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//
// 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.Semantics;
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)
{
LambdaResolveResult rr = context.Resolve(lambda) as LambdaResolveResult;
if (rr == null)
return SpecialType.UnknownType;
if (rr.IsAsync) {
// Unpack Task<T>
if (rr.ReturnType.IsKnownType(KnownTypeCode.Task))
return context.Compilation.FindType(KnownTypeCode.Void);
else if (rr.ReturnType.IsKnownType(KnownTypeCode.TaskOfT) && rr.ReturnType.IsParameterized)
return rr.ReturnType.TypeArguments[0];
}
return rr.ReturnType;
}
}
}
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