public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ParameterSyntax parameter))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.OverridingMemberCannotChangeParamsModifier:
{
if (parameter.IsParams())
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
else
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsAnyEnabled(
CodeFixIdentifiers.AddOverrideModifier,
CodeFixIdentifiers.AddNewModifier,
CodeFixIdentifiers.RemoveMemberDeclaration))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.MemberHidesInheritedMemberUseNewKeywordIfHidingWasIntended:
{
if (Settings.IsEnabled(CodeFixIdentifiers.AddNewModifier))
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, memberDeclaration, SyntaxKind.NewKeyword, additionalKey: nameof(SyntaxKind.NewKeyword));
}
if (Settings.IsEnabled(CodeFixIdentifiers.RemoveMemberDeclaration))
{
CodeFixRegistrator.RemoveMemberDeclaration(context, diagnostic, memberDeclaration);
}
break;
}
case CompilerDiagnosticIdentifiers.MemberHidesInheritedMemberToMakeCurrentMethodOverrideThatImplementationAddOverrideKeyword:
{
if (Settings.IsEnabled(CodeFixIdentifiers.AddOverrideModifier) &&
!SyntaxInfo.ModifierListInfo(memberDeclaration).IsStatic)
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, memberDeclaration, SyntaxKind.OverrideKeyword, additionalKey: nameof(SyntaxKind.OverrideKeyword));
}
if (Settings.IsEnabled(CodeFixIdentifiers.AddNewModifier))
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, memberDeclaration, SyntaxKind.NewKeyword, additionalKey: nameof(SyntaxKind.NewKeyword));
}
if (Settings.IsEnabled(CodeFixIdentifiers.RemoveMemberDeclaration))
{
CodeFixRegistrator.RemoveMemberDeclaration(context, diagnostic, memberDeclaration);
}
break;
}
}
}
}
private static void AddStaticModifier(CodeFixContext context, Diagnostic diagnostic, SyntaxNode node, string additionalKey = null)
{
if (node.IsKind(SyntaxKind.ConstructorDeclaration) &&
((ConstructorDeclarationSyntax)node).ParameterList?.Parameters.Any() == true)
{
return;
}
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: additionalKey);
}
private void AddStaticModifier(
CodeFixContext context,
Diagnostic diagnostic,
SyntaxNode node,
SemanticModel semanticModel)
{
ISymbol symbol = semanticModel.GetSymbol(node, context.CancellationToken);
if (symbol == null)
{
return;
}
SyntaxNode syntax = symbol.GetSyntaxOrDefault(context.CancellationToken);
if (syntax == null)
{
return;
}
if (syntax.Kind() == SyntaxKind.VariableDeclarator)
{
syntax = syntax.Parent?.Parent;
}
Debug.Assert(syntax.IsKind(SyntaxKind.EventDeclaration, SyntaxKind.EventFieldDeclaration, SyntaxKind.FieldDeclaration, SyntaxKind.MethodDeclaration, SyntaxKind.PropertyDeclaration), syntax.ToString());
if (!(syntax is MemberDeclarationSyntax memberDeclaration))
{
return;
}
if (memberDeclaration.GetModifiers().Contains(SyntaxKind.StaticKeyword))
{
return;
}
Document document = context.Document;
SyntaxTree tree = memberDeclaration.SyntaxTree;
if (tree != node.SyntaxTree)
{
document = context.Solution().GetDocument(tree);
}
ModifiersCodeFixRegistrator.AddModifier(
context,
document,
diagnostic,
memberDeclaration,
SyntaxKind.StaticKeyword,
title: $"Make '{symbol.Name}' static",
additionalKey: CodeFixIdentifiers.AddStaticModifier);
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ParameterSyntax parameter))
{
return;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
context.Diagnostics[0],
parameter,
SyntaxKind.InKeyword);
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ParameterSyntax parameter))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.OverridingMemberShouldNotChangeParamsModifier:
{
if (parameter.IsParams())
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
else
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
break;
}
case DiagnosticIdentifiers.MakeParameterRefReadOnly:
case DiagnosticIdentifiers.DoNotPassNonReadOnlyStructByReadOnlyReference:
{
if (parameter.Modifiers.Contains(SyntaxKind.InKeyword))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, parameter, SyntaxKind.InKeyword);
}
else
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, parameter, SyntaxKind.InKeyword);
}
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ParameterSyntax parameter))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.AddParameterToDocumentationComment:
{
var refactoring = new AddParameterToDocumentationCommentRefactoring();
CodeAction codeAction = CodeAction.Create(
"Add parameter to documentation comment",
cancellationToken => refactoring.RefactorAsync(context.Document, parameter, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.OverridingMemberCannotChangeParamsModifier:
{
if (parameter.IsParams())
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
else
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddDocumentationComment) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMethodReturnType) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MemberTypeMustMatchOverriddenMemberType) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddPartialModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassAbstract) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveParametersFromStaticConstructor) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveMemberDeclaration) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RenameDestructorToMatchClassName) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RenameTupleElement))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.MissingXmlCommentForPubliclyVisibleTypeOrMember:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddDocumentationComment))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Add documentation comment",
cancellationToken => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, false, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
CodeAction codeAction2 = CodeAction.Create(
"Add documentation comment (copy from base if available)",
cancellationToken => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, true, cancellationToken),
GetEquivalenceKey(diagnostic, "CopyFromBaseIfAvailable"));
context.RegisterCodeFix(codeAction2, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.MethodReturnTypeMustMatchOverriddenMethodReturnType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMethodReturnType))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var methodSymbol = (IMethodSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
ITypeSymbol typeSymbol = methodSymbol.OverriddenMethod.ReturnType;
CodeFixRegistrator.ChangeMemberDeclarationType(context, diagnostic, memberDeclaration, typeSymbol, semanticModel);
break;
}
case CompilerDiagnosticIdentifiers.PartialMethodsMustHaveVoidReturnType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMethodReturnType))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var methodDeclaration = (MethodDeclarationSyntax)memberDeclaration;
MethodDeclarationSyntax otherPart = semanticModel.GetOtherPart(methodDeclaration, context.CancellationToken);
if (otherPart == null)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Change return type to 'void'",
cancellationToken =>
{
return(context.Document.Solution().ReplaceNodesAsync(
new MethodDeclarationSyntax[] { methodDeclaration, otherPart },
(node, _) => node.WithReturnType(CSharpFactory.VoidType().WithTriviaFrom(node.ReturnType)),
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.MemberTypeMustMatchOverriddenMemberType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MemberTypeMustMatchOverriddenMemberType))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.IndexerDeclaration:
{
var propertySymbol = (IPropertySymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = propertySymbol.OverriddenProperty.Type;
break;
}
case SyntaxKind.EventDeclaration:
{
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
case SyntaxKind.EventFieldDeclaration:
{
VariableDeclaratorSyntax declarator = ((EventFieldDeclarationSyntax)memberDeclaration).Declaration.Variables.First();
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(declarator, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
}
CodeFixRegistrator.ChangeMemberDeclarationType(context, diagnostic, memberDeclaration, typeSymbol, semanticModel);
break;
}
case CompilerDiagnosticIdentifiers.MissingPartialModifier:
case CompilerDiagnosticIdentifiers.PartialMethodMustBeDeclaredInPartialClassOrPartialStruct:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddPartialModifier))
{
break;
}
SyntaxNode node = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.MethodDeclaration:
{
