessibility) != 0 &&
(Set.ModFlags & Modifiers.Accessibility) != 0) {
Report.Error (274, Location, "`{0}': Cannot specify accessibility modifiers for both accessors of the property or indexer",
GetSignatureForError ());
}
if ((ModFlags & Modifiers.OVERRIDE) == 0 &&
(Get.IsDummy && (Set.ModFlags & Modifiers.Accessibility) != 0) ||
(Set.IsDummy && (Get.ModFlags & Modifiers.Accessibility) != 0)) {
Report.Error (276, Location,
"`{0}': accessibility modifiers on accessors may only be used if the property or indexer has both a get and a set accessor",
GetSignatureForError ());
}
}
bool DefineGet ()
{
GetBuilder = Get.Define (Parent);
return (Get.IsDummy) ? true : GetBuilder != null;
}
bool DefineSet (bool define)
{
if (!define)
return true;
SetBuilder = Set.Define (Parent);
return (Set.IsDummy) ? true : SetBuilder != null;
}
protected bool DefineAccessors ()
{
return DefineSet (define_set_first) &&
DefineGet () &&
DefineSet (!define_set_first);
}
protected abstract PropertyInfo ResolveBaseProperty ();
// TODO: rename to Resolve......
protected override MethodInfo FindOutBaseMethod (ref Type base_ret_type)
{
PropertyInfo base_property = ResolveBaseProperty ();
if (base_property == null)
return null;
base_ret_type = base_property.PropertyType;
MethodInfo get_accessor = base_property.GetGetMethod (true);
MethodInfo set_accessor = base_property.GetSetMethod (true);
MethodAttributes get_accessor_access = 0, set_accessor_access = 0;
//
// Check base property accessors conflict
//
if ((ModFlags & (Modifiers.OVERRIDE | Modifiers.NEW)) == Modifiers.OVERRIDE) {
if (get_accessor == null) {
if (Get != null && !Get.IsDummy) {
Report.SymbolRelatedToPreviousError (base_property);
Report.Error (545, Location,
"`{0}.get': cannot override because `{1}' does not have an overridable get accessor",
GetSignatureForError (), TypeManager.GetFullNameSignature (base_property));
}
} else {
get_accessor_access = get_accessor.Attributes & MethodAttributes.MemberAccessMask;
if (!Get.IsDummy && !CheckAccessModifiers (
Modifiers.MethodAttr (Get.ModFlags) & MethodAttributes.MemberAccessMask, get_accessor_access, get_accessor))
Error_CannotChangeAccessModifiers (Get.Location, get_accessor, get_accessor_access, ".get");
}
if (set_accessor == null) {
if (Set != null && !Set.IsDummy) {
Report.SymbolRelatedToPreviousError (base_property);
Report.Error (546, Location,
"`{0}.set': cannot override because `{1}' does not have an overridable set accessor",
GetSignatureForError (), TypeManager.GetFullNameSignature (base_property));
}
} else {
set_accessor_access = set_accessor.Attributes & MethodAttributes.MemberAccessMask;
if (!Set.IsDummy && !CheckAccessModifiers (
Modifiers.MethodAttr (Set.ModFlags) & MethodAttributes.MemberAccessMask, set_accessor_access, set_accessor))
Error_CannotChangeAccessModifiers (Set.Location, set_accessor, set_accessor_access, ".set");
}
}
// When one accessor does not exist and property hides base one
// we need to propagate this upwards
if (set_accessor == null)
set_accessor = get_accessor;
//
// Get the less restrictive access
//
return get_accessor_access > set_accessor_access ? get_accessor : set_accessor;
}
public override void Emit ()
{
//
// The PropertyBuilder can be null for explicit implementations, in that
// case, we do not actually emit the ".property", so there is nowhere to
// put the attribute
//
if (PropertyBuilder != null) {
if (OptAttributes != null)
OptAttributes.Emit ();
if (TypeManager.IsDynamicType (member_type))
PredefinedAttributes.Get.Dynamic.EmitAttribute (PropertyBuilder);
}
if (!Get.IsDummy)
Get.Emit (Parent);
if (!Set.IsDummy)
Set.Emit (Parent);
base.Emit ();
}
/// <summary>
/// Tests whether accessors are not in collision with some method (CS0111)
/// </summary>
public bool AreAccessorsDuplicateImplementation (MethodCore mc)
{
return Get.IsDuplicateImplementation (mc) || Set.IsDuplicateImplementation (mc);
}
public override bool IsUsed
{
get {
if (IsExplicitImpl)
return true;
return Get.IsUsed | Set.IsUsed;
}
}
protected override void SetMemberName (MemberName new_name)
{
base.SetMemberName (new_name);
Get.UpdateName (this);
Set.UpdateName (this);
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
//
// Represents header string for documentation comment.
