1 | // |
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2 | // LambdaHelper.cs |
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3 | // |
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4 | // Author: |
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5 | // Mansheng Yang <lightyang0@gmail.com> |
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6 | // |
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7 | // Copyright (c) 2012 Mansheng Yang <lightyang0@gmail.com> |
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8 | // |
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9 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
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10 | // of this software and associated documentation files (the "Software"), to deal |
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11 | // in the Software without restriction, including without limitation the rights |
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12 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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13 | // copies of the Software, and to permit persons to whom the Software is |
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14 | // furnished to do so, subject to the following conditions: |
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15 | // |
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16 | // The above copyright notice and this permission notice shall be included in |
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17 | // all copies or substantial portions of the Software. |
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18 | // |
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19 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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20 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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21 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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22 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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23 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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24 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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25 | // THE SOFTWARE. |
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26 | |
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27 | using System.Linq; |
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28 | using ICSharpCode.NRefactory.Semantics; |
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29 | using ICSharpCode.NRefactory.CSharp.Resolver; |
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30 | using ICSharpCode.NRefactory.TypeSystem; |
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31 | |
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32 | namespace ICSharpCode.NRefactory.CSharp.Refactoring |
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33 | { |
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34 | public class LambdaHelper |
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35 | { |
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36 | public static IType GetLambdaReturnType(RefactoringContext context, LambdaExpression lambda) |
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37 | { |
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38 | LambdaResolveResult rr = context.Resolve(lambda) as LambdaResolveResult; |
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39 | if (rr == null) |
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40 | return SpecialType.UnknownType; |
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41 | if (rr.IsAsync) { |
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42 | // Unpack Task<T> |
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43 | if (rr.ReturnType.IsKnownType(KnownTypeCode.Task)) |
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44 | return context.Compilation.FindType(KnownTypeCode.Void); |
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45 | else if (rr.ReturnType.IsKnownType(KnownTypeCode.TaskOfT) && rr.ReturnType.IsParameterized) |
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46 | return rr.ReturnType.TypeArguments[0]; |
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47 | } |
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48 | return rr.ReturnType; |
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49 | } |
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50 | } |
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51 | } |
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