if (memberDeclaration.IsParentKind(SyntaxKind.ClassDeclaration, SyntaxKind.StructDeclaration))
{
node = memberDeclaration.Parent;
}
break;
}
case SyntaxKind.ClassDeclaration:
case SyntaxKind.StructDeclaration:
case SyntaxKind.InterfaceDeclaration:
{
node = memberDeclaration;
break;
}
}
Debug.Assert(node != null, memberDeclaration.ToString());
if (node == null)
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
break;
}
case CompilerDiagnosticIdentifiers.MemberIsAbstractButItIsContainedInNonAbstractClass:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassAbstract))
{
break;
}
if (!memberDeclaration.IsParentKind(SyntaxKind.ClassDeclaration))
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
memberDeclaration.Parent,
SyntaxKind.AbstractKeyword,
title: "Make containing class abstract");
break;
}
case CompilerDiagnosticIdentifiers.StaticConstructorMustBeParameterless:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveParametersFromStaticConstructor))
{
break;
}
var constructorDeclaration = (ConstructorDeclarationSyntax)memberDeclaration;
CodeAction codeAction = CodeAction.Create(
"Remove parameters",
cancellationToken =>
{
ParameterListSyntax parameterList = constructorDeclaration.ParameterList;
ParameterListSyntax newParameterList = parameterList
.WithParameters(default(SeparatedSyntaxList <ParameterSyntax>))
.WithOpenParenToken(parameterList.OpenParenToken.WithoutTrailingTrivia())
.WithCloseParenToken(parameterList.CloseParenToken.WithoutLeadingTrivia());
ConstructorDeclarationSyntax newNode = constructorDeclaration.WithParameterList(newParameterList);
return(context.Document.ReplaceNodeAsync(constructorDeclaration, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.ExplicitInterfaceDeclarationCanOnlyBeDeclaredInClassOrStruct:
case CompilerDiagnosticIdentifiers.InterfacesCannotContainFields:
case CompilerDiagnosticIdentifiers.InterfacesCannotContainOperators:
case CompilerDiagnosticIdentifiers.InterfacesCannotDeclareTypes:
case CompilerDiagnosticIdentifiers.OnlyClassTypesCanContainDestructors:
case CompilerDiagnosticIdentifiers.StructsCannotContainExplicitParameterlessConstructors:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveMemberDeclaration))
{
break;
}
CodeFixRegistrator.RemoveMember(context, diagnostic, memberDeclaration);
break;
}
case CompilerDiagnosticIdentifiers.NameOfDestructorMustMatchNameOfClass:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RenameDestructorToMatchClassName))
{
break;
}
if (!(memberDeclaration is DestructorDeclarationSyntax destructorDeclaration))
{
break;
}
if (!(memberDeclaration.Parent is ClassDeclarationSyntax classDeclaration))
{
break;
}
if (classDeclaration.Identifier.ValueText.Length == 0)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Rename destructor to match class name",
cancellationToken =>
{
DestructorDeclarationSyntax newNode = destructorDeclaration.WithIdentifier(classDeclaration.Identifier.WithTriviaFrom(destructorDeclaration.Identifier));
return(context.Document.ReplaceNodeAsync(destructorDeclaration, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CannotChangeTupleElementNameWhenOverridingInheritedMember:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RenameTupleElement))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (memberDeclaration is MethodDeclarationSyntax methodDeclaration)
{
IMethodSymbol methodSymbol = semanticModel.GetDeclaredSymbol(methodDeclaration, context.CancellationToken);
if (!(methodSymbol.ReturnType is INamedTypeSymbol tupleType))
{
break;
}
if (!tupleType.IsTupleType)
{
break;
}
if (!(methodSymbol.OverriddenMethod?.ReturnType is INamedTypeSymbol baseTupleType))
{
break;
}
if (!baseTupleType.IsTupleType)
{
break;
}
ImmutableArray <IFieldSymbol> elements = tupleType.TupleElements;
ImmutableArray <IFieldSymbol> baseElements = baseTupleType.TupleElements;
if (elements.Length != baseElements.Length)
{
break;
}
int i = 0;
while (i < elements.Length)
{
if (elements[i].Name != baseElements[i].Name)
{
break;
}
i++;
}
if (i == elements.Length)
{
break;
}
TupleElementSyntax tupleElement = ((TupleTypeSyntax)methodDeclaration.ReturnType).Elements[i];
CodeAction codeAction = CodeAction.Create(
$"Rename '{elements[i].Name}' to '{baseElements[i].Name}'",
ct => RenameTupleElementAsync(context.Document, methodDeclaration, tupleElement, elements[i], baseElements[i].Name, semanticModel, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
else if (memberDeclaration is PropertyDeclarationSyntax propertyDeclaration)
{
IPropertySymbol propertySymbol = semanticModel.GetDeclaredSymbol(propertyDeclaration, context.CancellationToken);
if (!(propertySymbol.Type is INamedTypeSymbol tupleType))
{
break;
}
if (!tupleType.IsTupleType)
{
break;
}
if (!(propertySymbol.OverriddenProperty?.Type is INamedTypeSymbol baseTupleType))
{
break;
}
if (!baseTupleType.IsTupleType)
{
break;
}
ImmutableArray <IFieldSymbol> elements = tupleType.TupleElements;
ImmutableArray <IFieldSymbol> baseElements = baseTupleType.TupleElements;
if (elements.Length != baseElements.Length)
{
break;
}
int i = 0;
while (i < elements.Length)
{
if (elements[i].Name != baseElements[i].Name)
{
break;
}
i++;
}
if (i == elements.Length)
{
break;
}
TupleElementSyntax tupleElement = ((TupleTypeSyntax)propertyDeclaration.Type).Elements[i];
CodeAction codeAction = CodeAction.Create(
$"Rename '{elements[i].Name}' to '{baseElements[i].Name}'",
ct => RenameTupleElementAsync(context.Document, propertyDeclaration, tupleElement, elements[i], baseElements[i].Name, semanticModel, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ClassDeclarationSyntax classDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.MakeClassStatic:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ISymbol symbol = semanticModel.GetDeclaredSymbol(classDeclaration, context.CancellationToken);
ImmutableArray <SyntaxReference> syntaxReferences = symbol.DeclaringSyntaxReferences;
if (!syntaxReferences.Any())
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
ImmutableArray.CreateRange(syntaxReferences, f => f.GetSyntax()),
SyntaxKind.StaticKeyword,
title: "Make class static");
break;
}
case DiagnosticIdentifiers.AddStaticModifierToAllPartialClassDeclarations:
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, classDeclaration, SyntaxKind.StaticKeyword);
break;
}
case DiagnosticIdentifiers.ImplementExceptionConstructors:
{
CodeAction codeAction = CodeAction.Create(
"Generate exception constructors",
cancellationToken =>
{
return(ImplementExceptionConstructorsRefactoring.RefactorAsync(
context.Document,
classDeclaration,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseAttributeUsageAttribute:
{
CodeAction codeAction = CodeAction.Create(
"Use AttributeUsageAttribute",
cancellationToken =>
{
return(UseAttributeUsageAttributeRefactoring.RefactorAsync(
context.Document,
classDeclaration,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.FormatDeclarationBraces:
{
CodeAction codeAction = CodeAction.Create(
"Format braces",
cancellationToken => FormatDeclarationBracesRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.RemoveRedundantOverridingMember:
{
CodeAction codeAction = CodeAction.Create(
$"Remove {memberDeclaration.GetTitle()}",
cancellationToken => context.Document.RemoveMemberAsync(memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddDefaultAccessModifier:
{
var accessibility = (Accessibility)Enum.Parse(
typeof(Accessibility),
context.Diagnostics[0].Properties[nameof(Accessibility)]);
CodeAction codeAction = CodeAction.Create(
"Add default access modifier",
cancellationToken => AddDefaultAccessModifierRefactoring.RefactorAsync(context.Document, memberDeclaration, accessibility, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddEmptyLineBetweenDeclarations:
{
CodeAction codeAction = CodeAction.Create(
"Add empty line",
cancellationToken => AddEmptyLineBetweenDeclarationsRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.RemoveRedundantSealedModifier:
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, memberDeclaration, SyntaxKind.SealedKeyword);
break;
}
case DiagnosticIdentifiers.AvoidSemicolonAtEndOfDeclaration:
{
CodeAction codeAction = CodeAction.Create(
"Remove unnecessary semicolon",
cancellationToken => AvoidSemicolonAtEndOfDeclarationRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReorderModifiers:
{
CodeAction codeAction = CodeAction.Create(
"Reorder modifiers",
cancellationToken => ReorderModifiersRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MarkFieldAsReadOnly:
{
var fieldDeclaration = (FieldDeclarationSyntax)memberDeclaration;
