private void AnalyzeMethod(SymbolAnalysisContext context)
{
context.TryGetSemanticModel(out var semanticModel);
var method = (IMethodSymbol)context.Symbol;
if (IsOverridenMethod(method) || method.IsAsyncOrTaskBased(context.Compilation) || method.IsIteratorBlock())
{
// If the method overrides a base method or implements an interface,
// then we can't enforce 'in'-modifier
return;
}
var largeStructThreshold = Settings.GetLargeStructThresholdOrDefault(context.TryGetAnalyzerConfigOptions());
// Should analyze only subset of methods, not all of them.
if (method.MethodKind == MethodKind.Ordinary || method.MethodKind == MethodKind.AnonymousFunction ||
method.MethodKind == MethodKind.LambdaMethod || method.MethodKind == MethodKind.LocalFunction ||
method.MethodKind == MethodKind.PropertyGet || method.MethodKind == MethodKind.UserDefinedOperator)
{
foreach (var p in method.Parameters)
{
if (!ParameterIsCapturedByAnonymousMethod(p, method, semanticModel))
{
WarnIfParameterIsReadOnly(context.Compilation, largeStructThreshold, p, diagnostic => context.ReportDiagnostic(diagnostic));
}
}
}
}
private void AnalyzeNamedType(SymbolAnalysisContext context)
{
var symbol = (INamedTypeSymbol)context.Symbol;
if (symbol.TypeKind != TypeKind.Delegate)
{
// We're interested only in 'delegate void FooBar(MyStruct s);' cases.
return;
}
if (symbol.DelegateInvokeMethod is null || symbol.DelegateInvokeMethod.Parameters.IsEmpty)
{
// No need to do any work if there are no parameters
return;
}
var largeStructThreshold = Settings.GetLargeStructThresholdOrDefault(context.TryGetAnalyzerConfigOptions());
foreach (var parameterSymbol in symbol.DelegateInvokeMethod.Parameters)
{
WarnIfParameterIsReadOnly(context.Compilation, largeStructThreshold, parameterSymbol, diagnostic => context.ReportDiagnostic(diagnostic));
}
}