//
public override string DocCommentHeader {
get { return "P:"; }
}
}
public class Property : PropertyBase
{
public sealed class BackingField : Field
{
readonly Property property;
public BackingField (Property p)
: base (p.Parent, p.type_name,
Modifiers.BACKING_FIELD | Modifiers.COMPILER_GENERATED | Modifiers.PRIVATE | (p.ModFlags & (Modifiers.STATIC | Modifiers.UNSAFE)),
new MemberName ("<" + p.GetFullName (p.MemberName) + ">k__BackingField", p.Location), null)
{
this.property = p;
}
public override string GetSignatureForError ()
{
return property.GetSignatureForError ();
}
}
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.STATIC |
Modifiers.SEALED |
Modifiers.OVERRIDE |
Modifiers.ABSTRACT |
Modifiers.UNSAFE |
Modifiers.EXTERN |
Modifiers.VIRTUAL;
const int AllowedInterfaceModifiers =
Modifiers.NEW;
public Property (DeclSpace parent, FullNamedExpression type, int mod,
MemberName name, Attributes attrs, Accessor get_block,
Accessor set_block, bool define_set_first)
: this (parent, type, mod, name, attrs, get_block, set_block,
define_set_first, null)
{
}
public Property (DeclSpace parent, FullNamedExpression type, int mod,
MemberName name, Attributes attrs, Accessor get_block,
Accessor set_block, bool define_set_first, Block current_block)
: base (parent, type, mod,
parent.PartialContainer.Kind == Kind.Interface ? AllowedInterfaceModifiers : AllowedModifiers,
name, attrs, define_set_first)
{
if (get_block == null)
Get = new GetMethod (this);
else
Get = new GetMethod (this, get_block);
if (set_block == null)
Set = new SetMethod (this);
else
Set = new SetMethod (this, set_block);
if (!IsInterface && (mod & (Modifiers.ABSTRACT | Modifiers.EXTERN)) == 0 &&
get_block != null && get_block.Block == null &&
set_block != null && set_block.Block == null) {
if (RootContext.Version <= LanguageVersion.ISO_2)
Report.FeatureIsNotAvailable (Location, "automatically implemented properties");
Get.ModFlags |= Modifiers.COMPILER_GENERATED;
Set.ModFlags |= Modifiers.COMPILER_GENERATED;
}
}
void CreateAutomaticProperty ()
{
// Create backing field
Field field = new BackingField (this);
if (!field.Define ())
return;
Parent.PartialContainer.AddField (field);
FieldExpr fe = new FieldExpr (field.FieldBuilder, Location);
if ((field.ModFlags & Modifiers.STATIC) == 0)
fe.InstanceExpression = new CompilerGeneratedThis (fe.Type, Location);
// Create get block
Get.Block = new ToplevelBlock (Compiler, ParametersCompiled.EmptyReadOnlyParameters, Location);
Return r = new Return (fe, Location);
Get.Block.AddStatement (r);
// Create set block
Set.Block = new ToplevelBlock (Compiler, Set.ParameterInfo, Location);
Assign a = new SimpleAssign (fe, new SimpleName ("value", Location));
Set.Block.AddStatement (new StatementExpression (a));
}
public override bool Define ()
{
if (!base.Define ())
return false;
flags |= MethodAttributes.HideBySig | MethodAttributes.SpecialName;
if ((Get.ModFlags & Modifiers.COMPILER_GENERATED) != 0)
CreateAutomaticProperty ();
if (!DefineAccessors ())
return false;
if (!CheckBase ())
return false;
// FIXME - PropertyAttributes.HasDefault ?
PropertyBuilder = Parent.TypeBuilder.DefineProperty (
GetFullName (MemberName), PropertyAttributes.None, MemberType, null);
if (!Get.IsDummy) {
PropertyBuilder.SetGetMethod (GetBuilder);
Parent.MemberCache.AddMember (GetBuilder, Get);
}
if (!Set.IsDummy) {
PropertyBuilder.SetSetMethod (SetBuilder);
Parent.MemberCache.AddMember (SetBuilder, Set);
}
TypeManager.RegisterProperty (PropertyBuilder, this);
Parent.MemberCache.AddMember (PropertyBuilder, this);
return true;
}
public override void Emit ()
{
if (((Set.ModFlags | Get.ModFlags) & (Modifiers.STATIC | Modifiers.COMPILER_GENERATED)) == Modifiers.COMPILER_GENERATED && Parent.PartialContainer.HasExplicitLayout) {
Report.Error (842, Location,
"Automatically implemented property `{0}' cannot be used inside a type with an explicit StructLayout attribute",
GetSignatureForError ());
}
base.Emit ();
}
protected override PropertyInfo ResolveBaseProperty ()
{
return Parent.PartialContainer.BaseCache.FindMemberToOverride (
Parent.TypeBuilder, Name, ParametersCompiled.EmptyReadOnlyParameters, null, true) as PropertyInfo;
}
}
/// </summary>
/// Gigantic workaround for lameness in SRE follows :
/// This class derives from EventInfo and attempts to basically
/// wrap around the EventBuilder so that FindMembers can quickly
/// return this in it search for members
/// </summary>
public class MyEventBuilder : EventInfo {
//
// We use this to "point" to our Builder which is
// not really a MemberInfo
//
EventBuilder MyBuilder;
//
// We "catch" and wrap these methods
//
MethodInfo raise, remove, add;
EventAttributes attributes;
Type declaring_type, reflected_type, event_type;
string name;
Event my_event;
public MyEventBuilder (Event ev, TypeBuilder type_builder, string name, EventAttributes event_attr, Type event_type)
{
MyBuilder = type_builder.DefineEvent (name, event_attr, event_type);
// And now store the values in our own fields.
declaring_type = type_builder;
reflected_type = type_builder;
attributes = event_attr;
this.name = name;
my_event = ev;
this.event_type = event_type;
}
//
// Methods that you have to override. Note that you only need
// to "implement" the variants that take the argument (those are
// the "abstract" methods, the others (GetAddMethod()) are
// regular.
