Permalink
Fetching contributors…
Cannot retrieve contributors at this time
54 lines (43 sloc) 1.89 KB
// Copyright (c) Josef Pihrt. All rights reserved. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Collections.Immutable;
using System.Linq;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Text;
namespace Roslynator.CSharp.Analysis
{
[DiagnosticAnalyzer(LanguageNames.CSharp)]
public class AvoidUsageOfWhileStatementToCreateInfiniteLoopAnalyzer : BaseDiagnosticAnalyzer
{
public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
{
get { return ImmutableArray.Create(DiagnosticDescriptors.AvoidUsageOfWhileStatementToCreateInfiniteLoop); }
}
public override void Initialize(AnalysisContext context)
{
if (context == null)
throw new ArgumentNullException(nameof(context));
base.Initialize(context);
context.RegisterSyntaxNodeAction(AnalyzeWhileStatement, SyntaxKind.WhileStatement);
}
public static void AnalyzeWhileStatement(SyntaxNodeAnalysisContext context)
{
var whileStatement = (WhileStatementSyntax)context.Node;
if (whileStatement.Condition?.Kind() != SyntaxKind.TrueLiteralExpression)
return;
TextSpan span = TextSpan.FromBounds(
whileStatement.OpenParenToken.Span.End,
whileStatement.CloseParenToken.SpanStart);
if (!whileStatement
.DescendantTrivia(span)
.All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
return;
}
context.ReportDiagnostic(DiagnosticDescriptors.AvoidUsageOfWhileStatementToCreateInfiniteLoop, whileStatement.WhileKeyword);
}
}
}