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Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/CastExpressionOfIncompatibleTypeIssue.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/CastExpressionOfIncompatibleTypeIssue.cs
 
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// 
 
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// CastExpressionOfIncompatibleTypeIssue.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.Collections.Generic;
 
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using ICSharpCode.NRefactory.TypeSystem;
 
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using ICSharpCode.NRefactory.CSharp.Resolver;
 
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using ICSharpCode.NRefactory.Semantics;
 
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namespace ICSharpCode.NRefactory.CSharp.Refactoring
 
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{
 
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        [IssueDescription ("Type cast expression of incompatible type",
 
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                                           Description = "Type cast expression of incompatible type",
 
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                                           Category = IssueCategories.CodeQualityIssues,
 
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                                           Severity = Severity.Warning,
 
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                                           IssueMarker = IssueMarker.Underline)]
 
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        public class CastExpressionOfIncompatibleTypeIssue : ICodeIssueProvider
 
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        {
 
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                public IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context)
 
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                {
 
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                        return new GatherVisitor (context).GetIssues ();
 
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                }
 
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                class GatherVisitor : GatherVisitorBase<CastExpressionOfIncompatibleTypeIssue>
 
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                {
 
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                        readonly CSharpConversions conversion;
 
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                        public GatherVisitor (BaseRefactoringContext ctx)
 
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                                : base (ctx)
 
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                        {
 
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                                conversion = new CSharpConversions(ctx.Compilation);
 
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                        }
 
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                        public override void VisitCastExpression (CastExpression castExpression)
 
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                        {
 
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                                base.VisitCastExpression (castExpression);
 
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                                VisitTypeCastExpression (castExpression, ctx.Resolve (castExpression.Expression).Type,
 
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                                        ctx.ResolveType (castExpression.Type));
 
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                        }
 
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                        public override void VisitAsExpression (AsExpression asExpression)
 
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                        {
 
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                                base.VisitAsExpression (asExpression);
 
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                                VisitTypeCastExpression (asExpression, ctx.Resolve (asExpression.Expression).Type,
 
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                                        ctx.ResolveType (asExpression.Type));
 
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                        }
 
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                        void VisitTypeCastExpression (Expression expression, IType exprType, IType castToType)
 
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                        {
 
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                                if (exprType.Kind == TypeKind.Unknown || castToType.Kind == TypeKind.Unknown)
 
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                                        return;
 
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                                var foundConversion = conversion.ExplicitConversion(exprType, castToType);
 
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                                if (foundConversion == Conversion.None)
 
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                                        AddIssue (expression, ctx.TranslateString ("Type cast expression of incompatible type"));
 
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                        }
 
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                }
 
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        }
 
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}