//
public override MethodInfo GetAddMethod (bool nonPublic)
{
return add;
}
public override MethodInfo GetRemoveMethod (bool nonPublic)
{
return remove;
}
public override MethodInfo GetRaiseMethod (bool nonPublic)
{
return raise;
}
//
// These methods make "MyEventInfo" look like a Builder
//
public void SetRaiseMethod (MethodBuilder raiseMethod)
{
raise = raiseMethod;
MyBuilder.SetRaiseMethod (raiseMethod);
}
public void SetRemoveOnMethod (MethodBuilder removeMethod)
{
remove = removeMethod;
MyBuilder.SetRemoveOnMethod (removeMethod);
}
public void SetAddOnMethod (MethodBuilder addMethod)
{
add = addMethod;
MyBuilder.SetAddOnMethod (addMethod);
}
public void SetCustomAttribute (CustomAttributeBuilder cb)
{
MyBuilder.SetCustomAttribute (cb);
}
public override object [] GetCustomAttributes (bool inherit)
{
// FIXME : There's nothing which can be seemingly done here because
// we have no way of getting at the custom attribute objects of the
// EventBuilder !
return null;
}
public override object [] GetCustomAttributes (Type t, bool inherit)
{
// FIXME : Same here !
return null;
}
public override bool IsDefined (Type t, bool b)
{
return true;
}
public override EventAttributes Attributes {
get {
return attributes;
}
}
public override string Name {
get {
return name;
}
}
public override Type DeclaringType {
get {
return declaring_type;
}
}
public override Type ReflectedType {
get {
return reflected_type;
}
}
public Type EventType {
get {
return event_type;
}
}
public void SetUsed ()
{
if (my_event != null) {
// my_event.SetAssigned ();
my_event.SetMemberIsUsed ();
}
}
}
/// <summary>
/// For case when event is declared like property (with add and remove accessors).
/// </summary>
public class EventProperty: Event {
abstract class AEventPropertyAccessor : AEventAccessor
{
protected AEventPropertyAccessor (Event method, Accessor accessor, string prefix):
base (method, accessor, prefix)
{
}
public override MethodBuilder Define (DeclSpace ds)
{
CheckAbstractAndExtern (block != null);
return base.Define (ds);
}
public override string GetSignatureForError ()
{
return method.GetSignatureForError () + "." + prefix.Substring (0, prefix.Length - 1);
}
}
sealed class AddDelegateMethod: AEventPropertyAccessor
{
public AddDelegateMethod (Event method, Accessor accessor):
base (method, accessor, AddPrefix)
{
}
}
sealed class RemoveDelegateMethod: AEventPropertyAccessor
{
public RemoveDelegateMethod (Event method, Accessor accessor):
base (method, accessor, RemovePrefix)
{
}
}
static readonly string[] attribute_targets = new string [] { "event" }; // "property" target was disabled for 2.0 version
public EventProperty (DeclSpace parent, FullNamedExpression type, int mod_flags,
MemberName name,
Attributes attrs, Accessor add, Accessor remove)
: base (parent, type, mod_flags, name, attrs)
{
Add = new AddDelegateMethod (this, add);
Remove = new RemoveDelegateMethod (this, remove);
}
public override bool Define()
{
if (!base.Define ())
return false;
SetMemberIsUsed ();
return true;
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
}
/// <summary>
/// Event is declared like field.
/// </summary>
public class EventField : Event {
abstract class EventFieldAccessor : AEventAccessor
{
protected EventFieldAccessor (Event method, string prefix)
: base (method, prefix)
{
}
public override void Emit (DeclSpace parent)
{
if ((method.ModFlags & (Modifiers.ABSTRACT | Modifiers.EXTERN)) == 0) {
if (parent is Class) {
MethodBuilder mb = method_data.MethodBuilder;
mb.SetImplementationFlags (mb.GetMethodImplementationFlags () | MethodImplAttributes.Synchronized);
}
// TODO: because we cannot use generics yet
FieldInfo field_info = ((EventField) method).BackingField.FieldBuilder;
FieldExpr f_expr = new FieldExpr (field_info, Location);
if ((method.ModFlags & Modifiers.STATIC) == 0)
f_expr.InstanceExpression = new CompilerGeneratedThis (field_info.FieldType, Location);
block = new ToplevelBlock (Compiler, ParameterInfo, Location);
block.AddStatement (new StatementExpression (
new CompoundAssign (Operation,
f_expr,
block.GetParameterReference (ParameterInfo[0].Name, Location))));
}
base.Emit (parent);
}
protected abstract Binary.Operator Operation { get; }
}
sealed class AddDelegateMethod: EventFieldAccessor
{
public AddDelegateMethod (Event method):
base (method, AddPrefix)
{
}
protected override Binary.Operator Operation {
get { return Binary.Operator.Addition; }
}
}
sealed class RemoveDelegateMethod: EventFieldAccessor
{
public RemoveDelegateMethod (Event method):
base (method, RemovePrefix)
{
}
protected override Binary.Operator Operation {
get { return Binary.Operator.Subtraction; }
}
}
static readonly string[] attribute_targets = new string [] { "event", "field", "method" };
static readonly string[] attribute_targets_interface = new string[] { "event", "method" };
public Field BackingField;
public Expression Initializer;
public EventField (DeclSpace parent, FullNamedExpression type, int mod_flags, MemberName name, Attributes attrs)
: base (parent, type, mod_flags, name, attrs)
{
Add = new AddDelegateMethod (this);
Remove = new RemoveDelegateMethod (this);
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Target == AttributeTargets.Field) {
BackingField.ApplyAttributeBuilder (a, cb, pa);
return;
}
if (a.Target == AttributeTargets.Method) {
int errors = Report.Errors;
Add.ApplyAttributeBuilder (a, cb, pa);
if (errors == Report.Errors)
Remove.ApplyAttributeBuilder (a, cb, pa);
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override bool Define()
{
if (!base.Define ())
return false;
if (Initializer != null && (ModFlags & Modifiers.ABSTRACT) != 0) {
Report.Error (74, Location, "`{0}': abstract event cannot have an initializer",
GetSignatureForError ());
}
if (!HasBackingField) {
SetMemberIsUsed ();
return true;
}
// FIXME: We are unable to detect whether generic event is used because
// we are using FieldExpr instead of EventExpr for event access in that
// case. When this issue will be fixed this hack can be removed.