SeparatedSyntaxList <VariableDeclaratorSyntax> declarators = fieldDeclaration.Declaration.Variables;
string title = (declarators.Count == 1)
? $"Mark '{declarators[0].Identifier.ValueText}' as read-only"
: "Mark fields as read-only";
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, fieldDeclaration, SyntaxKind.ReadOnlyKeyword, title: title);
break;
}
case DiagnosticIdentifiers.UseConstantInsteadOfField:
{
CodeAction codeAction = CodeAction.Create(
"Use constant instead of field",
cancellationToken => UseConstantInsteadOfFieldRefactoring.RefactorAsync(context.Document, (FieldDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseReadOnlyAutoProperty:
{
CodeAction codeAction = CodeAction.Create(
"Use read-only auto-property",
cancellationToken => UseReadOnlyAutoPropertyRefactoring.RefactorAsync(context.Document, (PropertyDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReplaceCommentWithDocumentationComment:
{
CodeAction codeAction = CodeAction.Create(
ReplaceCommentWithDocumentationCommentRefactoring.Title,
cancellationToken => ReplaceCommentWithDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddStaticModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveThisModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassNonStatic) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddPartialModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveOutModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveRefModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddModifierAbstract))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindToken(root, context.Span.Start, out SyntaxToken token))
{
return;
}
SyntaxNode node = token.Parent;
if (!node.Kind().SupportsModifiers())
{
node = node.FirstAncestor(f => f.Kind().SupportsModifiers());
}
Debug.Assert(node != null, $"{nameof(node)} is null");
if (node == null)
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.ModifierIsNotValidForThisItem:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
SyntaxTokenList modifiers = node.GetModifiers();
if (modifiers.Contains(token))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, token);
break;
}
else if (IsInterfaceMemberOrExplicitInterfaceImplementation(node))
{
ModifiersCodeFixRegistrator.RemoveModifiers(context, diagnostic, node, modifiers, f =>
{
switch (f.Kind())
{
case SyntaxKind.PublicKeyword:
case SyntaxKind.ProtectedKeyword:
case SyntaxKind.InternalKeyword:
case SyntaxKind.PrivateKeyword:
case SyntaxKind.StaticKeyword:
case SyntaxKind.VirtualKeyword:
case SyntaxKind.OverrideKeyword:
case SyntaxKind.AbstractKeyword:
{
return(true);
}
}
return(false);
});
}
else if (node.IsKind(SyntaxKind.IndexerDeclaration))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword);
}
else if (node.IsKind(SyntaxKind.PropertyDeclaration))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.AsyncKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.MoreThanOneProtectionModifier:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, token);
}
break;
}
case CompilerDiagnosticIdentifiers.AccessibilityModifiersMayNotBeUsedOnAccessorsInInterface:
case CompilerDiagnosticIdentifiers.AccessModifiersAreNotAllowedOnStaticConstructors:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveAccessModifiers(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.ModifiersCannotBePlacedOnEventAccessorDeclarations:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveModifiers(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.OnlyMethodsClassesStructsOrInterfacesMayBePartial:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.ClassCannotBeBothStaticAndSealed:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: nameof(SyntaxKind.StaticKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.SealedKeyword, additionalKey: nameof(SyntaxKind.SealedKeyword));
break;
}
case CompilerDiagnosticIdentifiers.FieldCanNotBeBothVolatileAndReadOnly:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
var fieldDeclaration = (FieldDeclarationSyntax)node;
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, fieldDeclaration, SyntaxKind.VolatileKeyword, additionalKey: nameof(SyntaxKind.VolatileKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, fieldDeclaration, SyntaxKind.ReadOnlyKeyword, additionalKey: nameof(SyntaxKind.ReadOnlyKeyword));
break;
}
case CompilerDiagnosticIdentifiers.NewProtectedMemberDeclaredInSealedClass:
case CompilerDiagnosticIdentifiers.StaticClassesCannotContainProtectedMembers:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrPrivate);
}
break;
}
case CompilerDiagnosticIdentifiers.VirtualOrAbstractmembersCannotBePrivate:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrProtected);
}
break;
}
case CompilerDiagnosticIdentifiers.AbstractPropertiesCannotHavePrivateAccessors:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveAccessModifiers(context, diagnostic, node, additionalKey: CodeFixIdentifiers.RemoveInvalidModifier);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrProtected);
}
break;
}
case CompilerDiagnosticIdentifiers.StaticMemberCannotBeMarkedOverrideVirtualOrAbstract:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
if (!node.IsParentKind(SyntaxKind.ClassDeclaration) ||
!((ClassDeclarationSyntax)node.Parent).Modifiers.Contains(SyntaxKind.StaticKeyword))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: nameof(SyntaxKind.StaticKeyword));
}
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.OverrideKeyword, additionalKey: nameof(SyntaxKind.OverrideKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.VirtualKeyword, additionalKey: nameof(SyntaxKind.VirtualKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.AbstractKeyword, additionalKey: nameof(SyntaxKind.AbstractKeyword));
break;
}
case CompilerDiagnosticIdentifiers.AsyncModifierCanOnlyBeUsedInMethodsThatHaveBody:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.AsyncKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.PartialMethodCannotHaveAccessModifiersOrVirtualAbstractOverrideNewSealedOrExternModifiers:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
ModifiersCodeFixRegistrator.RemoveModifiers(context, diagnostic, node, f =>
{
switch (f.Kind())
{
case SyntaxKind.PublicKeyword:
case SyntaxKind.ProtectedKeyword:
case SyntaxKind.InternalKeyword:
case SyntaxKind.PrivateKeyword:
case SyntaxKind.VirtualKeyword:
case SyntaxKind.AbstractKeyword:
case SyntaxKind.OverrideKeyword:
case SyntaxKind.NewKeyword:
case SyntaxKind.SealedKeyword:
case SyntaxKind.ExternKeyword:
{
return(true);
}
}
return(false);
});
break;
}
case CompilerDiagnosticIdentifiers.ExtensionMethodMustBeStatic:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddStaticModifier))
{
AddStaticModifier(context, diagnostic, node, CodeFixIdentifiers.AddStaticModifier);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveThisModifier))
{
var methodDeclaration = (MethodDeclarationSyntax)node;
ParameterSyntax parameter = methodDeclaration.ParameterList.Parameters.First();
SyntaxToken modifier = parameter.Modifiers.Find(SyntaxKind.ThisKeyword);
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, parameter, modifier, additionalKey: CodeFixIdentifiers.RemoveThisModifier);
}
break;
}
case CompilerDiagnosticIdentifiers.ExtensionMethodMustBeDefinedInNonGenericStaticClass:
{
if (!node.IsKind(SyntaxKind.ClassDeclaration))
{
return;
}
var classDeclaration = (ClassDeclarationSyntax)node;
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddStaticModifier) &&
!classDeclaration.IsStatic())
{
AddStaticModifier(context, diagnostic, node, CodeFixIdentifiers.AddStaticModifier);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveThisModifier))
{
IEnumerable <ParameterSyntax> thisParameters = classDeclaration.Members
.Where(f => f.IsKind(SyntaxKind.MethodDeclaration))
.Cast <MethodDeclarationSyntax>()
.Select(f => f.ParameterList?.Parameters.FirstOrDefault())
.Where(f => f?.Modifiers.Contains(SyntaxKind.ThisKeyword) == true);
ModifiersCodeFixRegistrator.RemoveModifier(
context,
diagnostic,
thisParameters,
SyntaxKind.ThisKeyword,
title: "Remove 'this' modifier from extension methods",
additionalKey: CodeFixIdentifiers.RemoveThisModifier);
}
break;
}
case CompilerDiagnosticIdentifiers.NoDefiningDeclarationFoundForImplementingDeclarationOfPartialMethod:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.MethodHasParameterModifierThisWhichIsNotOnFirstParameter:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveThisModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, token.Parent, token);
}
break;
}
case CompilerDiagnosticIdentifiers.CannotDeclareInstanceMembersInStaticClass:
