// // LocalVariableOnlyAssignedIssue.cs // // Author: // Mansheng Yang // // Copyright (c) 2012 Mansheng Yang // // 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")); } } } }