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//
// LocalVariableOnlyAssignedIssue.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 ICSharpCode.NRefactory.Semantics;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
[IssueDescription ("Local variable is only assigned",
Description = "Local variable is assigned by its value is never used",
Category = IssueCategories.CodeQualityIssues,
Severity = Severity.Warning,
IssueMarker = IssueMarker.Underline)]
public class LocalVariableOnlyAssignedIssue : VariableOnlyAssignedIssue
{
internal override GatherVisitorBase GetGatherVisitor (BaseRefactoringContext ctx, SyntaxTree unit)
{
return new GatherVisitor (ctx, unit);
}
class GatherVisitor : GatherVisitorBase
{
SyntaxTree unit;
public GatherVisitor (BaseRefactoringContext ctx, SyntaxTree unit)
: base (ctx)
{
this.unit = unit;
}
public override void VisitVariableInitializer (VariableInitializer variableInitializer)
{
base.VisitVariableInitializer (variableInitializer);
var decl = variableInitializer.Parent as VariableDeclarationStatement;
if (decl == null)
return;
var resolveResult = ctx.Resolve (variableInitializer) as LocalResolveResult;
if (resolveResult == null)
return;
if (!TestOnlyAssigned (ctx, unit, resolveResult.Variable))
return;
AddIssue (variableInitializer.NameToken,
ctx.TranslateString ("Local variable is assigned by its value is never used"));
}
}
}
}