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Fix analyzer RCS1032 #1289

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merged 3 commits into from Nov 26, 2023
Merged

Fix analyzer RCS1032 #1289

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643fe6d
Fix analyzer RCS1032
josefpihrt Nov 26, 2023
551f3e2
update
josefpihrt Nov 26, 2023
32b4fdc
update
josefpihrt Nov 26, 2023
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1 change: 1 addition & 0 deletions ChangeLog.md
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Expand Up @@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- Fix analyzer [RCS1203](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1203) ([PR](https://github.com/dotnet/roslynator/pull/1282))
- Fix analyzer [RCS1046](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1046) ([PR](https://github.com/dotnet/roslynator/pull/1283))
- Fix analyzer [RCS1158](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1158) ([PR](https://github.com/dotnet/roslynator/pull/1288))
- Fix analyzer [RCS1032](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1032) ([PR](https://github.com/dotnet/roslynator/pull/1289))

## [4.6.4] - 2023-11-24

Expand Down
52 changes: 36 additions & 16 deletions src/Analyzers/CSharp/Analysis/RemoveRedundantParenthesesAnalyzer.cs
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Expand Up @@ -6,6 +6,7 @@
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Text;

namespace Roslynator.CSharp.Analysis;

Expand Down Expand Up @@ -83,7 +84,7 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
case SyntaxKind.SwitchStatement:
case SyntaxKind.ArrayRankSpecifier:
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
break;
}
case SyntaxKind.LessThanExpression:
Expand All @@ -97,7 +98,7 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
if (expression.IsKind(SyntaxKind.IdentifierName)
|| expression is LiteralExpressionSyntax)
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
}

break;
Expand All @@ -120,12 +121,12 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
if (kind == SyntaxKind.IdentifierName
|| expression is LiteralExpressionSyntax)
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
}
else if (kind == parentKind
&& ((BinaryExpressionSyntax)parent).Left == parenthesizedExpression)
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
}

break;
Expand All @@ -141,7 +142,7 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
case SyntaxKind.ElementAccessExpression:
case SyntaxKind.ConditionalAccessExpression:
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
break;
}
}
Expand All @@ -162,12 +163,12 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
{
if (((AssignmentExpressionSyntax)parent).Left == parenthesizedExpression)
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
}
else if (expression.IsKind(SyntaxKind.IdentifierName)
|| expression is LiteralExpressionSyntax)
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
}

break;
Expand All @@ -178,7 +179,7 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
&& !expression.DescendantNodes().Any(f => f.IsKind(SyntaxKind.AliasQualifiedName))
&& ((InterpolationSyntax)parent).Expression == parenthesizedExpression)
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
}

break;
Expand All @@ -189,15 +190,15 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
return;

if (CSharpFacts.GetOperatorPrecedence(expression.Kind()) <= CSharpFacts.GetOperatorPrecedence(SyntaxKind.AwaitExpression))
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);

break;
}
case SyntaxKind.ArrayInitializerExpression:
case SyntaxKind.CollectionInitializerExpression:
{
if (expression is not AssignmentExpressionSyntax)
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);

break;
}
Expand All @@ -215,7 +216,7 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
case SyntaxKind.AddAssignmentExpression:
case SyntaxKind.SubtractAssignmentExpression:
{
ReportDiagnostic();
ReportDiagnostic(context, parenthesizedExpression);
break;
}
#if DEBUG
Expand All @@ -231,16 +232,35 @@ private static void AnalyzeParenthesizedExpression(SyntaxNodeAnalysisContext con
}
}

void ReportDiagnostic()
static void ReportDiagnostic(SyntaxNodeAnalysisContext context, ParenthesizedExpressionSyntax parenthesizedExpression)
{
if (parenthesizedExpression.Expression.IsKind(SyntaxKind.LessThanExpression)
&& parenthesizedExpression.IsParentKind(SyntaxKind.Argument)
&& parenthesizedExpression.Parent.Parent is BaseArgumentListSyntax argumentList)
{
SeparatedSyntaxList<ArgumentSyntax> arguments = argumentList.Arguments;
int index = arguments.IndexOf((ArgumentSyntax)parenthesizedExpression.Parent);

if (index < arguments.Count - 1)
{
string syntax = parenthesizedExpression.Expression
+ argumentList.ToString(TextSpan.FromBounds(arguments[index].Span.End, arguments[index + 1].Span.End));

NameSyntax name = SyntaxFactory.ParseName(syntax);

if (name.IsKind(SyntaxKind.GenericName))
return;
}
}

DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.RemoveRedundantParentheses,
openParen.GetLocation(),
additionalLocations: ImmutableArray.Create(closeParen.GetLocation()));
parenthesizedExpression.OpenParenToken.GetLocation(),
additionalLocations: ImmutableArray.Create(parenthesizedExpression.CloseParenToken.GetLocation()));

DiagnosticHelpers.ReportToken(context, DiagnosticRules.RemoveRedundantParenthesesFadeOut, openParen);
DiagnosticHelpers.ReportToken(context, DiagnosticRules.RemoveRedundantParenthesesFadeOut, closeParen);
DiagnosticHelpers.ReportToken(context, DiagnosticRules.RemoveRedundantParenthesesFadeOut, parenthesizedExpression.OpenParenToken);
DiagnosticHelpers.ReportToken(context, DiagnosticRules.RemoveRedundantParenthesesFadeOut, parenthesizedExpression.CloseParenToken);
}
}
}
25 changes: 25 additions & 0 deletions src/Tests/Analyzers.Tests/RCS1032RemoveRedundantParenthesesTests.cs
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Expand Up @@ -589,6 +589,31 @@ async Task<string> M()
});
}
}
");
}

[Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.RemoveRedundantParentheses)]
public async Task TestNoDiagnostic_GrammarAmbiguity()
{
await VerifyNoDiagnosticAsync(@"
using System;

public class Foo
{
public static void F(bool p1, bool p2)
{
int x = 0;
int y = 0;
Bar d = null;
F((x < y), d > (d ?? d));
}
}

public class Bar
{
public static bool operator >(Bar left, Bar right) => throw new NotImplementedException();
public static bool operator <(Bar left, Bar right) => throw new NotImplementedException();
}
");
}
}