.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 

58 lines
2.3 KiB

//
// LambdaHelper.cs
//
// Author:
// Mansheng Yang <lightyang0@gmail.com>
//
// Copyright (c) 2012 Mansheng Yang <lightyang0@gmail.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.Linq;
using ICSharpCode.NRefactory.CSharp.Resolver;
using ICSharpCode.NRefactory.TypeSystem;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
public class LambdaHelper
{
public static IType GetLambdaReturnType(RefactoringContext context, LambdaExpression lambda)
{
var parent = lambda.Parent;
while (parent is ParenthesizedExpression)
parent = parent.Parent;
ITypeDefinition delegateTypeDef;
if (parent is InvocationExpression) {
var invocation = (InvocationExpression)parent;
var argIndex = invocation.Arguments.TakeWhile (arg => !arg.Contains (lambda.StartLocation)).Count ();
var resolveResult = (CSharpInvocationResolveResult)context.Resolve (invocation);
delegateTypeDef = resolveResult.Arguments [argIndex].Type.GetDefinition ();
} else {
delegateTypeDef = context.Resolve (parent).Type.GetDefinition ();
}
if (delegateTypeDef == null)
return null;
var invokeMethod = delegateTypeDef.GetMethods (m => m.Name == "Invoke").FirstOrDefault ();
if (invokeMethod == null)
return null;
return invokeMethod.ReturnType;
}
}
}