private static void AnalyzeTypeDeclaration(SyntaxNodeAnalysisContext context)
{
var typeDeclaration = (TypeDeclarationSyntax)context.Node;
if (typeDeclaration.Modifiers.Contains(SyntaxKind.PartialKeyword))
return;
SemanticModel semanticModel = context.SemanticModel;
CancellationToken cancellationToken = context.CancellationToken;
INamedTypeSymbol declarationSymbol = null;
ImmutableArray<AttributeData> attributes = default;
if (typeDeclaration.IsKind(SyntaxKind.StructDeclaration))
{
declarationSymbol = semanticModel.GetDeclaredSymbol(typeDeclaration, cancellationToken);
attributes = declarationSymbol.GetAttributes();
if (attributes.Any(f => f.AttributeClass.HasMetadataName(MetadataNames.System_Runtime_InteropServices_StructLayoutAttribute)))
return;
}
bool? canContainUnityScriptMethods = null;
SyntaxList<MemberDeclarationSyntax> members = typeDeclaration.Members;
UnusedMemberWalker walker = null;
foreach (MemberDeclarationSyntax member in members)
{
if (member.ContainsDiagnostics)
continue;
if (member.ContainsUnbalancedIfElseDirectives(member.Span))
continue;
switch (member.Kind())
{
case SyntaxKind.DelegateDeclaration:
{
var declaration = (DelegateDeclarationSyntax)member;
if (SyntaxAccessibility<DelegateDeclarationSyntax>.Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
walker = UnusedMemberWalker.GetInstance();
walker.AddDelegate(declaration.Identifier.ValueText, declaration);
}
break;
}
case SyntaxKind.EventDeclaration:
{
var declaration = (EventDeclarationSyntax)member;
if (declaration.ExplicitInterfaceSpecifier == null
&& SyntaxAccessibility<EventDeclarationSyntax>.Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
walker = UnusedMemberWalker.GetInstance();
walker.AddNode(declaration.Identifier.ValueText, declaration);
}
break;
}
case SyntaxKind.EventFieldDeclaration:
{
var declaration = (EventFieldDeclarationSyntax)member;
if (SyntaxAccessibility<EventFieldDeclarationSyntax>.Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
walker = UnusedMemberWalker.GetInstance();
walker.AddNodes(declaration.Declaration);
}
break;
}
case SyntaxKind.FieldDeclaration:
{
var declaration = (FieldDeclarationSyntax)member;
SyntaxTokenList modifiers = declaration.Modifiers;
if (SyntaxAccessibility<FieldDeclarationSyntax>.Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
walker = UnusedMemberWalker.GetInstance();
walker.AddNodes(declaration.Declaration, isConst: modifiers.Contains(SyntaxKind.ConstKeyword));
}
break;
}
case SyntaxKind.MethodDeclaration:
{
var declaration = (MethodDeclarationSyntax)member;
SyntaxTokenList modifiers = declaration.Modifiers;
if (declaration.ExplicitInterfaceSpecifier != null
|| declaration.AttributeLists.Any()
|| SyntaxAccessibility<MethodDeclarationSyntax>.Instance.GetAccessibility(declaration) != Accessibility.Private)
{
break;
}
string methodName = declaration.Identifier.ValueText;
if (IsMainMethod(declaration, modifiers, methodName))
break;
if (declaration.ReturnsVoid()
&& AnalyzerOptions.SuppressUnityScriptMethods.IsEnabled(context))
{
if (canContainUnityScriptMethods == null)
{
if (declarationSymbol == null)
declarationSymbol = semanticModel.GetDeclaredSymbol(typeDeclaration, context.CancellationToken);
canContainUnityScriptMethods = declarationSymbol.InheritsFrom(UnityScriptMethods.MonoBehaviourClassName);
}
if (canContainUnityScriptMethods == true
&& UnityScriptMethods.MethodNames.Contains(methodName))
{
break;
}
}
if (walker == null)
walker = UnusedMemberWalker.GetInstance();
walker.AddNode(methodName, declaration);
break;
}
case SyntaxKind.PropertyDeclaration:
{
var declaration = (PropertyDeclarationSyntax)member;
if (declaration.ExplicitInterfaceSpecifier == null
&& SyntaxAccessibility<PropertyDeclarationSyntax>.Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
walker = UnusedMemberWalker.GetInstance();
walker.AddNode(declaration.Identifier.ValueText, declaration);
}
break;
}
}
}
if (walker == null)
return;
try
{
Collection<NodeSymbolInfo> nodes = walker.Nodes;
if (ShouldAnalyzeDebuggerDisplayAttribute()
&& nodes.Any(f => f.CanBeInDebuggerDisplayAttribute))
{
if (attributes.IsDefault)
attributes = semanticModel.GetDeclaredSymbol(typeDeclaration, cancellationToken).GetAttributes();
string value = attributes
.FirstOrDefault(f => f.AttributeClass.HasMetadataName(MetadataNames.System_Diagnostics_DebuggerDisplayAttribute))?
.ConstructorArguments
.SingleOrDefault(shouldThrow: false)
.Value?