if (TypeManager.IsGenericType (MemberType))
SetMemberIsUsed ();
if (Add.IsInterfaceImplementation)
SetMemberIsUsed ();
TypeManager.RegisterEventField (EventBuilder, this);
BackingField = new Field (Parent,
new TypeExpression (MemberType, Location),
Modifiers.BACKING_FIELD | Modifiers.COMPILER_GENERATED | Modifiers.PRIVATE | (ModFlags & (Modifiers.STATIC | Modifiers.UNSAFE)),
MemberName, null);
Parent.PartialContainer.AddField (BackingField);
BackingField.Initializer = Initializer;
BackingField.ModFlags &= ~Modifiers.COMPILER_GENERATED;
// Call define because we passed fields definition
return BackingField.Define ();
}
bool HasBackingField {
get {
return !IsInterface && (ModFlags & Modifiers.ABSTRACT) == 0;
}
}
public override string[] ValidAttributeTargets
{
get {
return HasBackingField ? attribute_targets : attribute_targets_interface;
}
}
}
public abstract class Event : PropertyBasedMember {
public abstract class AEventAccessor : AbstractPropertyEventMethod
{
protected readonly Event method;
ImplicitParameter param_attr;
static readonly string[] attribute_targets = new string [] { "method", "param", "return" };
public const string AddPrefix = "add_";
public const string RemovePrefix = "remove_";
protected AEventAccessor (Event method, string prefix)
: base (method, prefix)
{
this.method = method;
this.ModFlags = method.ModFlags;
}
protected AEventAccessor (Event method, Accessor accessor, string prefix)
: base (method, accessor, prefix)
{
this.method = method;
this.ModFlags = method.ModFlags;
}
public bool IsInterfaceImplementation {
get { return method_data.implementing != null; }
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.IsInternalMethodImplAttribute) {
method.is_external_implementation = true;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
protected override void ApplyToExtraTarget (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Target == AttributeTargets.Parameter) {
if (param_attr == null)
param_attr = new ImplicitParameter (method_data.MethodBuilder);
param_attr.ApplyAttributeBuilder (a, cb, pa);
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Method;
}
}
public override bool IsClsComplianceRequired ()
{
return method.IsClsComplianceRequired ();
}
public virtual MethodBuilder Define (DeclSpace parent)
{
method_data = new MethodData (method, method.ModFlags,
method.flags | MethodAttributes.HideBySig | MethodAttributes.SpecialName, this);
if (!method_data.Define (parent, method.GetFullName (MemberName), Report))
return null;
MethodBuilder mb = method_data.MethodBuilder;
ParameterInfo.ApplyAttributes (mb);
return mb;
}
public override Type ReturnType {
get {
return TypeManager.void_type;
}
}
public override ObsoleteAttribute GetObsoleteAttribute ()
{
return method.GetObsoleteAttribute ();
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
public override ParametersCompiled ParameterInfo {
get {
return method.parameters;
}
}
}
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.STATIC |
Modifiers.VIRTUAL |
Modifiers.SEALED |
Modifiers.OVERRIDE |
Modifiers.UNSAFE |
Modifiers.ABSTRACT |
Modifiers.EXTERN;
const int AllowedInterfaceModifiers =
Modifiers.NEW;
public AEventAccessor Add, Remove;
public MyEventBuilder EventBuilder;
public MethodBuilder AddBuilder, RemoveBuilder;
ParametersCompiled parameters;
protected Event (DeclSpace parent, FullNamedExpression type, int mod_flags, MemberName name, Attributes attrs)
: base (parent, null, type, mod_flags,
parent.PartialContainer.Kind == Kind.Interface ? AllowedInterfaceModifiers : AllowedModifiers,
name, attrs)
{
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if ((a.HasSecurityAttribute)) {
a.Error_InvalidSecurityParent ();
return;
}
EventBuilder.SetCustomAttribute (cb);
}
public bool AreAccessorsDuplicateImplementation (MethodCore mc)
{
return Add.IsDuplicateImplementation (mc) || Remove.IsDuplicateImplementation (mc);
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Event;
}
}
public override bool Define ()
{
if (!base.Define ())
return false;
if (!TypeManager.IsDelegateType (MemberType)) {
Report.Error (66, Location, "`{0}': event must be of a delegate type", GetSignatureForError ());
}
parameters = ParametersCompiled.CreateFullyResolved (
new Parameter (null, "value", Parameter.Modifier.NONE, null, Location), MemberType);
if (!CheckBase ())
return false;
if (TypeManager.delegate_combine_delegate_delegate == null) {
TypeManager.delegate_combine_delegate_delegate = TypeManager.GetPredefinedMethod (
TypeManager.delegate_type, "Combine", Location,
TypeManager.delegate_type, TypeManager.delegate_type);
}
