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Fix S3963 FP: Static constructor with conditional and no static filed initialization #9512

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merged 3 commits into from
Jul 11, 2024
Merged

Fix S3963 FP: Static constructor with conditional and no static filed initialization #9512

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sebastien-marichal Jul 9, 2024
c8b617e
Fix S3963 FP: Static constructor with conditional and no static filed…
sebastien-marichal Jul 9, 2024
789f38c
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sebastien-marichal Jul 11, 2024
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10 changes: 0 additions & 10 deletions analyzers/its/expected/akka.net/S3963-Akka.Cluster-netstandard2.0.json
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75 changes: 37 additions & 38 deletions analyzers/src/SonarAnalyzer.CSharp/Rules/InitializeStaticFieldsInline.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,49 +18,48 @@
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

namespace SonarAnalyzer.Rules.CSharp
namespace SonarAnalyzer.Rules.CSharp;

[DiagnosticAnalyzer(LanguageNames.CSharp)]
public sealed class InitializeStaticFieldsInline : SonarDiagnosticAnalyzer
{
[DiagnosticAnalyzer(LanguageNames.CSharp)]
public sealed class InitializeStaticFieldsInline : SonarDiagnosticAnalyzer
{
private const string DiagnosticId = "S3963";
private const string MessageFormat = "Initialize all 'static fields' inline and remove the 'static constructor'.";
private const string DiagnosticId = "S3963";
private const string MessageFormat = "Initialize all 'static fields' inline and remove the 'static constructor'.";

private static readonly DiagnosticDescriptor Rule = DescriptorFactory.Create(DiagnosticId, MessageFormat);
private static readonly DiagnosticDescriptor Rule = DescriptorFactory.Create(DiagnosticId, MessageFormat);

public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; } = ImmutableArray.Create(Rule);
public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; } = ImmutableArray.Create(Rule);

protected override void Initialize(SonarAnalysisContext context) =>
context.RegisterNodeAction(c =>
protected override void Initialize(SonarAnalysisContext context) =>
context.RegisterNodeAction(c =>
{
var constructor = (ConstructorDeclarationSyntax)c.Node;
if (!constructor.Modifiers.Any(SyntaxKind.StaticKeyword)
|| (constructor.Body is null && constructor.ExpressionBody() is null))
{
var constructor = (ConstructorDeclarationSyntax)c.Node;
if (!constructor.Modifiers.Any(SyntaxKind.StaticKeyword)
|| (constructor.Body == null && constructor.ExpressionBody() == null))
{
return;
}
if (c.SemanticModel.GetDeclaredSymbol(constructor).ContainingType is { } currentType)
{
var bodyDescendantNodes = constructor.Body?.DescendantNodes().ToArray()
?? constructor.ExpressionBody()?.DescendantNodes().ToArray()
?? Array.Empty<SyntaxNode>();
return;
}
if (c.SemanticModel.GetDeclaredSymbol(constructor).ContainingType is { } currentType)
{
var bodyDescendantNodes = constructor.Body?.DescendantNodes().ToArray()
?? constructor.ExpressionBody()?.DescendantNodes().ToArray()
?? [];

var assignedFieldCount = bodyDescendantNodes
.OfType<AssignmentExpressionSyntax>()
.Select(x => c.SemanticModel.GetSymbolInfo(x.Left).Symbol)
.OfType<IFieldSymbol>()
.Where(x => x.ContainingType.Equals(currentType))
.Select(x => x.Name)
.Distinct()
.Count();
var hasIfOrSwitch = bodyDescendantNodes.Any(x => x.IsAnyKind(SyntaxKind.IfStatement, SyntaxKind.SwitchStatement));
if ((hasIfOrSwitch && assignedFieldCount <= 1)
|| (!hasIfOrSwitch && assignedFieldCount > 0))
{
c.ReportIssue(Rule, constructor.Identifier);
}
var assignedFieldCount = bodyDescendantNodes
.OfType<AssignmentExpressionSyntax>()
.Select(x => c.SemanticModel.GetSymbolInfo(x.Left).Symbol)
.OfType<IFieldSymbol>()
.Where(x => x.ContainingType.Equals(currentType))
.Select(x => x.Name)
.Distinct()
.Count();
var hasIfOrSwitch = Array.Exists(bodyDescendantNodes, x => x.IsAnyKind(SyntaxKind.IfStatement, SyntaxKind.SwitchStatement));
if ((hasIfOrSwitch && assignedFieldCount == 1)
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one line :)

|| (!hasIfOrSwitch && assignedFieldCount > 0))
{
c.ReportIssue(Rule, constructor.Identifier);
}
},
SyntaxKind.ConstructorDeclaration);
}
}
},
SyntaxKind.ConstructorDeclaration);
}
2 changes: 1 addition & 1 deletion analyzers/tests/SonarAnalyzer.Test/TestCases/InitializeStaticFieldsInline.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -165,7 +165,7 @@ static ReproSwitchMulti() // Compliant, because there are multiple variable a
public static class TestUtil
{
// https://github.com/SonarSource/sonar-dotnet/issues/6343
static TestUtil() // Noncompliant - FP, there are no static fields
static TestUtil() // Compliant
{
if (!Directory.Exists(""))
{
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