.ToString();
if (value != null)
RemoveMethodsAndPropertiesThatAreInDebuggerDisplayAttributeValue(value, ref nodes);
}
if (nodes.Count > 0)
{
walker.SemanticModel = semanticModel;
walker.CancellationToken = cancellationToken;
walker.Visit(typeDeclaration);
foreach (NodeSymbolInfo node in nodes)
ReportDiagnostic(context, node.Node);
}
}
finally
{
UnusedMemberWalker.Free(walker);
}
bool ShouldAnalyzeDebuggerDisplayAttribute()
{
foreach (AttributeListSyntax attributeList in typeDeclaration.AttributeLists)
{
foreach (AttributeSyntax attribute in attributeList.Attributes)
{
if (attribute.ArgumentList?.Arguments.Count(f => f.NameEquals == null) == 1)
return true;
}
}
return false;
}
}
private static void AnalyzeTypeDeclaration(SyntaxNodeAnalysisContext context, TypeDeclarationSyntax typeDeclaration)
{
if (typeDeclaration.Modifiers.Contains(SyntaxKind.PartialKeyword))
{
return;
}
SyntaxList <MemberDeclarationSyntax> members = typeDeclaration.Members;
UnusedMemberWalker walker = null;
SemanticModel semanticModel = context.SemanticModel;
CancellationToken cancellationToken = context.CancellationToken;
foreach (MemberDeclarationSyntax member in members)
{
if (member.ContainsDiagnostics)
{
continue;
}
if (member.ContainsUnbalancedIfElseDirectives(member.Span))
{
continue;
}
switch (member.Kind())
{
case SyntaxKind.DelegateDeclaration:
{
var declaration = (DelegateDeclarationSyntax)member;
if (SyntaxAccessibility <DelegateDeclarationSyntax> .Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
{
walker = UnusedMemberWalkerCache.GetInstance();
}
walker.AddDelegate(declaration.Identifier.ValueText, declaration);
}
break;
}
case SyntaxKind.EventDeclaration:
{
var declaration = (EventDeclarationSyntax)member;
if (declaration.ExplicitInterfaceSpecifier == null &&
SyntaxAccessibility <EventDeclarationSyntax> .Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
{
walker = UnusedMemberWalkerCache.GetInstance();
}
walker.AddNode(declaration.Identifier.ValueText, declaration);
}
break;
}
case SyntaxKind.EventFieldDeclaration:
{
var declaration = (EventFieldDeclarationSyntax)member;
if (SyntaxAccessibility <EventFieldDeclarationSyntax> .Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
{
walker = UnusedMemberWalkerCache.GetInstance();
}
walker.AddNodes(declaration.Declaration);
}
break;
}
case SyntaxKind.FieldDeclaration:
{
var declaration = (FieldDeclarationSyntax)member;
SyntaxTokenList modifiers = declaration.Modifiers;
if (SyntaxAccessibility <FieldDeclarationSyntax> .Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
{
walker = UnusedMemberWalkerCache.GetInstance();
}
walker.AddNodes(declaration.Declaration, isConst: modifiers.Contains(SyntaxKind.ConstKeyword));
}
break;
}
case SyntaxKind.MethodDeclaration:
{
var declaration = (MethodDeclarationSyntax)member;
SyntaxTokenList modifiers = declaration.Modifiers;
if (declaration.ExplicitInterfaceSpecifier == null &&
!declaration.AttributeLists.Any() &&
SyntaxAccessibility <MethodDeclarationSyntax> .Instance.GetAccessibility(declaration) == Accessibility.Private)
{
string methodName = declaration.Identifier.ValueText;
if (!IsMainMethod(declaration, modifiers, methodName))
{
if (walker == null)
{
walker = UnusedMemberWalkerCache.GetInstance();
}
walker.AddNode(methodName, declaration);
}
}
break;
}
case SyntaxKind.PropertyDeclaration:
{
var declaration = (PropertyDeclarationSyntax)member;
if (declaration.ExplicitInterfaceSpecifier == null &&
SyntaxAccessibility <PropertyDeclarationSyntax> .Instance.GetAccessibility(declaration) == Accessibility.Private)
{
if (walker == null)
{
walker = UnusedMemberWalkerCache.GetInstance();
}
walker.AddNode(declaration.Identifier.ValueText, declaration);
}
break;
}
}
}
if (walker == null)
{
return;
}
Collection <NodeSymbolInfo> nodes = walker.Nodes;
if (ShouldAnalyzeDebuggerDisplayAttribute() &&
nodes.Any(f => f.CanBeInDebuggerDisplayAttribute))
{
string value = semanticModel
.GetDeclaredSymbol(typeDeclaration, cancellationToken)
.GetAttribute(MetadataNames.System_Diagnostics_DebuggerDisplayAttribute)?
.ConstructorArguments
.SingleOrDefault(shouldThrow: false)
.Value?
.ToString();
if (value != null)
{
RemoveMethodsAndPropertiesThatAreInDebuggerDisplayAttributeValue(value, ref nodes);
}
if (nodes.Count == 0)
{
UnusedMemberWalkerCache.Free(walker);
return;
}
}
walker.SemanticModel = semanticModel;
walker.CancellationToken = cancellationToken;
walker.Visit(typeDeclaration);
foreach (NodeSymbolInfo info in nodes)
{
SyntaxNode node = info.Node;
if (node is VariableDeclaratorSyntax variableDeclarator)
{
var variableDeclaration = (VariableDeclarationSyntax)variableDeclarator.Parent;
if (variableDeclaration.Variables.Count == 1)
{
ReportDiagnostic(context, variableDeclaration.Parent, CSharpFacts.GetTitle(variableDeclaration.Parent));
}
else
{
ReportDiagnostic(context, variableDeclarator, CSharpFacts.GetTitle(variableDeclaration.Parent));
}
}
else
{
ReportDiagnostic(context, node, CSharpFacts.GetTitle(node));
}
}
UnusedMemberWalkerCache.Free(walker);
bool ShouldAnalyzeDebuggerDisplayAttribute()
{
foreach (AttributeListSyntax attributeList in typeDeclaration.AttributeLists)
{
foreach (AttributeSyntax attribute in attributeList.Attributes)
{
if (attribute.ArgumentList?.Arguments.Count(f => f.NameEquals == null) == 1)
{
return(true);
}
}
}
return(false);
}
}