// 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>
/// Decrements an <see cref="Expression"/>, which should evaluate to a <see cref="VariableRef"/> (or a property or indexer access).
/// </summary>
public class Decrement : PreUnaryOperator
{
#region /* CONSTANTS */
/// <summary>
/// The internal name of the operator.
/// </summary>
public const string InternalName = NamePrefix + "Decrement";
#endregion
#region /* CONSTRUCTORS */
/// <summary>
/// Create a <see cref="Decrement"/> operator.
/// </summary>
public Decrement(Expression expression)
: base(expression)
{ }
#endregion
#region /* PROPERTIES */
/// <summary>
/// The symbol associated with the operator.
/// </summary>
public override string Symbol
{
get { return ParseToken; }
}
#endregion
#region /* METHODS */
/// <summary>
/// The internal name of the <see cref="UnaryOperator"/>.
/// </summary>
public override string GetInternalName()
{
return InternalName;
}
#endregion
#region /* PARSING */
/// <summary>
/// The token used to parse the code object.
/// </summary>
public const string ParseToken = "--";
/// <summary>
/// The precedence of the operator.
/// </summary>
public const int Precedence = 200;
/// <summary>
/// True if the operator is left-associative, or false if it's right-associative.
/// </summary>
public const bool LeftAssociative = true;
internal static new void AddParsePoints()
{
Parser.AddOperatorParsePoint(ParseToken, Precedence, LeftAssociative, true, Parse);
}
/// <summary>
/// Parse a <see cref="Decrement"/> operator.
/// </summary>
public static Decrement Parse(Parser parser, CodeObject parent, ParseFlags flags)
{
// If we have an unused left expression, abort
// (this is to give the PostDecrement operator a chance at parsing it)
if (parser.HasUnusedExpression)
return null;
return new Decrement(parser, parent);
}
protected Decrement(Parser parser, CodeObject parent)
: base(parser, parent, false)
{ }
/// <summary>
/// Get the precedence of the operator.
/// </summary>
public override int GetPrecedence()
{
return Precedence;
}
#endregion
}
}