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Dec 12, 2024
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Merged

Handle semi-auto properties with expression bodies #1026

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8 changes: 6 additions & 2 deletions ...SourceGenerators/Diagnostics/Analyzers/UseObservablePropertyOnSemiAutoPropertyAnalyzer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -249,8 +249,12 @@ public override void Initialize(AnalysisContext context)
}

// Check that either of them is a semicolon token 'get;' accessor (it can be in either position)
if (firstAccessor.IsKind(SyntaxKind.GetAccessorDeclaration) && firstAccessor.SemicolonToken.IsKind(SyntaxKind.SemicolonToken) ||
secondAccessor.IsKind(SyntaxKind.GetAccessorDeclaration) && secondAccessor.SemicolonToken.IsKind(SyntaxKind.SemicolonToken))
if (firstAccessor.IsKind(SyntaxKind.GetAccessorDeclaration) &&
firstAccessor.SemicolonToken.IsKind(SyntaxKind.SemicolonToken) &&
firstAccessor.ExpressionBody is null ||
secondAccessor.IsKind(SyntaxKind.GetAccessorDeclaration) &&
secondAccessor.SemicolonToken.IsKind(SyntaxKind.SemicolonToken) &&
secondAccessor.ExpressionBody is null)
{
validFlags[0] = true;
}
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21 changes: 21 additions & 0 deletions ...ityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests/Test_SourceGeneratorsDiagnostics.cs
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Expand Up @@ -1403,6 +1403,27 @@ public string Name
await CSharpAnalyzerWithLanguageVersionTest<UseObservablePropertyOnSemiAutoPropertyAnalyzer>.VerifyAnalyzerAsync(source, LanguageVersion.Preview);
}

[TestMethod]
public async Task UseObservablePropertyOnSemiAutoPropertyAnalyzer_GetAccessorWithExpressionBody_DoesNotWarn()
{
const string source = """
using CommunityToolkit.Mvvm.ComponentModel;

namespace MyApp;

public partial class SampleViewModel : ObservableObject
{
public string Name
{
get => "Hello world";
set => SetProperty(ref field, value);
}
}
""";

await CSharpAnalyzerWithLanguageVersionTest<UseObservablePropertyOnSemiAutoPropertyAnalyzer>.VerifyAnalyzerAsync(source, LanguageVersion.Preview);
}

[TestMethod]
public async Task UseObservablePropertyOnSemiAutoPropertyAnalyzer_ValidProperty_Warns()
{
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