/NRefactory/ICSharpCode.NRefactory.CSharp/Ast/Expressions/AssignmentExpression.cs
http://github.com/icsharpcode/ILSpy · C# · 304 lines · 228 code · 31 blank · 45 comment · 10 complexity · 3cb955bf039e7e1e33ac4b5fe3c87e71 MD5 · raw file
- //
- // AssignmentExpression.cs
- //
- // Author:
- // Mike Krüger <mkrueger@novell.com>
- //
- // Copyright (c) 2009 Novell, Inc (http://www.novell.com)
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy
- // of this software and associated documentation files (the "Software"), to deal
- // in the Software without restriction, including without limitation the rights
- // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- // copies of the Software, and to permit persons to whom the Software is
- // furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in
- // all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- // THE SOFTWARE.
- using System;
- using System.Linq.Expressions;
- using System.Collections.Generic;
- namespace ICSharpCode.NRefactory.CSharp
- {
- /// <summary>
- /// Left Operator= Right
- /// </summary>
- public class AssignmentExpression : Expression
- {
- // reuse roles from BinaryOperatorExpression
- public readonly static Role<Expression> LeftRole = BinaryOperatorExpression.LeftRole;
- public readonly static Role<Expression> RightRole = BinaryOperatorExpression.RightRole;
-
- public readonly static TokenRole AssignRole = new TokenRole ("=");
- public readonly static TokenRole AddRole = new TokenRole ("+=");
- public readonly static TokenRole SubtractRole = new TokenRole ("-=");
- public readonly static TokenRole MultiplyRole = new TokenRole ("*=");
- public readonly static TokenRole DivideRole = new TokenRole ("/=");
- public readonly static TokenRole ModulusRole = new TokenRole ("%=");
- public readonly static TokenRole ShiftLeftRole = new TokenRole ("<<=");
- public readonly static TokenRole ShiftRightRole = new TokenRole (">>=");
- public readonly static TokenRole BitwiseAndRole = new TokenRole ("&=");
- public readonly static TokenRole BitwiseOrRole = new TokenRole ("|=");
- public readonly static TokenRole ExclusiveOrRole = new TokenRole ("^=");
-
- public AssignmentExpression()
- {
- }
-
- public AssignmentExpression(Expression left, Expression right)
- {
- this.Left = left;
- this.Right = right;
- }
-
- public AssignmentExpression(Expression left, AssignmentOperatorType op, Expression right)
- {
- this.Left = left;
- this.Operator = op;
- this.Right = right;
- }
-
- public AssignmentOperatorType Operator {
- get;
- set;
- }
-
- public Expression Left {
- get { return GetChildByRole (LeftRole); }
- set { SetChildByRole(LeftRole, value); }
- }
-
- public CSharpTokenNode OperatorToken {
- get { return GetChildByRole (GetOperatorRole(Operator)); }
- }
-
- public Expression Right {
- get { return GetChildByRole (RightRole); }
- set { SetChildByRole(RightRole, value); }
- }
-
- public override void AcceptVisitor (IAstVisitor visitor)
- {
- visitor.VisitAssignmentExpression (this);
- }
-
- public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
- {
- return visitor.VisitAssignmentExpression (this);
- }
-
- public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
- {
- return visitor.VisitAssignmentExpression (this, data);
- }
-
- protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
- {
- AssignmentExpression o = other as AssignmentExpression;
- return o != null && (this.Operator == AssignmentOperatorType.Any || this.Operator == o.Operator)
- && this.Left.DoMatch(o.Left, match) && this.Right.DoMatch(o.Right, match);
- }
-
- public static TokenRole GetOperatorRole(AssignmentOperatorType op)
- {
- switch (op) {
- case AssignmentOperatorType.Assign:
- return AssignRole;
- case AssignmentOperatorType.Add:
- return AddRole;
- case AssignmentOperatorType.Subtract:
- return SubtractRole;
- case AssignmentOperatorType.Multiply:
- return MultiplyRole;
- case AssignmentOperatorType.Divide:
- return DivideRole;
- case AssignmentOperatorType.Modulus:
- return ModulusRole;
- case AssignmentOperatorType.ShiftLeft:
- return ShiftLeftRole;
- case AssignmentOperatorType.ShiftRight:
- return ShiftRightRole;
- case AssignmentOperatorType.BitwiseAnd:
- return BitwiseAndRole;
- case AssignmentOperatorType.BitwiseOr:
- return BitwiseOrRole;
- case AssignmentOperatorType.ExclusiveOr:
- return ExclusiveOrRole;
- default:
- throw new NotSupportedException("Invalid value for AssignmentOperatorType");
- }
- }
-
- /// <summary>
- /// Gets the binary operator for the specified compound assignment operator.
- /// Returns null if 'op' is not a compound assignment.
