private static void AnalyzeCodeRefactoringProvider(SymbolAnalysisContext context, INamedTypeSymbol symbol)
{
AttributeData attribute = symbol.GetAttribute(RoslynMetadataNames.Microsoft_CodeAnalysis_CodeRefactorings_ExportCodeRefactoringProviderAttribute);
if (attribute == null)
{
return;
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UnknownLanguageName))
{
AnalyzeLanguageName(context, attribute);
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.SpecifyExportCodeRefactoringProviderAttributeName) &&
!ContainsNamedArgument(attribute, "Name"))
{
ReportDiagnostic(context, attribute, DiagnosticDescriptors.SpecifyExportCodeRefactoringProviderAttributeName);
}
}
private static void AnalyzeDiagnosticAnalyzer(SymbolAnalysisContext context, INamedTypeSymbol symbol)
{
AttributeData attribute = symbol.GetAttribute(RoslynMetadataNames.Microsoft_CodeAnalysis_Diagnostics_DiagnosticAnalyzerAttribute);
if (attribute == null)
{
return;
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UnknownLanguageName))
{
AnalyzeLanguageName(context, attribute);
}
}
private static void AnalyzeFieldSymbol(SymbolAnalysisContext context)
{
var fieldSymbol = (IFieldSymbol)context.Symbol;
if (!fieldSymbol.IsConst &&
!fieldSymbol.IsImplicitlyDeclared &&
fieldSymbol.DeclaredAccessibility == Accessibility.Private &&
!string.IsNullOrEmpty(fieldSymbol.Name) &&
!IsValidIdentifier(fieldSymbol.Name))
{
if (!fieldSymbol.IsStatic ||
!fieldSymbol.IsReadOnly ||
context.IsAnalyzerSuppressed(AnalyzerOptions.DoNotRenamePrivateStaticReadOnlyFieldToCamelCaseWithUnderscore))
{
DiagnosticHelpers.ReportDiagnostic(context,
DiagnosticDescriptors.RenamePrivateFieldToCamelCaseWithUnderscore,
fieldSymbol.Locations[0]);
}
}
}
private static void AnalyzeNamedType(SymbolAnalysisContext context)
{
var typeSymbol = (INamedTypeSymbol)context.Symbol;
if (typeSymbol.IsImplicitlyDeclared)
{
return;
}
if (typeSymbol.TypeKind != TypeKind.Enum)
{
return;
}
bool hasFlagsAttribute = typeSymbol.HasAttribute(MetadataNames.System_FlagsAttribute);
ImmutableArray <ISymbol> members = default;
if (hasFlagsAttribute &&
!context.IsAnalyzerSuppressed(DiagnosticDescriptors.DeclareEnumMemberWithZeroValue))
{
members = typeSymbol.GetMembers();
if (!ContainsFieldWithZeroValue(members))
{
var enumDeclaration = (EnumDeclarationSyntax)typeSymbol.GetSyntax(context.CancellationToken);
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.DeclareEnumMemberWithZeroValue, enumDeclaration.Identifier);
}
}
EnumSymbolInfo enumInfo = default;
if (hasFlagsAttribute &&
!context.IsAnalyzerSuppressed(DiagnosticDescriptors.CompositeEnumValueContainsUndefinedFlag))
{
enumInfo = EnumSymbolInfo.Create(typeSymbol);
foreach (EnumFieldSymbolInfo field in enumInfo.Fields)
{
if (field.HasValue &&
ConvertHelpers.CanConvertFromUInt64(field.Value, typeSymbol.EnumUnderlyingType.SpecialType) &&
!IsMaxValue(field.Value, typeSymbol.EnumUnderlyingType.SpecialType) &&
field.HasCompositeValue())
{
foreach (ulong value in (field.DecomposeValue()))
{
if (!enumInfo.Contains(value))
{
ReportUndefinedFlag(context, field.Symbol, value.ToString());
}
}
}
}
}
if (hasFlagsAttribute &&
!context.IsAnalyzerSuppressed(DiagnosticDescriptors.DeclareEnumValueAsCombinationOfNames))
{
if (members.IsDefault)
{
members = typeSymbol.GetMembers();
}
foreach (ISymbol member in members)
{
if (!(member is IFieldSymbol fieldSymbol))
{
continue;
}
if (!fieldSymbol.HasConstantValue)
{
break;
}
EnumFieldSymbolInfo fieldInfo = EnumFieldSymbolInfo.Create(fieldSymbol);
if (!fieldInfo.HasCompositeValue())
{
continue;
}
var declaration = (EnumMemberDeclarationSyntax)fieldInfo.Symbol.GetSyntax(context.CancellationToken);
