// The Nova Project by Ken Beckett.
// Copyright (C) 2007-2012 Inevitable Software, all rights reserved.
// Released under the Common Development and Distribution License, CDDL-1.0: http://opensource.org/licenses/cddl1.php
using Nova.Parsing;
namespace Nova.CodeDOM
{
/// <summary>
/// Represents a non-conditional alternative portion of an <see cref="If"/> or <see cref="ElseIf"/> (as a child of one of those object types).
/// </summary>
public class Else : BlockStatement
{
#region /* CONSTRUCTORS */
/// <summary>
/// Create an <see cref="Else"/>.
/// </summary>
public Else(CodeObject body)
: base(body, false)
{ }
/// <summary>
/// Create an <see cref="Else"/>.
/// </summary>
public Else()
: base(null, false)
{ }
#endregion
#region /* PROPERTIES */
/// <summary>
/// The keyword associated with the <see cref="Statement"/>.
/// </summary>
public override string Keyword
{
get { return ParseToken; }
}
#endregion
#region /* PARSING */
/// <summary>
/// The token used to parse the code object.
/// </summary>
public const string ParseToken = "else";
internal static void AddParsePoints()
{
// Normally, an 'else' is parsed by the 'if' parse logic (see IfBase).
// This parse-point exists only to catch an orphaned 'else' statement.
// Use a parse-priority of 200 (ElseIf uses 100)
Parser.AddParsePoint(ParseToken, 200, ParseOrphan, typeof(IBlock));
}
/// <summary>
/// Parse an orphaned <see cref="Else"/>.
/// </summary>
public static Else ParseOrphan(Parser parser, CodeObject parent, ParseFlags flags)
{
Token token = parser.Token;
Else @else = Parse(parser, parent);
parser.AttachMessage(@else, "Orphaned 'else' - missing parent 'if'", token);
return @else;
}
/// <summary>
/// Parse an <see cref="Else"/>.
/// </summary>
public static Else Parse(Parser parser, CodeObject parent)
{
return new Else(parser, parent);
}
protected Else(Parser parser, CodeObject parent)
: base(parser, parent)
{
MoveComments(parser.LastToken); // Get any comments before 'else'
parser.NextToken(); // Move past 'else'
new Block(out _body, parser, this, false); // Parse the body
ParseUnusedAnnotations(parser, this, true); // Parse any annotations from the Unused list
// Remove any preceeding blank lines if auto-cleanup is on
if (AutomaticFormattingCleanup && NewLines > 1)
NewLines = 1;
}
#endregion
#region /* RESOLVING */
public override void ResolveRefUp(string name, Resolving.Resolver resolver)
{
if (_body != null)
{
_body.ResolveRef(name, resolver);
if (resolver.HasCompleteMatch) return; // Abort if we found a match
}
// Skip past any If/ElseIf parent (we don't want to match anything in its body)
if (_parent is IfBase && _parent.Parent != null)
_parent.Parent.ResolveRefUp(name, resolver);
else if (_parent != null)
_parent.ResolveRefUp(name, resolver);
}
#endregion
#region /* FORMATTING */
/// <summary>
/// True if the <see cref="Statement"/> has an argument.
/// </summary>
public override bool HasArgument
{
get { return false; }
}
/// <summary>
/// True if the <see cref="BlockStatement"/> always requires braces.
/// </summary>
public override bool HasBracesAlways
{
get { return false; }
}
#endregion
}
}