- /// </summary>
- public static BinaryOperatorType? GetCorrespondingBinaryOperator(AssignmentOperatorType op)
- {
- switch (op) {
- case AssignmentOperatorType.Assign:
- return null;
- case AssignmentOperatorType.Add:
- return BinaryOperatorType.Add;
- case AssignmentOperatorType.Subtract:
- return BinaryOperatorType.Subtract;
- case AssignmentOperatorType.Multiply:
- return BinaryOperatorType.Multiply;
- case AssignmentOperatorType.Divide:
- return BinaryOperatorType.Divide;
- case AssignmentOperatorType.Modulus:
- return BinaryOperatorType.Modulus;
- case AssignmentOperatorType.ShiftLeft:
- return BinaryOperatorType.ShiftLeft;
- case AssignmentOperatorType.ShiftRight:
- return BinaryOperatorType.ShiftRight;
- case AssignmentOperatorType.BitwiseAnd:
- return BinaryOperatorType.BitwiseAnd;
- case AssignmentOperatorType.BitwiseOr:
- return BinaryOperatorType.BitwiseOr;
- case AssignmentOperatorType.ExclusiveOr:
- return BinaryOperatorType.ExclusiveOr;
- default:
- throw new NotSupportedException("Invalid value for AssignmentOperatorType");
- }
- }
-
- public static ExpressionType GetLinqNodeType(AssignmentOperatorType op, bool checkForOverflow)
- {
- switch (op) {
- case AssignmentOperatorType.Assign:
- return ExpressionType.Assign;
- case AssignmentOperatorType.Add:
- return checkForOverflow ? ExpressionType.AddAssignChecked : ExpressionType.AddAssign;
- case AssignmentOperatorType.Subtract:
- return checkForOverflow ? ExpressionType.SubtractAssignChecked : ExpressionType.SubtractAssign;
- case AssignmentOperatorType.Multiply:
- return checkForOverflow ? ExpressionType.MultiplyAssignChecked : ExpressionType.MultiplyAssign;
- case AssignmentOperatorType.Divide:
- return ExpressionType.DivideAssign;
- case AssignmentOperatorType.Modulus:
- return ExpressionType.ModuloAssign;
- case AssignmentOperatorType.ShiftLeft:
- return ExpressionType.LeftShiftAssign;
- case AssignmentOperatorType.ShiftRight:
- return ExpressionType.RightShiftAssign;
- case AssignmentOperatorType.BitwiseAnd:
- return ExpressionType.AndAssign;
- case AssignmentOperatorType.BitwiseOr:
- return ExpressionType.OrAssign;
- case AssignmentOperatorType.ExclusiveOr:
- return ExpressionType.ExclusiveOrAssign;
- default:
- throw new NotSupportedException("Invalid value for AssignmentOperatorType");
- }
- }
- #region Builder methods
- public override MemberReferenceExpression Member(string memberName)
- {
- return new MemberReferenceExpression { Target = this, MemberName = memberName };
- }
- public override IndexerExpression Indexer(IEnumerable<Expression> arguments)
- {
- IndexerExpression expr = new IndexerExpression();
- expr.Target = new ParenthesizedExpression(this);
- expr.Arguments.AddRange(arguments);
- return expr;
- }
- public override IndexerExpression Indexer(params Expression[] arguments)
- {
- IndexerExpression expr = new IndexerExpression();
- expr.Target = new ParenthesizedExpression(this);
- expr.Arguments.AddRange(arguments);
- return expr;
- }
- public override InvocationExpression Invoke(string methodName, IEnumerable<AstType> typeArguments, IEnumerable<Expression> arguments)
- {
- InvocationExpression ie = new InvocationExpression();
- MemberReferenceExpression mre = new MemberReferenceExpression();
- mre.Target = new ParenthesizedExpression(this);
- mre.MemberName = methodName;
- mre.TypeArguments.AddRange(typeArguments);
- ie.Target = mre;
- ie.Arguments.AddRange(arguments);
- return ie;
- }
- public override InvocationExpression Invoke(IEnumerable<Expression> arguments)
- {
- InvocationExpression ie = new InvocationExpression();
- ie.Target = new ParenthesizedExpression(this);
- ie.Arguments.AddRange(arguments);
- return ie;
- }
- public override InvocationExpression Invoke(params Expression[] arguments)
- {
- InvocationExpression ie = new InvocationExpression();
- ie.Target = new ParenthesizedExpression(this);
- ie.Arguments.AddRange(arguments);
- return ie;
- }
- public override CastExpression CastTo(AstType type)
- {
- return new CastExpression { Type = type, Expression = new ParenthesizedExpression(this) };
- }
- public override AsExpression CastAs(AstType type)
- {
- return new AsExpression { Type = type, Expression = new ParenthesizedExpression(this) };
- }
- public override IsExpression IsType(AstType type)
- {
- return new IsExpression { Type = type, Expression = new ParenthesizedExpression(this) };
- }
- #endregion
- }
-
- public enum AssignmentOperatorType
- {
- /// <summary>left = right</summary>
- Assign,
-
- /// <summary>left += right</summary>
- Add,
- /// <summary>left -= right</summary>
- Subtract,
- /// <summary>left *= right</summary>
- Multiply,
- /// <summary>left /= right</summary>
- Divide,
- /// <summary>left %= right</summary>
- Modulus,
-
- /// <summary>left <<= right</summary>
- ShiftLeft,
- /// <summary>left >>= right</summary>
- ShiftRight,
-
- /// <summary>left &= right</summary>
- BitwiseAnd,
- /// <summary>left |= right</summary>
- BitwiseOr,
- /// <summary>left ^= right</summary>
- ExclusiveOr,
-
- /// <summary>Any operator (for pattern matching)</summary>
- Any
- }
- }