if (TypeManager.delegate_remove_delegate_delegate == null) {
TypeManager.delegate_remove_delegate_delegate = TypeManager.GetPredefinedMethod (
TypeManager.delegate_type, "Remove", Location,
TypeManager.delegate_type, TypeManager.delegate_type);
}
//
// Now define the accessors
//
AddBuilder = Add.Define (Parent);
if (AddBuilder == null)
return false;
RemoveBuilder = Remove.Define (Parent);
if (RemoveBuilder == null)
return false;
EventBuilder = new MyEventBuilder (this, Parent.TypeBuilder, Name, EventAttributes.None, MemberType);
EventBuilder.SetAddOnMethod (AddBuilder);
EventBuilder.SetRemoveOnMethod (RemoveBuilder);
Parent.MemberCache.AddMember (EventBuilder, this);
Parent.MemberCache.AddMember (AddBuilder, Add);
Parent.MemberCache.AddMember (RemoveBuilder, Remove);
return true;
}
public override void Emit ()
{
if (OptAttributes != null) {
OptAttributes.Emit ();
}
Add.Emit (Parent);
Remove.Emit (Parent);
base.Emit ();
}
protected override MethodInfo FindOutBaseMethod (ref Type base_ret_type)
{
MethodInfo mi = (MethodInfo) Parent.PartialContainer.BaseCache.FindBaseEvent (
Parent.TypeBuilder, Name);
if (mi == null)
return null;
AParametersCollection pd = TypeManager.GetParameterData (mi);
base_ret_type = pd.Types [0];
return mi;
}
//
// Represents header string for documentation comment.
//
public override string DocCommentHeader {
get { return "E:"; }
}
}
public class Indexer : PropertyBase
{
public class GetIndexerMethod : GetMethod
{
ParametersCompiled parameters;
public GetIndexerMethod (Indexer method):
base (method)
{
this.parameters = method.parameters;
}
public GetIndexerMethod (PropertyBase method, Accessor accessor):
base (method, accessor)
{
parameters = accessor.Parameters;
}
public override MethodBuilder Define (DeclSpace parent)
{
parameters.Resolve (this);
return base.Define (parent);
}
public override bool EnableOverloadChecks (MemberCore overload)
{
if (base.EnableOverloadChecks (overload)) {
overload.caching_flags |= Flags.MethodOverloadsExist;
return true;
}
return false;
}
public override ParametersCompiled ParameterInfo {
get {
return parameters;
}
}
}
public class SetIndexerMethod: SetMethod
{
public SetIndexerMethod (Indexer method):
base (method)
{
parameters = ParametersCompiled.MergeGenerated (method.parameters, false, parameters [0], null);
}
public SetIndexerMethod (PropertyBase method, Accessor accessor):
base (method, accessor)
{
parameters = method.Get.IsDummy ? accessor.Parameters : accessor.Parameters.Clone ();
}
public override bool EnableOverloadChecks (MemberCore overload)
{
if (base.EnableOverloadChecks (overload)) {
overload.caching_flags |= Flags.MethodOverloadsExist;
return true;
}
return false;
}
}
const int AllowedModifiers =
Modifiers.NEW |
Modifiers.PUBLIC |
Modifiers.PROTECTED |
Modifiers.INTERNAL |
Modifiers.PRIVATE |
Modifiers.VIRTUAL |
Modifiers.SEALED |
Modifiers.OVERRIDE |
Modifiers.UNSAFE |
Modifiers.EXTERN |
Modifiers.ABSTRACT;
const int AllowedInterfaceModifiers =
Modifiers.NEW;
public readonly ParametersCompiled parameters;
public Indexer (DeclSpace parent, FullNamedExpression type, MemberName name, int mod,
ParametersCompiled parameters, Attributes attrs,
Accessor get_block, Accessor set_block, bool define_set_first)
: base (parent, type, mod,
parent.PartialContainer.Kind == Kind.Interface ? AllowedInterfaceModifiers : AllowedModifiers,
name, attrs, define_set_first)
{
this.parameters = parameters;
if (get_block == null)
Get = new GetIndexerMethod (this);
else
Get = new GetIndexerMethod (this, get_block);
if (set_block == null)
Set = new SetIndexerMethod (this);
else
Set = new SetIndexerMethod (this, set_block);
}
protected override bool CheckForDuplications ()
{
return Parent.MemberCache.CheckExistingMembersOverloads (this, GetFullName (MemberName), parameters, Report);
}
public override bool Define ()
{
if (!base.Define ())
return false;
if (!DefineParameters (parameters))
return false;
if (OptAttributes != null) {
Attribute indexer_attr = OptAttributes.Search (PredefinedAttributes.Get.IndexerName);
if (indexer_attr != null) {
// Remove the attribute from the list because it is not emitted
OptAttributes.Attrs.Remove (indexer_attr);
string name = indexer_attr.GetIndexerAttributeValue ();
if (name == null)
return false;
ShortName = name;
if (IsExplicitImpl) {
Report.Error (415, indexer_attr.Location,
"The `IndexerName' attribute is valid only on an " +
"indexer that is not an explicit interface member declaration");
return false;
}
if ((ModFlags & Modifiers.OVERRIDE) != 0) {
Report.Error (609, indexer_attr.Location,
"Cannot set the `IndexerName' attribute on an indexer marked override");
return false;