ExpressionSyntax expression = declaration.EqualsValue?.Value.WalkDownParentheses();
if (expression != null &&
(expression.IsKind(SyntaxKind.NumericLiteralExpression) ||
expression
.DescendantNodes()
.Any(f => f.IsKind(SyntaxKind.NumericLiteralExpression))))
{
if (enumInfo.IsDefault)
{
enumInfo = EnumSymbolInfo.Create(typeSymbol);
if (enumInfo.Fields.Any(f => !f.HasValue))
{
break;
}
}
List <EnumFieldSymbolInfo> values = enumInfo.Decompose(fieldInfo);
if (values?.Count > 1)
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.DeclareEnumValueAsCombinationOfNames, expression);
}
}
}
}
if (hasFlagsAttribute &&
!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseBitShiftOperator))
{
if (members.IsDefault)
{
members = typeSymbol.GetMembers();
}
foreach (ISymbol member in members)
{
if (!(member is IFieldSymbol fieldSymbol))
{
continue;
}
if (!fieldSymbol.HasConstantValue)
{
continue;
}
EnumFieldSymbolInfo fieldInfo = EnumFieldSymbolInfo.Create(fieldSymbol);
if (fieldInfo.Value <= 1)
{
continue;
}
if (fieldInfo.HasCompositeValue())
{
continue;
}
var declaration = (EnumMemberDeclarationSyntax)fieldInfo.Symbol.GetSyntax(context.CancellationToken);
ExpressionSyntax expression = declaration.EqualsValue?.Value.WalkDownParentheses();
if (expression.IsKind(SyntaxKind.NumericLiteralExpression))
{
var enumDeclaration = (EnumDeclarationSyntax)typeSymbol.GetSyntax(context.CancellationToken);
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.UseBitShiftOperator, enumDeclaration.Identifier);
break;
}
}
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.DuplicateEnumValue))
{
if (enumInfo.IsDefault)
{
enumInfo = EnumSymbolInfo.Create(typeSymbol);
}
ImmutableArray <EnumFieldSymbolInfo> fields = enumInfo.Fields;
if (fields.Length > 1)
{
EnumFieldSymbolInfo symbolInfo1 = fields[0];
EnumFieldSymbolInfo symbolInfo2 = default;
for (int i = 1; i < fields.Length; i++, symbolInfo1 = symbolInfo2)
{
symbolInfo2 = fields[i];
if (!symbolInfo1.HasValue ||
!symbolInfo2.HasValue ||
symbolInfo1.Value != symbolInfo2.Value)
{
continue;
}
var enumMember1 = (EnumMemberDeclarationSyntax)symbolInfo1.Symbol.GetSyntax(context.CancellationToken);
if (enumMember1 == null)
{
continue;
}
var enumMember2 = (EnumMemberDeclarationSyntax)symbolInfo2.Symbol.GetSyntax(context.CancellationToken);
if (enumMember2 == null)
{
continue;
}
ExpressionSyntax value1 = enumMember1.EqualsValue?.Value?.WalkDownParentheses();
ExpressionSyntax value2 = enumMember2.EqualsValue?.Value?.WalkDownParentheses();
if (value1 == null)
{
if (value2 != null)
{
ReportDuplicateValue(context, enumMember1, value2);
}
}
else if (value2 == null)
{
ReportDuplicateValue(context, enumMember2, value1);
}
else
{
SyntaxKind kind1 = value1.Kind();
SyntaxKind kind2 = value2.Kind();
if (kind1 == SyntaxKind.NumericLiteralExpression)
{
if (kind2 == SyntaxKind.NumericLiteralExpression)
{
var enumDeclaration = (EnumDeclarationSyntax)enumMember1.Parent;
SeparatedSyntaxList <EnumMemberDeclarationSyntax> enumMembers = enumDeclaration.Members;
if (enumMembers.IndexOf(enumMember1) < enumMembers.IndexOf(enumMember2))
{
ReportDuplicateValue(context, value2);
}
else
{
ReportDuplicateValue(context, value1);
}
}
else if (!string.Equals((value2 as IdentifierNameSyntax)?.Identifier.ValueText, enumMember1.Identifier.ValueText, StringComparison.Ordinal))
{
ReportDuplicateValue(context, value1);
}
}
else if (kind2 == SyntaxKind.NumericLiteralExpression &&
!string.Equals((value1 as IdentifierNameSyntax)?.Identifier.ValueText, enumMember2.Identifier.ValueText, StringComparison.Ordinal))
{
ReportDuplicateValue(context, value2);
}
}
}
}
}
}