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58 lines
2.3 KiB
58 lines
2.3 KiB
// |
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// LambdaHelper.cs |
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// |
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// Author: |
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// Mansheng Yang <lightyang0@gmail.com> |
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// |
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// Copyright (c) 2012 Mansheng Yang <lightyang0@gmail.com> |
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// |
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// Permission is hereby granted, free of charge, to any person obtaining a copy |
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// of this software and associated documentation files (the "Software"), to deal |
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// in the Software without restriction, including without limitation the rights |
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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// copies of the Software, and to permit persons to whom the Software is |
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// furnished to do so, subject to the following conditions: |
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// |
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// The above copyright notice and this permission notice shall be included in |
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// 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, EXPRESS OR |
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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// THE SOFTWARE. |
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using System.Linq; |
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using ICSharpCode.NRefactory.CSharp.Resolver; |
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using ICSharpCode.NRefactory.TypeSystem; |
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namespace ICSharpCode.NRefactory.CSharp.Refactoring |
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{ |
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public class LambdaHelper |
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{ |
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public static IType GetLambdaReturnType(RefactoringContext context, LambdaExpression lambda) |
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{ |
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var parent = lambda.Parent; |
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while (parent is ParenthesizedExpression) |
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parent = parent.Parent; |
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ITypeDefinition delegateTypeDef; |
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if (parent is InvocationExpression) { |
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var invocation = (InvocationExpression)parent; |
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var argIndex = invocation.Arguments.TakeWhile (arg => !arg.Contains (lambda.StartLocation)).Count (); |
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var resolveResult = (CSharpInvocationResolveResult)context.Resolve (invocation); |
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delegateTypeDef = resolveResult.Arguments [argIndex].Type.GetDefinition (); |
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} else { |
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delegateTypeDef = context.Resolve (parent).Type.GetDefinition (); |
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} |
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if (delegateTypeDef == null) |
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return null; |
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var invokeMethod = delegateTypeDef.GetMethods (m => m.Name == "Invoke").FirstOrDefault (); |
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if (invokeMethod == null) |
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return null; |
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return invokeMethod.ReturnType; |
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} |
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} |
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}
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