}
}
}
if (InterfaceType != null) {
string base_IndexerName = TypeManager.IndexerPropertyName (InterfaceType);
if (base_IndexerName != Name)
ShortName = base_IndexerName;
}
if (!Parent.PartialContainer.AddMember (this) ||
!Parent.PartialContainer.AddMember (Get) || !Parent.PartialContainer.AddMember (Set))
return false;
flags |= MethodAttributes.HideBySig | MethodAttributes.SpecialName;
if (!DefineAccessors ())
return false;
if (!CheckBase ())
return false;
//
// Now name the parameters
//
PropertyBuilder = Parent.TypeBuilder.DefineProperty (
GetFullName (MemberName), PropertyAttributes.None, MemberType, parameters.GetEmitTypes ());
if (!Get.IsDummy) {
PropertyBuilder.SetGetMethod (GetBuilder);
Parent.MemberCache.AddMember (GetBuilder, Get);
}
if (!Set.IsDummy) {
PropertyBuilder.SetSetMethod (SetBuilder);
Parent.MemberCache.AddMember (SetBuilder, Set);
}
TypeManager.RegisterIndexer (PropertyBuilder, parameters);
Parent.MemberCache.AddMember (PropertyBuilder, this);
return true;
}
public override bool EnableOverloadChecks (MemberCore overload)
{
if (overload is Indexer) {
caching_flags |= Flags.MethodOverloadsExist;
return true;
}
return base.EnableOverloadChecks (overload);
}
public override string GetDocCommentName (DeclSpace ds)
{
return DocUtil.GetMethodDocCommentName (this, parameters, ds);
}
public override string GetSignatureForError ()
{
StringBuilder sb = new StringBuilder (Parent.GetSignatureForError ());
if (MemberName.Left != null) {
sb.Append ('.');
sb.Append (MemberName.Left.GetSignatureForError ());
}
sb.Append (".this");
sb.Append (parameters.GetSignatureForError ().Replace ('(', '[').Replace (')', ']'));
return sb.ToString ();
}
protected override PropertyInfo ResolveBaseProperty ()
{
return Parent.PartialContainer.BaseCache.FindMemberToOverride (
Parent.TypeBuilder, Name, parameters, null, true) as PropertyInfo;
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ())
return false;
parameters.VerifyClsCompliance ();
return true;
}
}
public class Operator : MethodOrOperator {
const int AllowedModifiers =
Modifiers.PUBLIC |
Modifiers.UNSAFE |
Modifiers.EXTERN |
Modifiers.STATIC;
public enum OpType : byte {
// Unary operators
LogicalNot,
OnesComplement,
Increment,
Decrement,
True,
False,
// Unary and Binary operators
Addition,
Subtraction,
UnaryPlus,
UnaryNegation,
// Binary operators
Multiply,
Division,
Modulus,
BitwiseAnd,
BitwiseOr,
ExclusiveOr,
LeftShift,
RightShift,
Equality,
Inequality,
GreaterThan,
LessThan,
GreaterThanOrEqual,
LessThanOrEqual,
// Implicit and Explicit
Implicit,
Explicit,
// Just because of enum
TOP
};
public readonly OpType OperatorType;
static readonly string [] [] names;
static Operator ()
{
names = new string[(int)OpType.TOP][];
names [(int) OpType.LogicalNot] = new string [] { "!", "op_LogicalNot" };
names [(int) OpType.OnesComplement] = new string [] { "~", "op_OnesComplement" };
names [(int) OpType.Increment] = new string [] { "++", "op_Increment" };
names [(int) OpType.Decrement] = new string [] { "--", "op_Decrement" };
names [(int) OpType.True] = new string [] { "true", "op_True" };
names [(int) OpType.False] = new string [] { "false", "op_False" };
names [(int) OpType.Addition] = new string [] { "+", "op_Addition" };
names [(int) OpType.Subtraction] = new string [] { "-", "op_Subtraction" };
names [(int) OpType.UnaryPlus] = new string [] { "+", "op_UnaryPlus" };
names [(int) OpType.UnaryNegation] = new string [] { "-", "op_UnaryNegation" };
names [(int) OpType.Multiply] = new string [] { "*", "op_Multiply" };
names [(int) OpType.Division] = new string [] { "/", "op_Division" };
names [(int) OpType.Modulus] = new string [] { "%", "op_Modulus" };
names [(int) OpType.BitwiseAnd] = new string [] { "&", "op_BitwiseAnd" };
names [(int) OpType.BitwiseOr] = new string [] { "|", "op_BitwiseOr" };
names [(int) OpType.ExclusiveOr] = new string [] { "^", "op_ExclusiveOr" };
names [(int) OpType.LeftShift] = new string [] { "<<", "op_LeftShift" };
names [(int) OpType.RightShift] = new string [] { ">>", "op_RightShift" };
names [(int) OpType.Equality] = new string [] { "==", "op_Equality" };
names [(int) OpType.Inequality] = new string [] { "!=", "op_Inequality" };
names [(int) OpType.GreaterThan] = new string [] { ">", "op_GreaterThan" };
names [(int) OpType.LessThan] = new string [] { "<", "op_LessThan" };
names [(int) OpType.GreaterThanOrEqual] = new string [] { ">=", "op_GreaterThanOrEqual" };
names [(int) OpType.LessThanOrEqual] = new string [] { "<=", "op_LessThanOrEqual" };
names [(int) OpType.Implicit] = new string [] { "implicit", "op_Implicit" };
