private static void OnCompilationStart(CompilationStartAnalysisContext context)
{
ImmutableHashSet <IMethodSymbol> .Builder syncMethods = ImmutableHashSet.CreateBuilder <IMethodSymbol>();
ImmutableHashSet <IMethodSymbol> .Builder asyncMethods = ImmutableHashSet.CreateBuilder <IMethodSymbol>();
INamedTypeSymbol? namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemLinqEnumerable);
IEnumerable <IMethodSymbol>?methods = namedType?.GetMembers(Count).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(syncMethods, methods);
methods = namedType?.GetMembers(LongCount).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(syncMethods, methods);
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemLinqQueryable);
methods = namedType?.GetMembers(Count).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(syncMethods, methods);
methods = namedType?.GetMembers(LongCount).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(syncMethods, methods);
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.MicrosoftEntityFrameworkCoreEntityFrameworkQueryableExtensions);
methods = namedType?.GetMembers(CountAsync).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(asyncMethods, methods);
methods = namedType?.GetMembers(LongCountAsync).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(asyncMethods, methods);
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemDataEntityQueryableExtensions);
methods = namedType?.GetMembers(CountAsync).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(asyncMethods, methods);
methods = namedType?.GetMembers(LongCountAsync).OfType <IMethodSymbol>().Where(m => m.Parameters.Length <= 2);
AddIfNotNull(asyncMethods, methods);
// Allowed types that should report a CA1836 diagnosis given that there is proven benefit on doing so.
ImmutableHashSet <ITypeSymbol> .Builder allowedTypesBuilder = ImmutableHashSet.CreateBuilder <ITypeSymbol>();
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemCollectionsConcurrentConcurrentBag1);
allowedTypesBuilder.AddIfNotNull(namedType);
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemCollectionsConcurrentConcurrentDictionary2);
allowedTypesBuilder.AddIfNotNull(namedType);
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemCollectionsConcurrentConcurrentQueue1);
allowedTypesBuilder.AddIfNotNull(namedType);
namedType = context.Compilation.GetOrCreateTypeByMetadataName(WellKnownTypeNames.SystemCollectionsConcurrentConcurrentStack1);
allowedTypesBuilder.AddIfNotNull(namedType);
ImmutableHashSet <ITypeSymbol> allowedTypesForCA1836 = allowedTypesBuilder.ToImmutable();
if (syncMethods.Count > 0 || asyncMethods.Count > 0)
{
context.RegisterOperationAction(operationContext => AnalyzeInvocationOperation(
operationContext, syncMethods.ToImmutable(), asyncMethods.ToImmutable(), allowedTypesForCA1836),
OperationKind.Invocation);
}
if (!allowedTypesForCA1836.IsEmpty)
{
context.RegisterOperationAction(operationContext => AnalyzePropertyReference(
operationContext, allowedTypesForCA1836),
OperationKind.PropertyReference);
}