case CompilerDiagnosticIdentifiers.StaticClassesCannotHaveInstanceConstructors:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddStaticModifier))
{
AddStaticModifier(context, diagnostic, node, CodeFixIdentifiers.AddStaticModifier);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassNonStatic))
{
var classDeclaration = (ClassDeclarationSyntax)node.Parent;
ModifiersCodeFixRegistrator.RemoveModifier(
context,
diagnostic,
classDeclaration,
classDeclaration.Modifiers.Find(SyntaxKind.StaticKeyword),
title: "Make containing class non-static",
additionalKey: CodeFixIdentifiers.MakeContainingClassNonStatic);
}
break;
}
case CompilerDiagnosticIdentifiers.ElementsDefinedInNamespaceCannotBeExplicitlyDeclaredAsPrivateProtectedOrProtectedInternal:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternal);
}
break;
}
case CompilerDiagnosticIdentifiers.NamespaceAlreadyContainsDefinition:
case CompilerDiagnosticIdentifiers.TypeAlreadyContainsDefinition:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddPartialModifier))
{
break;
}
if (!node.IsKind(
SyntaxKind.ClassDeclaration,
SyntaxKind.StructDeclaration,
SyntaxKind.InterfaceDeclaration,
SyntaxKind.MethodDeclaration))
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ISymbol symbol = semanticModel.GetDeclaredSymbol(node, context.CancellationToken);
ImmutableArray <SyntaxReference> syntaxReferences = symbol.DeclaringSyntaxReferences;
if (syntaxReferences.Length <= 1)
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
ImmutableArray.CreateRange(syntaxReferences, f => f.GetSyntax(context.CancellationToken)),
SyntaxKind.PartialKeyword);
break;
}
case CompilerDiagnosticIdentifiers.NoSuitableMethodFoundToOverride:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.OverrideKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.AsyncMethodsCannotHaveRefOrOutParameters:
case CompilerDiagnosticIdentifiers.IteratorsCannotHaveRefOrOutParameters:
case CompilerDiagnosticIdentifiers.ReadOnlyFieldCannotBePassedAsRefOrOutValue:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveRefModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.RefKeyword, additionalKey: nameof(SyntaxKind.RefKeyword));
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveOutModifier))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.OutKeyword, additionalKey: nameof(SyntaxKind.OutKeyword));
}
break;
}
case CompilerDiagnosticIdentifiers.CannotHaveInstancePropertyOrFieldInitializersInStruct:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddStaticModifier))
{
AddStaticModifier(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.MemberMustDeclareBodyBecauseItIsNotMarkedAbstractExternOrPartial:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddModifierAbstract) &&
node.Kind() == SyntaxKind.MethodDeclaration &&
(node.Parent as ClassDeclarationSyntax)?.Modifiers.Contains(SyntaxKind.AbstractKeyword) == true)
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.AbstractKeyword);
}
break;
}
}
}
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindToken(root, context.Span.Start, out SyntaxToken token))
{
return;
}
SyntaxKind kind = token.Kind();
Diagnostic diagnostic = context.Diagnostics[0];
Document document = context.Document;
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.CS0023_OperatorCannotBeAppliedToOperand:
{
if (kind == SyntaxKind.QuestionToken &&
token.Parent is ConditionalAccessExpressionSyntax conditionalAccess)
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(conditionalAccess.Expression, context.CancellationToken);
if (typeSymbol?.IsErrorType() == false &&
!typeSymbol.IsNullableType())
{
if (typeSymbol.IsValueType)
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveConditionalAccess, document, root.SyntaxTree))
{
CodeAction codeAction = CodeAction.Create(
"Remove '?' operator",
ct => document.WithTextChangeAsync(token.Span, "", ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
else if (typeSymbol.IsReferenceType)
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddArgumentList, document, root.SyntaxTree) &&
conditionalAccess.WhenNotNull is MemberBindingExpressionSyntax memberBindingExpression)
{
ConditionalAccessExpressionSyntax newNode = conditionalAccess.WithWhenNotNull(
InvocationExpression(
memberBindingExpression.WithoutTrailingTrivia(),
ArgumentList().WithTrailingTrivia(memberBindingExpression.GetTrailingTrivia())));
CodeAction codeAction = CodeAction.Create(
"Add argument list",
ct => document.ReplaceNodeAsync(conditionalAccess, newNode, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
}
}
break;
}
case CompilerDiagnosticIdentifiers.CS0267_PartialModifierCanOnlyAppearImmediatelyBeforeClassStructInterfaceOrVoid:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.OrderModifiers, document, root.SyntaxTree))
{
break;
}
ModifiersCodeFixRegistrator.MoveModifier(context, diagnostic, token.Parent, token);
break;
}
case CompilerDiagnosticIdentifiers.CS1750_ValueCannotBeUsedAsDefaultParameter:
{
if (token.Parent is not ParameterSyntax parameter)
{
break;
}
ExpressionSyntax value = parameter.Default?.Value;
if (value == null)
{
break;
}
if (value.IsKind(SyntaxKind.NullLiteralExpression))
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.ReplaceNullLiteralExpressionWithDefaultValue, document, root.SyntaxTree))
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
CodeFixRegistrator.ReplaceNullWithDefaultValue(context, diagnostic, value, semanticModel);
}
}
else if (!value.IsKind(SyntaxKind.DefaultExpression, SyntaxKind.DefaultLiteralExpression))
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeParameterType, document, root.SyntaxTree))
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(value, context.CancellationToken);
if (!typeSymbol.IsKind(SymbolKind.ErrorType))
{
CodeFixRegistrator.ChangeType(context, diagnostic, parameter.Type, typeSymbol, semanticModel);
}
}
}
break;
}
case CompilerDiagnosticIdentifiers.CS0126_ObjectOfTypeConvertibleToTypeIsRequired:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.ReturnDefaultValue, document, root.SyntaxTree))
{
break;
}
if (!token.IsKind(SyntaxKind.ReturnKeyword))
{
break;
}
if (!token.IsParentKind(SyntaxKind.ReturnStatement))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ISymbol symbol = semanticModel.GetEnclosingSymbol(token.SpanStart, context.CancellationToken);
if (symbol == null)
{
break;
}
SymbolKind symbolKind = symbol.Kind;
ITypeSymbol typeSymbol = null;
if (symbolKind == SymbolKind.Method)
{
var methodSymbol = (IMethodSymbol)symbol;
typeSymbol = methodSymbol.ReturnType;
if (methodSymbol.IsAsync &&
(typeSymbol is INamedTypeSymbol namedTypeSymbol))
{
ImmutableArray <ITypeSymbol> typeArguments = namedTypeSymbol.TypeArguments;
if (typeArguments.Any())
{
typeSymbol = typeArguments[0];
}
}
}
else if (symbolKind == SymbolKind.Property)
{
typeSymbol = ((IPropertySymbol)symbol).Type;
}
else
{
Debug.Fail(symbolKind.ToString());
}
if (typeSymbol == null)
{
break;
}
if (typeSymbol.Kind == SymbolKind.ErrorType)
{
break;
}
if (!typeSymbol.SupportsExplicitDeclaration())
{
break;
}
var returnStatement = (ReturnStatementSyntax)token.Parent;
CodeAction codeAction = CodeAction.Create(
"Return default value",
ct =>
{
ExpressionSyntax expression = typeSymbol.GetDefaultValueSyntax(document.GetDefaultSyntaxOptions());
if (expression.IsKind(SyntaxKind.DefaultExpression) &&
document.SupportsLanguageFeature(CSharpLanguageFeature.DefaultLiteral))
{
expression = CSharpFactory.DefaultLiteralExpression().WithTriviaFrom(expression);
}
ReturnStatementSyntax newNode = returnStatement.WithExpression(expression);
return(document.ReplaceNodeAsync(returnStatement, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS1031_TypeExpected:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddMissingType, document, root.SyntaxTree))
{
break;
}
if (!token.IsKind(SyntaxKind.CloseParenToken))
{
break;
}
if (token.Parent is not DefaultExpressionSyntax defaultExpression)
{
break;
}
if (defaultExpression.Type is not IdentifierNameSyntax identifierName)
{
break;
}
if (!identifierName.IsMissing)
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
TypeInfo typeInfo = semanticModel.GetTypeInfo(defaultExpression, context.CancellationToken);
ITypeSymbol convertedType = typeInfo.ConvertedType;
if (convertedType?.SupportsExplicitDeclaration() != true)
{
break;
}
CodeAction codeAction = CodeAction.Create(
$"Add type '{SymbolDisplay.ToMinimalDisplayString(convertedType, semanticModel, defaultExpression.SpanStart, SymbolDisplayFormats.DisplayName)}'",
ct =>
{
TypeSyntax newType = convertedType.ToTypeSyntax()