names [(int) OpType.Explicit] = new string [] { "explicit", "op_Explicit" };
}
public Operator (DeclSpace parent, OpType type, FullNamedExpression ret_type,
int mod_flags, ParametersCompiled parameters,
ToplevelBlock block, Attributes attrs, Location loc)
: base (parent, null, ret_type, mod_flags, AllowedModifiers,
new MemberName (GetMetadataName (type), loc), attrs, parameters)
{
OperatorType = type;
Block = block;
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
{
if (a.Type == pa.Conditional) {
Error_ConditionalAttributeIsNotValid ();
return;
}
base.ApplyAttributeBuilder (a, cb, pa);
}
public override bool Define ()
{
const int RequiredModifiers = Modifiers.PUBLIC | Modifiers.STATIC;
if ((ModFlags & RequiredModifiers) != RequiredModifiers){
Report.Error (558, Location, "User-defined operator `{0}' must be declared static and public", GetSignatureForError ());
}
if (!base.Define ())
return false;
// imlicit and explicit operator of same types are not allowed
if (OperatorType == OpType.Explicit)
Parent.MemberCache.CheckExistingMembersOverloads (this, GetMetadataName (OpType.Implicit), Parameters, Report);
else if (OperatorType == OpType.Implicit)
Parent.MemberCache.CheckExistingMembersOverloads (this, GetMetadataName (OpType.Explicit), Parameters, Report);
Type declaring_type = MethodData.DeclaringType;
Type return_type = MemberType;
Type first_arg_type = ParameterTypes [0];
Type first_arg_type_unwrap = first_arg_type;
if (TypeManager.IsNullableType (first_arg_type))
first_arg_type_unwrap = TypeManager.TypeToCoreType (TypeManager.GetTypeArguments (first_arg_type) [0]);
Type return_type_unwrap = return_type;
if (TypeManager.IsNullableType (return_type))
return_type_unwrap = TypeManager.TypeToCoreType (TypeManager.GetTypeArguments (return_type) [0]);
if (TypeManager.IsDynamicType (return_type) || TypeManager.IsDynamicType (first_arg_type)) {
Report.Error (1964, Location,
"User-defined operator `{0}' cannot convert to or from the dynamic type",
GetSignatureForError ());
return false;
}
//
// Rules for conversion operators
//
if (OperatorType == OpType.Implicit || OperatorType == OpType.Explicit) {
if (first_arg_type_unwrap == return_type_unwrap && first_arg_type_unwrap == declaring_type){
Report.Error (555, Location,
"User-defined operator cannot take an object of the enclosing type and convert to an object of the enclosing type");
return false;
}
Type conv_type;
if (TypeManager.IsEqual (declaring_type, return_type) || declaring_type == return_type_unwrap) {
conv_type = first_arg_type;
} else if (TypeManager.IsEqual (declaring_type, first_arg_type) || declaring_type == first_arg_type_unwrap) {
conv_type = return_type;
} else {
Report.Error (556, Location,
"User-defined conversion must convert to or from the enclosing type");
return false;
}
//
// Because IsInterface and IsClass are not supported
//
if (!TypeManager.IsGenericParameter (conv_type)) {
if (conv_type.IsInterface) {
Report.Error (552, Location, "User-defined conversion `{0}' cannot convert to or from an interface type",
GetSignatureForError ());
return false;
}
if (conv_type.IsClass) {
if (TypeManager.IsSubclassOf (declaring_type, conv_type)) {
Report.Error (553, Location, "User-defined conversion `{0}' cannot convert to or from a base class",
GetSignatureForError ());
return false;
}
if (TypeManager.IsSubclassOf (conv_type, declaring_type)) {
Report.Error (554, Location, "User-defined conversion `{0}' cannot convert to or from a derived class",
GetSignatureForError ());
return false;
}
}
}
} else if (OperatorType == OpType.LeftShift || OperatorType == OpType.RightShift) {
if (first_arg_type != declaring_type || Parameters.Types [1] != TypeManager.int32_type) {
Report.Error (564, Location, "Overloaded shift operator must have the type of the first operand be the containing type, and the type of the second operand must be int");
return false;
}
} else if (Parameters.Count == 1) {
// Checks for Unary operators
if (OperatorType == OpType.Increment || OperatorType == OpType.Decrement) {
if (return_type != declaring_type && !TypeManager.IsSubclassOf (return_type, declaring_type)) {
Report.Error (448, Location,
"The return type for ++ or -- operator must be the containing type or derived from the containing type");
return false;
}
if (first_arg_type != declaring_type) {
Report.Error (
559, Location, "The parameter type for ++ or -- operator must be the containing type");
return false;
}
}
if (!TypeManager.IsEqual (first_arg_type_unwrap, declaring_type)){
Report.Error (562, Location,
"The parameter type of a unary operator must be the containing type");
return false;
}
