protected static void AnalyzeEnumICollectionProperty(SyntaxNodeAnalysisContext context,
ExpressionStatementSyntax expression)
{
if (!AnalyzerUtils.LastNodeIsInvocationExpressionSyntax(expression, out var invocationExpressionSyntax))
{
return;
}
var methodSymbol = context
.SemanticModel
.GetSymbolInfo(invocationExpressionSyntax, context.CancellationToken)
.Symbol as IMethodSymbol;
if (methodSymbol == null || !methodSymbol.IsGenericMethod || methodSymbol.Name != "Property")
{
return;
}
var returnTypeSymbol = methodSymbol.ReturnType;
var iCollectionTypeSymbol = ((INamedTypeSymbol)returnTypeSymbol).TypeArguments.FirstOrDefault();
if (iCollectionTypeSymbol?.Name != nameof(ICollection))
{
return;
}
var enumTypeSymbol = (iCollectionTypeSymbol as INamedTypeSymbol).TypeArguments.FirstOrDefault();
if (enumTypeSymbol?.TypeKind != TypeKind.Enum)
{
return;
}
var enumMembers = enumTypeSymbol.GetMembers()
.Where(m => m.Kind == SymbolKind.Field)
.ToList();
if (!enumMembers.Any())
{
return;
}
var diagnostic = Diagnostic.Create(Rule, invocationExpressionSyntax.GetLocation(), methodSymbol.Name);
context.ReportDiagnostic(diagnostic);
}
protected static void AnalyzeQueryableSelectInvocation(SyntaxNodeAnalysisContext context, ExpressionStatementSyntax expression)
{
if (!AnalyzerUtils.LastNodeIsInvocationExpressionSyntax(expression, out var invocationExpressionSyntax))
{
return;
}
var methodSymbol = context
.SemanticModel
.GetSymbolInfo(invocationExpressionSyntax, context.CancellationToken)
.Symbol as IMethodSymbol;
if (methodSymbol == null || !methodSymbol.IsGenericMethod || methodSymbol.Name == "Select")
{
return;
}
var returnTypeSymbol = methodSymbol.ReturnType;
var genericTypeSymbol = ((INamedTypeSymbol)returnTypeSymbol).TypeArguments.First();
bool genericTypeHasProperties = genericTypeSymbol
.GetMembers().Any(m => m.Kind == SymbolKind.Property);
if (!genericTypeHasProperties)
{
return;
}
var compilation = context.Compilation;
var iQueryableType = compilation.GetTypeByMetadataName("System.Linq.IQueryable`1");
var areEqual = SymbolEqualityComparer.Default.Equals(iQueryableType, returnTypeSymbol.OriginalDefinition);
if (!areEqual)
{
return;
}
var diagnostic = Diagnostic.Create(Rule, invocationExpressionSyntax.GetLocation(), methodSymbol.Name);
context.ReportDiagnostic(diagnostic);
}