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Do not suggest passing IFormatProvider to certain Convert methods #7244

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merged 3 commits into from
Aug 30, 2024
Merged

Do not suggest passing IFormatProvider to certain Convert methods #7244

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233b8d4
Do not suggest passing IFormatProvider to certain Convert methods
CollinAlpert Mar 13, 2024
f92614a
Merge branch 'main' into issue-7154
CollinAlpert Aug 30, 2024
65a0697
Implement PR suggestions
CollinAlpert Aug 30, 2024
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22 changes: 21 additions & 1 deletion src/NetAnalyzers/Core/Microsoft.NetCore.Analyzers/Runtime/SpecifyIFormatProvider.cs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
// Copyright (c) Microsoft. All Rights Reserved. Licensed under the MIT license. See License.txt in the project root for license information.

using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
Expand Down Expand Up @@ -151,6 +152,25 @@ protected override void InitializeWorker(CompilationStartAnalysisContext context

var guidParseMethods = guidType?.GetMembers("Parse") ?? ImmutableArray<ISymbol>.Empty;

var convertType = typeProvider.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemConvert);
ImmutableHashSet<IMethodSymbol> superfluousFormatProviderOverloads = ImmutableHashSet<IMethodSymbol>.Empty;
if (convertType != null)
{
superfluousFormatProviderOverloads = convertType.GetMembers(nameof(Convert.ToString))
.OfType<IMethodSymbol>()
.Where(m => m.Parameters is [{ Type.SpecialType: SpecialType.System_String or SpecialType.System_Boolean or SpecialType.System_Char }, var possibleFormatProvider]
&& possibleFormatProvider.Type.Equals(iformatProviderType, SymbolEqualityComparer.Default)).ToImmutableHashSet();
superfluousFormatProviderOverloads = superfluousFormatProviderOverloads
.Add(convertType.GetMembers(nameof(Convert.ToChar))
.OfType<IMethodSymbol>()
.First(m => m.Parameters is [{ Type.SpecialType: SpecialType.System_String }, var possibleFormatProvider]
&& possibleFormatProvider.Type.Equals(iformatProviderType, SymbolEqualityComparer.Default)))
.Add(convertType.GetMembers(nameof(Convert.ToBoolean))
.OfType<IMethodSymbol>()
.First(m => m.Parameters is [{ Type.SpecialType: SpecialType.System_String }, var possibleFormatProvider]
&& possibleFormatProvider.Type.Equals(iformatProviderType, SymbolEqualityComparer.Default)));
}

#endregion

context.RegisterOperationAction(oaContext =>
Expand Down Expand Up @@ -211,7 +231,7 @@ protected override void InitializeWorker(CompilationStartAnalysisContext context

// Sample message for IFormatProviderAlternateRule: Because the behavior of Convert.ToInt64(string) could vary based on the current user's locale settings,
// replace this call in IFormatProviderStringTest.TestMethod() with a call to Convert.ToInt64(string, IFormatProvider).
if (correctOverload != null)
if (correctOverload != null && !superfluousFormatProviderOverloads.Contains(correctOverload))
{
oaContext.ReportDiagnostic(
invocationExpression.Syntax.CreateDiagnostic(
Expand Down
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