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//
// RedundantCaseLabelIssue.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.Collections.Generic;
using ICSharpCode.NRefactory.Refactoring;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
[IssueDescription ("Redundant 'case' label",
Description = "'case' label is redundant.",
Category = IssueCategories.Redundancies,
Severity = Severity.Warning,
IssueMarker = IssueMarker.GrayOut,
ResharperDisableKeyword = "RedundantCaseLabel")]
public class RedundantCaseLabelIssue : ICodeIssueProvider
{
public IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context)
{
return new GatherVisitor (context).GetIssues ();
}
class GatherVisitor : GatherVisitorBase<RedundantCaseLabelIssue>
{
public GatherVisitor(BaseRefactoringContext ctx)
: base (ctx)
{
}
public override void VisitSwitchSection (SwitchSection switchSection)
{
base.VisitSwitchSection (switchSection);
if (switchSection.CaseLabels.Count <2)
return;
var lastLabel = switchSection.CaseLabels.LastOrNullObject ();
if (!lastLabel.Expression.IsNull)
return;
AddIssue (switchSection.FirstChild.StartLocation, lastLabel.StartLocation,
ctx.TranslateString ("Remove redundant 'case' label"), scipt => {
foreach (var label in switchSection.CaseLabels) {
if (label != lastLabel)
scipt.Remove (label);
}
});
}
}
}
}
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