if (OperatorType == OpType.True || OperatorType == OpType.False) {
if (return_type != TypeManager.bool_type){
Report.Error (
215, Location,
"The return type of operator True or False " +
"must be bool");
return false;
}
}
} else {
// Checks for Binary operators
if (first_arg_type != declaring_type &&
Parameters.Types [1] != declaring_type){
Report.Error (
563, Location,
"One of the parameters of a binary operator must " +
"be the containing type");
return false;
}
}
return true;
}
protected override bool ResolveMemberType ()
{
if (!base.ResolveMemberType ())
return false;
flags |= MethodAttributes.SpecialName | MethodAttributes.HideBySig;
return true;
}
// Operator cannot be override
protected override MethodInfo FindOutBaseMethod (ref Type base_ret_type)
{
return null;
}
public static string GetName (OpType ot)
{
return names [(int) ot] [0];
}
public static string GetName (string metadata_name)
{
for (int i = 0; i < names.Length; ++i) {
if (names [i] [1] == metadata_name)
return names [i] [0];
}
return null;
}
public static string GetMetadataName (OpType ot)
{
return names [(int) ot] [1];
}
public static string GetMetadataName (string name)
{
for (int i = 0; i < names.Length; ++i) {
if (names [i] [0] == name)
return names [i] [1];
}
return null;
}
public OpType GetMatchingOperator ()
{
switch (OperatorType) {
case OpType.Equality:
return OpType.Inequality;
case OpType.Inequality:
return OpType.Equality;
case OpType.True:
return OpType.False;
case OpType.False:
return OpType.True;
case OpType.GreaterThan:
return OpType.LessThan;
case OpType.LessThan:
return OpType.GreaterThan;
case OpType.GreaterThanOrEqual:
return OpType.LessThanOrEqual;
case OpType.LessThanOrEqual:
return OpType.GreaterThanOrEqual;
default:
return OpType.TOP;
}
}
public override string GetSignatureForError ()
{
StringBuilder sb = new StringBuilder ();
if (OperatorType == OpType.Implicit || OperatorType == OpType.Explicit) {
sb.AppendFormat ("{0}.{1} operator {2}",
Parent.GetSignatureForError (), GetName (OperatorType), type_name.GetSignatureForError ());
}
else {
sb.AppendFormat ("{0}.operator {1}", Parent.GetSignatureForError (), GetName (OperatorType));
}
sb.Append (Parameters.GetSignatureForError ());
return sb.ToString ();
}
}
//
// This is used to compare method signatures
//
struct MethodSignature {
public string Name;
public Type RetType;
public Type [] Parameters;
/// <summary>
/// This delegate is used to extract methods which have the
/// same signature as the argument
/// </summary>
public static MemberFilter method_signature_filter = new MemberFilter (MemberSignatureCompare);
public MethodSignature (string name, Type ret_type, Type [] parameters)
{
Name = name;
RetType = ret_type;
if (parameters == null)
Parameters = Type.EmptyTypes;
else
Parameters = parameters;
}
public override string ToString ()
{
string pars = "";
if (Parameters.Length != 0){
System.Text.StringBuilder sb = new System.Text.StringBuilder ();
for (int i = 0; i < Parameters.Length; i++){
sb.Append (Parameters [i]);
if (i+1 < Parameters.Length)
sb.Append (", ");
}
pars = sb.ToString ();
}
return String.Format ("{0} {1} ({2})", RetType, Name, pars);
}
public override int GetHashCode ()
{
return Name.GetHashCode ();
}
public override bool Equals (Object o)
{
MethodSignature other = (MethodSignature) o;
if (other.Name != Name)
return false;
if (other.RetType != RetType)
return false;
if (Parameters == null){
if (other.Parameters == null)
return true;
return false;
}
if (other.Parameters == null)
return false;
int c = Parameters.Length;
if (other.Parameters.Length != c)
return false;
for (int i = 0; i < c; i++)
if (other.Parameters [i] != Parameters [i])
return false;
return true;
}
static bool MemberSignatureCompare (MemberInfo m, object filter_criteria)
{
MethodSignature sig = (MethodSignature) filter_criteria;
if (m.Name != sig.Name)
return false;
Type ReturnType;
MethodInfo mi = m as MethodInfo;
PropertyInfo pi = m as PropertyInfo;
if (mi != null)
ReturnType = mi.ReturnType;
else if (pi != null)
ReturnType = pi.PropertyType;
else
return false;
//
// we use sig.RetType == null to mean `do not check the
// method return value.
//
if (sig.RetType != null) {
if (!TypeManager.IsEqual (ReturnType, sig.RetType))
return false;
}
Type [] args;
if (mi != null)
args = TypeManager.GetParameterData (mi).Types;
else
args = TypeManager.GetParameterData (pi).Types;
Type [] sigp = sig.Parameters;
if (args.Length != sigp.Length)
return false;
for (int i = args.Length - 1; i >= 0; i--)
if (!TypeManager.IsEqual (args [i], sigp [i]))
return false;
return true;
}
}
}
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