.WithTriviaFrom(identifierName)
.WithFormatterAndSimplifierAnnotation();
return(document.ReplaceNodeAsync(identifierName, newType, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS1597_SemicolonAfterMethodOrAccessorBlockIsNotValid:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveSemicolon, document, root.SyntaxTree))
{
break;
}
if (!token.IsKind(SyntaxKind.SemicolonToken))
{
break;
}
switch (token.Parent)
{
case MethodDeclarationSyntax methodDeclaration:
{
BlockSyntax body = methodDeclaration.Body;
if (body == null)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Remove semicolon",
ct =>
{
SyntaxTriviaList trivia = body
.GetTrailingTrivia()
.EmptyIfWhitespace()
.AddRange(token.LeadingTrivia.EmptyIfWhitespace())
.AddRange(token.TrailingTrivia);
MethodDeclarationSyntax newNode = methodDeclaration
.WithBody(body.WithTrailingTrivia(trivia))
.WithSemicolonToken(default(SyntaxToken));
return(document.ReplaceNodeAsync(methodDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case PropertyDeclarationSyntax propertyDeclaration:
{
AccessorListSyntax accessorList = propertyDeclaration.AccessorList;
if (accessorList == null)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Remove semicolon",
ct =>
{
SyntaxTriviaList trivia = accessorList
.GetTrailingTrivia()
.EmptyIfWhitespace()
.AddRange(token.LeadingTrivia.EmptyIfWhitespace())
.AddRange(token.TrailingTrivia);
PropertyDeclarationSyntax newNode = propertyDeclaration
.WithAccessorList(accessorList.WithTrailingTrivia(trivia))
.WithSemicolonToken(default(SyntaxToken));
return(document.ReplaceNodeAsync(propertyDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case AccessorDeclarationSyntax accessorDeclaration:
{
BlockSyntax body = accessorDeclaration.Body;
if (body == null)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Remove semicolon",
ct =>
{
SyntaxTriviaList trivia = body
.GetTrailingTrivia()
.EmptyIfWhitespace()
.AddRange(token.LeadingTrivia.EmptyIfWhitespace())
.AddRange(token.TrailingTrivia);
AccessorDeclarationSyntax newNode = accessorDeclaration
.WithBody(body.WithTrailingTrivia(trivia))
.WithSemicolonToken(default(SyntaxToken));
return(document.ReplaceNodeAsync(accessorDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
break;
}
case CompilerDiagnosticIdentifiers.CS0030_CannotConvertType:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeForEachType, document, root.SyntaxTree))
{
break;
}
if (!token.IsKind(SyntaxKind.ForEachKeyword))
{
break;
}
if (token.Parent is not ForEachStatementSyntax forEachStatement)
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ForEachStatementInfo info = semanticModel.GetForEachStatementInfo(forEachStatement);
ITypeSymbol typeSymbol = info.ElementType;
if (typeSymbol.SupportsExplicitDeclaration())
{
CodeFixRegistrator.ChangeType(context, diagnostic, forEachStatement.Type, typeSymbol, semanticModel, CodeFixIdentifiers.ChangeForEachType);
}
CodeFixRegistrator.ChangeTypeToVar(context, diagnostic, forEachStatement.Type, CodeFixIdentifiers.ChangeTypeToVar);
break;
}
case CompilerDiagnosticIdentifiers.CS1737_OptionalParametersMustAppearAfterAllRequiredParameters:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddDefaultValueToParameter, document, root.SyntaxTree))
{
break;
}
if (token.Parent is not BaseParameterListSyntax parameterList)
{
break;
}
SeparatedSyntaxList <ParameterSyntax> parameters = parameterList.Parameters;
ParameterSyntax parameter = null;
for (int i = 0; i < parameters.Count; i++)
{
ParameterSyntax p = parameters[i];
if (p.FullSpan.End <= token.SpanStart)
{
parameter = p;
}
else
{
break;
}
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
IParameterSymbol parameterSymbol = semanticModel.GetDeclaredSymbol(parameter, context.CancellationToken);
ITypeSymbol typeSymbol = parameterSymbol.Type;
if (typeSymbol.Kind == SymbolKind.ErrorType)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Add default value",
ct =>
{
ExpressionSyntax defaultValue = typeSymbol.GetDefaultValueSyntax(document.GetDefaultSyntaxOptions());
ParameterSyntax newParameter = parameter
.WithDefault(EqualsValueClause(defaultValue).WithTrailingTrivia(parameter.GetTrailingTrivia()))
.WithoutTrailingTrivia()
.WithFormatterAnnotation();
return(document.ReplaceNodeAsync(parameter, newParameter, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS8632_AnnotationForNullableReferenceTypesShouldOnlyBeUsedWithinNullableAnnotationsContext:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveAnnotationForNullableReferenceTypes, document, root.SyntaxTree))
{
break;
}
if (!token.IsKind(SyntaxKind.QuestionToken))
{
return;
}
CodeAction codeAction = CodeAction.Create(
"Remove 'nullable' annotation",
ct =>
{
var textChange = new TextChange(token.Span, "");
return(document.WithTextChangeAsync(textChange, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS8602_DereferenceOfPossiblyNullReference:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.UseNullForgivingOperator, document, root.SyntaxTree))
{
break;
}
Debug.Assert(token.IsKind(SyntaxKind.IdentifierToken), token.Kind().ToString());
if (!token.IsKind(SyntaxKind.IdentifierToken))
{
return;
}
if (!token.IsParentKind(SyntaxKind.IdentifierName))
{
return;
}
SyntaxNode node = token.Parent
.WalkUp(f => f.IsKind(SyntaxKind.SimpleMemberAccessExpression, SyntaxKind.InvocationExpression, SyntaxKind.ElementAccessExpression))
.Parent;
if (node.IsKind(SyntaxKind.ExpressionStatement) &&
token.SpanStart == node.SpanStart)
{
CodeAction codeAction = CodeAction.Create(
"Use null propagation operator",
ct =>
{
var textChange = new TextChange(new TextSpan(token.Span.End, 0), "?");
return(document.WithTextChangeAsync(textChange, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
return;
}
case CompilerDiagnosticIdentifiers.CS8604_PossibleNullReferenceArgumentForParameter:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.UseNullForgivingOperator, document, root.SyntaxTree))
{
break;
}
Debug.Assert(token.IsKind(SyntaxKind.IdentifierToken), token.Kind().ToString());
if (!token.IsKind(SyntaxKind.IdentifierToken))
{
return;
}
if (!token.IsParentKind(SyntaxKind.IdentifierName))
{
return;
}
CodeAction codeAction = CodeAction.Create(
"Use null-forgiving operator",
ct =>
{
var identifierName = (IdentifierNameSyntax)token.Parent;
PostfixUnaryExpressionSyntax newExpression = SuppressNullableWarningExpression(identifierName.WithoutTrivia())
.WithTriviaFrom(identifierName);
return(document.ReplaceNodeAsync(identifierName, newExpression, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
return;
}
case CompilerDiagnosticIdentifiers.CS8618_NonNullableMemberIsUninitialized:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.UseNullForgivingOperator, document, root.SyntaxTree))
{
break;
}
Debug.Assert(token.IsKind(SyntaxKind.IdentifierToken), token.Kind().ToString());
if (!token.IsKind(SyntaxKind.IdentifierToken))
{
return;
}
if (token.IsParentKind(SyntaxKind.PropertyDeclaration))
{
CodeAction codeAction = CodeAction.Create(
"Use null-forgiving operator",
ct =>
{
var property = (PropertyDeclarationSyntax)token.Parent;
PropertyDeclarationSyntax newProperty = property
.WithoutTrailingTrivia()
.WithInitializer(EqualsValueClause(SuppressNullableWarningExpression(NullLiteralExpression())))
.WithSemicolonToken(SemicolonToken().WithTrailingTrivia(property.GetTrailingTrivia()));
return(document.ReplaceNodeAsync(property, newProperty, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
else
{
SyntaxDebug.Assert(
(token.IsParentKind(SyntaxKind.VariableDeclarator) &&
token.Parent.IsParentKind(SyntaxKind.VariableDeclaration) &&
token.Parent.Parent.IsParentKind(SyntaxKind.FieldDeclaration, SyntaxKind.EventFieldDeclaration)) ||
token.IsParentKind(SyntaxKind.ConstructorDeclaration),
token);
if (token.IsParentKind(SyntaxKind.VariableDeclarator) &&
token.Parent.IsParentKind(SyntaxKind.VariableDeclaration) &&
token.Parent.Parent.IsParentKind(SyntaxKind.FieldDeclaration))
{
CodeAction codeAction = CodeAction.Create(
"Use null-forgiving operator",
ct =>
{
var declarator = (VariableDeclaratorSyntax)token.Parent;
VariableDeclaratorSyntax newDeclarator = declarator
.WithoutTrailingTrivia()
.WithInitializer(
EqualsValueClause(SuppressNullableWarningExpression(NullLiteralExpression()))
.WithTrailingTrivia(declarator.GetTrailingTrivia()));
return(document.ReplaceNodeAsync(declarator, newDeclarator, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
break;
}
case CompilerDiagnosticIdentifiers.CS8403_MethodWithIteratorBlockMustBeAsyncToReturnIAsyncEnumerableOfT:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddAsyncModifier, document, root.SyntaxTree))
