105 lines
2.8 KiB
C#
105 lines
2.8 KiB
C#
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//
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// LambdaExpression.cs
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//
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// Author:
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// Jb Evain (jbevain@novell.com)
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// Miguel de Icaza (miguel@novell.com)
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//
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// (C) 2008 Novell, Inc. (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.ObjectModel;
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using System.Collections.Generic;
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using System.Reflection;
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#if !FULL_AOT_RUNTIME
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using System.Reflection.Emit;
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#endif
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namespace System.Linq.Expressions {
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public class LambdaExpression : Expression {
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Expression body;
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ReadOnlyCollection<ParameterExpression> parameters;
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public Expression Body {
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get { return body; }
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}
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public ReadOnlyCollection<ParameterExpression> Parameters {
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get { return parameters; }
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}
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internal LambdaExpression (Type delegateType, Expression body, ReadOnlyCollection<ParameterExpression> parameters)
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: base (ExpressionType.Lambda, delegateType)
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{
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this.body = body;
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this.parameters = parameters;
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}
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#if !FULL_AOT_RUNTIME
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void EmitPopIfNeeded (EmitContext ec)
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{
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if (GetReturnType () == typeof (void) && body.Type != typeof (void))
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ec.ig.Emit (OpCodes.Pop);
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}
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internal override void Emit (EmitContext ec)
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{
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ec.EmitCreateDelegate (this);
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}
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internal void EmitBody (EmitContext ec)
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{
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body.Emit (ec);
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EmitPopIfNeeded (ec);
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ec.ig.Emit (OpCodes.Ret);
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}
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#endif
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internal Type GetReturnType ()
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{
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return this.Type.GetInvokeMethod ().ReturnType;
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}
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public Delegate Compile ()
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{
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#if FULL_AOT_RUNTIME
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return new System.Linq.jvm.Runner (this).CreateDelegate ();
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#else
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var context = new CompilationContext ();
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context.AddCompilationUnit (this);
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return context.CreateDelegate ();
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#endif
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}
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#if FULL_AOT_RUNTIME
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internal Delegate Compile (System.Linq.jvm.ExpressionInterpreter interpreter)
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{
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return new System.Linq.jvm.Runner (this, interpreter).CreateDelegate ();
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}
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#endif
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}
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}
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