{
break;
}
SyntaxDebug.Assert(token.IsKind(SyntaxKind.IdentifierToken), token);
SyntaxDebug.Assert(token.IsParentKind(SyntaxKind.MethodDeclaration, SyntaxKind.LocalFunctionStatement), token.Parent);
if (token.IsParentKind(SyntaxKind.MethodDeclaration, SyntaxKind.LocalFunctionStatement))
{
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
token.Parent,
SyntaxKind.AsyncKeyword,
additionalKey: CodeFixIdentifiers.AddAsyncModifier);
}
break;
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddDocumentationComment) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMethodReturnType) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MemberTypeMustMatchOverriddenMemberType) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddPartialModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassAbstract) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveParametersFromStaticConstructor) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveMemberDeclaration))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.MissingXmlCommentForPubliclyVisibleTypeOrMember:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddDocumentationComment))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Add documentation comment",
cancellationToken => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, false, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
CodeAction codeAction2 = CodeAction.Create(
"Add documentation comment (copy from base if available)",
cancellationToken => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, true, cancellationToken),
GetEquivalenceKey(diagnostic, "CopyFromBaseIfAvailable"));
context.RegisterCodeFix(codeAction2, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.MethodReturnTypeMustMatchOverriddenMethodReturnType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMethodReturnType))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var methodSymbol = (IMethodSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
ITypeSymbol typeSymbol = methodSymbol.OverriddenMethod.ReturnType;
if (typeSymbol?.IsErrorType() == false)
{
CodeAction codeAction = CodeAction.Create(
$"Change return type to '{SymbolDisplay.GetMinimalString(typeSymbol, semanticModel, memberDeclaration.SpanStart)}'",
cancellationToken => MemberTypeMustMatchOverriddenMemberTypeRefactoring.RefactorAsync(context.Document, memberDeclaration, typeSymbol, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case CompilerDiagnosticIdentifiers.PartialMethodsMustHaveVoidReturnType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMethodReturnType))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var methodDeclaration = (MethodDeclarationSyntax)memberDeclaration;
MethodDeclarationSyntax otherPart = semanticModel.GetOtherPart(methodDeclaration, context.CancellationToken);
if (otherPart == null)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Change return type to 'void'",
cancellationToken =>
{
return(context.Document.Solution().ReplaceNodesAsync(
new MethodDeclarationSyntax[] { methodDeclaration, otherPart },
(node, rewrittenNode) => node.WithReturnType(CSharpFactory.VoidType().WithTriviaFrom(node.ReturnType)),
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.MemberTypeMustMatchOverriddenMemberType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MemberTypeMustMatchOverriddenMemberType))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.IndexerDeclaration:
{
var propertySymbol = (IPropertySymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = propertySymbol.OverriddenProperty.Type;
break;
}
case SyntaxKind.EventDeclaration:
{
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
case SyntaxKind.EventFieldDeclaration:
{
VariableDeclaratorSyntax declarator = ((EventFieldDeclarationSyntax)memberDeclaration).Declaration.Variables.First();
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(declarator, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
}
if (typeSymbol?.IsErrorType() == false)
{
string title = $"Change type to '{SymbolDisplay.GetMinimalString(typeSymbol, semanticModel, memberDeclaration.SpanStart)}'";
CodeAction codeAction = CodeAction.Create(
title,
cancellationToken => MemberTypeMustMatchOverriddenMemberTypeRefactoring.RefactorAsync(context.Document, memberDeclaration, typeSymbol, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case CompilerDiagnosticIdentifiers.MissingPartialModifier:
case CompilerDiagnosticIdentifiers.PartialMethodMustBeDeclaredWithinPartialClassOrPartialStruct:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddPartialModifier))
{
break;
}
SyntaxNode node = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.MethodDeclaration:
{
if (memberDeclaration.IsParentKind(SyntaxKind.ClassDeclaration, SyntaxKind.StructDeclaration))
{
node = memberDeclaration.Parent;
}
break;
}
case SyntaxKind.ClassDeclaration:
case SyntaxKind.StructDeclaration:
case SyntaxKind.InterfaceDeclaration:
{
node = memberDeclaration;
break;
}
}
Debug.Assert(node != null, memberDeclaration.ToString());
if (node == null)
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
break;
}
case CompilerDiagnosticIdentifiers.MemberIsAbstractButItIsContainedInNonAbstractClass:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassAbstract))
{
break;
}
if (!memberDeclaration.IsParentKind(SyntaxKind.ClassDeclaration))
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
memberDeclaration.Parent,
SyntaxKind.AbstractKeyword,
title: "Make containing class abstract");
break;
}
case CompilerDiagnosticIdentifiers.StaticConstructorMustBeParameterless:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveParametersFromStaticConstructor))
{
break;
}
var constructorDeclaration = (ConstructorDeclarationSyntax)memberDeclaration;
CodeAction codeAction = CodeAction.Create(
"Remove parameters",
cancellationToken =>
{
ParameterListSyntax parameterList = constructorDeclaration.ParameterList;
ParameterListSyntax newParameterList = parameterList
.WithParameters(default(SeparatedSyntaxList <ParameterSyntax>))
.WithOpenParenToken(parameterList.OpenParenToken.WithoutTrailingTrivia())
.WithCloseParenToken(parameterList.CloseParenToken.WithoutLeadingTrivia());
ConstructorDeclarationSyntax newNode = constructorDeclaration.WithParameterList(newParameterList);
return(context.Document.ReplaceNodeAsync(constructorDeclaration, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.ExplicitInterfaceDeclarationCanOnlyBeDeclaredInClassOrStruct:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveMemberDeclaration))
{
break;
}
CodeFixRegistrator.RemoveMember(context, diagnostic, memberDeclaration);
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsAnyEnabled(
CodeFixIdentifiers.WrapInUnsafeStatement,
CodeFixIdentifiers.MakeContainingDeclarationUnsafe))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindNode(root, context.Span, out SyntaxNode node))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.PointersAndFixedSizeBuffersMayOnlyBeUsedInUnsafeContext:
{
bool fStatement = false;
bool fMemberDeclaration = false;
foreach (SyntaxNode ancestor in node.AncestorsAndSelf())
{
if (fStatement &&
fMemberDeclaration)
{
break;
}
if (!fStatement &&
ancestor is StatementSyntax)
{
fStatement = true;
if (!Settings.IsEnabled(CodeFixIdentifiers.WrapInUnsafeStatement))
{
continue;
}
var statement = (StatementSyntax)ancestor;
if (statement.IsKind(SyntaxKind.Block) &&
statement.Parent is StatementSyntax)
{
statement = (StatementSyntax)statement.Parent;
}
if (statement.IsKind(SyntaxKind.UnsafeStatement))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Wrap in unsafe block",
cancellationToken =>
{
BlockSyntax block = (statement.IsKind(SyntaxKind.Block))
? (BlockSyntax)statement
: SyntaxFactory.Block(statement);
UnsafeStatementSyntax unsafeStatement = SyntaxFactory.UnsafeStatement(block).WithFormatterAnnotation();
return(context.Document.ReplaceNodeAsync(statement, unsafeStatement, cancellationToken));
},
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.WrapInUnsafeStatement));
context.RegisterCodeFix(codeAction, diagnostic);
}
else if (!fMemberDeclaration &&
ancestor is MemberDeclarationSyntax)
{
fMemberDeclaration = true;
if (!Settings.IsEnabled(CodeFixIdentifiers.MakeContainingDeclarationUnsafe))
{
continue;
}
if (!CSharpFacts.CanHaveModifiers(ancestor.Kind()))
{
continue;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
ancestor,
SyntaxKind.UnsafeKeyword,
title: "Make containing declaration unsafe",
additionalKey: CodeFixIdentifiers.MakeContainingDeclarationUnsafe);
}
}
break;
}
}
}
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.RemoveRedundantOverridingMember:
{
CodeAction codeAction = CodeActionFactory.RemoveMemberDeclaration(context.Document, memberDeclaration, equivalenceKey: GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AddAccessibilityModifiersOrViceVersa:
{
if (diagnostic.Properties.TryGetValue(nameof(Accessibility), out string accessibilityText))
{
var accessibility = (Accessibility)Enum.Parse(typeof(Accessibility), accessibilityText);
CodeAction codeAction = CodeAction.Create(
"Add accessibility modifiers",
ct =>
{
MemberDeclarationSyntax newNode = SyntaxAccessibility.WithExplicitAccessibility(memberDeclaration, accessibility);
return(context.Document.ReplaceNodeAsync(memberDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
else
{
CodeAction codeAction = CodeAction.Create(
"Remove accessibility modifiers",
ct =>
{
MemberDeclarationSyntax newNode = SyntaxAccessibility.WithoutExplicitAccessibility(memberDeclaration);
return(context.Document.ReplaceNodeAsync(memberDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case DiagnosticIdentifiers.RemoveRedundantSealedModifier:
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, memberDeclaration, SyntaxKind.SealedKeyword);
break;
}
case DiagnosticIdentifiers.AvoidSemicolonAtEndOfDeclaration:
{
CodeAction codeAction = CodeAction.Create(
"Remove unnecessary semicolon",
cancellationToken => AvoidSemicolonAtEndOfDeclarationRefactoring.RefactorAsync(context.Document, memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.OrderModifiers:
{
CodeAction codeAction = CodeAction.Create(
"Order modifiers",
ct => OrderModifiersAsync(context.Document, memberDeclaration, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MakeFieldReadOnly:
{
var fieldDeclaration = (FieldDeclarationSyntax)memberDeclaration;
SeparatedSyntaxList <VariableDeclaratorSyntax> declarators = fieldDeclaration.Declaration.Variables;
string title = (declarators.Count == 1)
? $"Make '{declarators[0].Identifier.ValueText}' read-only"
: "Make fields read-only";
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, fieldDeclaration, SyntaxKind.ReadOnlyKeyword, title: title);
break;
}
case DiagnosticIdentifiers.UseConstantInsteadOfField:
{
CodeAction codeAction = CodeAction.Create(
"Use constant instead of field",
cancellationToken => UseConstantInsteadOfFieldRefactoring.RefactorAsync(context.Document, (FieldDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseReadOnlyAutoProperty:
{
CodeAction codeAction = CodeAction.Create(
"Use read-only auto-property",
cancellationToken => UseReadOnlyAutoPropertyAsync(context.Document, (PropertyDeclarationSyntax)memberDeclaration, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ConvertCommentToDocumentationComment:
{
CodeAction codeAction = CodeAction.Create(
ConvertCommentToDocumentationCommentRefactoring.Title,
cancellationToken => ConvertCommentToDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, context.Span, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.MakeMethodExtensionMethod:
{
var methodDeclaration = (MethodDeclarationSyntax)memberDeclaration;
CodeAction codeAction = CodeAction.Create(
"Make method an extension method",
cancellationToken =>
{
ParameterSyntax parameter = methodDeclaration.ParameterList.Parameters[0];
ParameterSyntax newParameter = ModifierList.Insert(parameter, SyntaxKind.ThisKeyword);
return(context.Document.ReplaceNodeAsync(parameter, newParameter, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindNode(root, context.Span, out SyntaxNode node))
{
return;
}
Document document = context.Document;
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.CS0214_PointersAndFixedSizeBuffersMayOnlyBeUsedInUnsafeContext:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.UseExplicitTypeInsteadOfVar, document, root.SyntaxTree) &&
node is StackAllocArrayCreationExpressionSyntax stackAllocArrayCreation &&
node.IsParentKind(SyntaxKind.EqualsValueClause) &&
node.Parent.IsParentKind(SyntaxKind.VariableDeclarator) &&
node.Parent.Parent.Parent is VariableDeclarationSyntax variableDeclaration &&
variableDeclaration.Type.IsVar)
{
TypeSyntax type = stackAllocArrayCreation.Type;
if (type is ArrayTypeSyntax arrayType)
{
type = arrayType.ElementType;
}
CodeAction spanCodeAction = CodeAction.Create(
"Use Span<T>",
ct =>
{
TypeSyntax spanOfT = SyntaxFactory.ParseTypeName($"global::System.Span<{type}>")
.WithSimplifierAnnotation();
return(document.ReplaceNodeAsync(variableDeclaration.Type, spanOfT, ct));
},
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.UseExplicitTypeInsteadOfVar, "System_Span_T"));
context.RegisterCodeFix(spanCodeAction, diagnostic);
CodeAction readOnlySpanCodeAction = CodeAction.Create(
"Use ReadOnlySpan<T>",
ct =>
{
TypeSyntax spanOfT = SyntaxFactory.ParseTypeName($"global::System.ReadOnlySpan<{type}>")
.WithSimplifierAnnotation();
return(document.ReplaceNodeAsync(variableDeclaration.Type, spanOfT, ct));
},
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.UseExplicitTypeInsteadOfVar, "System_ReadOnlySpan_T"));
context.RegisterCodeFix(readOnlySpanCodeAction, diagnostic);
}
var fStatement = false;
var fMemberDeclaration = false;
foreach (SyntaxNode ancestor in node.AncestorsAndSelf())
{
if (fStatement &&
fMemberDeclaration)
{
break;
}
if (!fStatement &&
ancestor is StatementSyntax)
{
fStatement = true;
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.WrapInUnsafeStatement, document, root.SyntaxTree))
{
continue;
}
var statement = (StatementSyntax)ancestor;
if (statement.IsKind(SyntaxKind.Block) &&
statement.Parent is StatementSyntax statement2)
{
statement = statement2;
}
if (statement.IsKind(SyntaxKind.UnsafeStatement))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Wrap in unsafe block",
ct =>
{
BlockSyntax block = (statement.IsKind(SyntaxKind.Block))
? (BlockSyntax)statement
: SyntaxFactory.Block(statement);
UnsafeStatementSyntax unsafeStatement = SyntaxFactory.UnsafeStatement(block).WithFormatterAnnotation();
return(document.ReplaceNodeAsync(statement, unsafeStatement, ct));
},
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.WrapInUnsafeStatement));
context.RegisterCodeFix(codeAction, diagnostic);
}
else if (!fMemberDeclaration &&
ancestor is MemberDeclarationSyntax)
{
fMemberDeclaration = true;
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.MakeContainingDeclarationUnsafe, document, root.SyntaxTree))
{
continue;
}
if (!CSharpFacts.CanHaveModifiers(ancestor.Kind()))
{
continue;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
ancestor,
SyntaxKind.UnsafeKeyword,
title: "Make containing declaration unsafe",
additionalKey: CodeFixIdentifiers.MakeContainingDeclarationUnsafe);
}
}
break;
}
}
}
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out MemberDeclarationSyntax memberDeclaration))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.CS1591_MissingXmlCommentForPubliclyVisibleTypeOrMember:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddDocumentationComment, context.Document, root.SyntaxTree))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Add documentation comment",
ct => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, false, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
CodeAction codeAction2 = CodeAction.Create(
"Add documentation comment (copy from base if available)",
ct => AddDocumentationCommentRefactoring.RefactorAsync(context.Document, memberDeclaration, true, ct),
GetEquivalenceKey(diagnostic, "CopyFromBaseIfAvailable"));
context.RegisterCodeFix(codeAction2, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS0508_MethodReturnTypeMustMatchOverriddenMethodReturnType:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeMethodReturnType, context.Document, root.SyntaxTree))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var methodSymbol = (IMethodSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
ITypeSymbol typeSymbol = methodSymbol.OverriddenMethod.ReturnType;
CodeFixRegistrator.ChangeTypeOrReturnType(context, diagnostic, memberDeclaration, typeSymbol, semanticModel);
break;
}
case CompilerDiagnosticIdentifiers.CS0766_PartialMethodsMustHaveVoidReturnType:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeMethodReturnType, context.Document, root.SyntaxTree))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
var methodDeclaration = (MethodDeclarationSyntax)memberDeclaration;
MethodDeclarationSyntax otherPart = semanticModel.GetOtherPart(methodDeclaration, context.CancellationToken);
if (otherPart == null)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Change return type to 'void'",
ct =>
{
return(context.Document.Solution().ReplaceNodesAsync(
new MethodDeclarationSyntax[] { methodDeclaration, otherPart },
(node, _) => node.WithReturnType(CSharpFactory.VoidType().WithTriviaFrom(node.ReturnType)),
ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS1715_MemberTypeMustMatchOverriddenMemberType:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.MemberTypeMustMatchOverriddenMemberType, context.Document, root.SyntaxTree))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.IndexerDeclaration:
{
var propertySymbol = (IPropertySymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = propertySymbol.OverriddenProperty.Type;
break;
}
case SyntaxKind.EventDeclaration:
{
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(memberDeclaration, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
case SyntaxKind.EventFieldDeclaration:
{
VariableDeclaratorSyntax declarator = ((EventFieldDeclarationSyntax)memberDeclaration).Declaration.Variables[0];
var eventSymbol = (IEventSymbol)semanticModel.GetDeclaredSymbol(declarator, context.CancellationToken);
typeSymbol = eventSymbol.OverriddenEvent.Type;
break;
}
}
CodeFixRegistrator.ChangeTypeOrReturnType(context, diagnostic, memberDeclaration, typeSymbol, semanticModel);
break;
}
case CompilerDiagnosticIdentifiers.CS0260_MissingPartialModifier:
case CompilerDiagnosticIdentifiers.CS0751_PartialMethodMustBeDeclaredInPartialClassOrPartialStruct:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddPartialModifier, context.Document, root.SyntaxTree))
{
break;
}
SyntaxNode node = null;
switch (memberDeclaration.Kind())
{
case SyntaxKind.MethodDeclaration:
{
if (memberDeclaration.IsParentKind(
SyntaxKind.ClassDeclaration,
SyntaxKind.StructDeclaration,
SyntaxKind.RecordDeclaration,
SyntaxKind.RecordStructDeclaration))
{
node = memberDeclaration.Parent;
}
break;
}
case SyntaxKind.ClassDeclaration:
case SyntaxKind.StructDeclaration:
case SyntaxKind.RecordStructDeclaration:
case SyntaxKind.InterfaceDeclaration:
case SyntaxKind.RecordDeclaration:
{
node = memberDeclaration;
break;
}
}
SyntaxDebug.Assert(node != null, memberDeclaration);
if (node == null)
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.PartialKeyword, title: $"Make {CSharpFacts.GetTitle(node)} partial");
break;
}
case CompilerDiagnosticIdentifiers.CS0513_MemberIsAbstractButItIsContainedInNonAbstractClass:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.MakeContainingClassAbstract, context.Document, root.SyntaxTree))
{
break;
}
if (!memberDeclaration.IsParentKind(SyntaxKind.ClassDeclaration))
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
memberDeclaration.Parent,
SyntaxKind.AbstractKeyword,
title: "Make containing class abstract");
break;
}
case CompilerDiagnosticIdentifiers.CS0132_StaticConstructorMustBeParameterless:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveParametersFromStaticConstructor, context.Document, root.SyntaxTree))
{
break;
}
var constructorDeclaration = (ConstructorDeclarationSyntax)memberDeclaration;
CodeAction codeAction = CodeAction.Create(
"Remove parameters",
ct =>
{
ParameterListSyntax parameterList = constructorDeclaration.ParameterList;
ParameterListSyntax newParameterList = parameterList
.WithParameters(default(SeparatedSyntaxList <ParameterSyntax>))
.WithOpenParenToken(parameterList.OpenParenToken.WithoutTrailingTrivia())
.WithCloseParenToken(parameterList.CloseParenToken.WithoutLeadingTrivia());
ConstructorDeclarationSyntax newNode = constructorDeclaration.WithParameterList(newParameterList);
return(context.Document.ReplaceNodeAsync(constructorDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS0541_ExplicitInterfaceDeclarationCanOnlyBeDeclaredInClassOrStruct:
case CompilerDiagnosticIdentifiers.CS0525_InterfacesCannotContainFields:
case CompilerDiagnosticIdentifiers.CS0567_InterfacesCannotContainOperators:
case CompilerDiagnosticIdentifiers.CS0524_InterfacesCannotDeclareTypes:
case CompilerDiagnosticIdentifiers.CS0575_OnlyClassTypesCanContainDestructors:
case CompilerDiagnosticIdentifiers.CS0568_StructsCannotContainExplicitParameterlessConstructors:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveMemberDeclaration, context.Document, root.SyntaxTree))
{
break;
}
CodeFixRegistrator.RemoveMemberDeclaration(context, diagnostic, memberDeclaration);
break;
}
case CompilerDiagnosticIdentifiers.CS0574_NameOfDestructorMustMatchNameOfClass:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RenameDestructorToMatchClassName, context.Document, root.SyntaxTree))
{
break;
}
if (memberDeclaration is not DestructorDeclarationSyntax destructorDeclaration)
{
break;
}
if (memberDeclaration.Parent is not ClassDeclarationSyntax classDeclaration)
{
break;
}
if (classDeclaration.Identifier.ValueText.Length == 0)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Rename destructor to match class name",
ct =>
{
DestructorDeclarationSyntax newNode = destructorDeclaration.WithIdentifier(classDeclaration.Identifier.WithTriviaFrom(destructorDeclaration.Identifier));
return(context.Document.ReplaceNodeAsync(destructorDeclaration, newNode, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS8139_CannotChangeTupleElementNameWhenOverridingInheritedMember:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RenameTupleElement, context.Document, root.SyntaxTree))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (memberDeclaration is MethodDeclarationSyntax methodDeclaration)
{
IMethodSymbol methodSymbol = semanticModel.GetDeclaredSymbol(methodDeclaration, context.CancellationToken);
if (methodSymbol.ReturnType is not INamedTypeSymbol tupleType)
{
break;
}
if (!tupleType.IsTupleType)
{
break;
}
if (methodSymbol.OverriddenMethod?.ReturnType is not INamedTypeSymbol baseTupleType)
{
break;
}
if (!baseTupleType.IsTupleType)
{
break;
}
ImmutableArray <IFieldSymbol> elements = tupleType.TupleElements;
ImmutableArray <IFieldSymbol> baseElements = baseTupleType.TupleElements;
if (elements.Length != baseElements.Length)
{
break;
}
int i = 0;
while (i < elements.Length)
{
if (elements[i].Name != baseElements[i].Name)
{
break;
}
i++;
}
if (i == elements.Length)
{
break;
}
TupleElementSyntax tupleElement = ((TupleTypeSyntax)methodDeclaration.ReturnType).Elements[i];
CodeAction codeAction = CodeAction.Create(
$"Rename '{elements[i].Name}' to '{baseElements[i].Name}'",
ct => RenameTupleElementAsync(context.Document, methodDeclaration, tupleElement, elements[i], baseElements[i].Name, semanticModel, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
else if (memberDeclaration is PropertyDeclarationSyntax propertyDeclaration)
{
IPropertySymbol propertySymbol = semanticModel.GetDeclaredSymbol(propertyDeclaration, context.CancellationToken);
if (propertySymbol.Type is not INamedTypeSymbol tupleType)
{
break;
}
if (!tupleType.IsTupleType)
{
break;
}
if (propertySymbol.OverriddenProperty?.Type is not INamedTypeSymbol baseTupleType)
{
break;
}
if (!baseTupleType.IsTupleType)
{
break;
}
ImmutableArray <IFieldSymbol> elements = tupleType.TupleElements;
ImmutableArray <IFieldSymbol> baseElements = baseTupleType.TupleElements;
if (elements.Length != baseElements.Length)
{
break;
}
int i = 0;
while (i < elements.Length)
{
if (elements[i].Name != baseElements[i].Name)
{
break;
}
i++;
}
if (i == elements.Length)
{
break;
}
TupleElementSyntax tupleElement = ((TupleTypeSyntax)propertyDeclaration.Type).Elements[i];
CodeAction codeAction = CodeAction.Create(
$"Rename '{elements[i].Name}' to '{baseElements[i].Name}'",
ct => RenameTupleElementAsync(context.Document, propertyDeclaration, tupleElement, elements[i], baseElements[i].Name, semanticModel, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case CompilerDiagnosticIdentifiers.CS3000_MethodsWithVariableArgumentsAreNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3001_ArgumentTypeIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3002_ReturnTypeIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3003_TypeOfVariableIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3005_IdentifierDifferingOnlyInCaseIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3006_OverloadedMethodDifferingOnlyInRefOrOutOrInArrayRankIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3007_OverloadedMethodDifferingOnlyByUnnamedArrayTypesIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3008_IdentifierIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3009_BaseTypeIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3016_ArraysAsAttributeArgumentsIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3024_ConstraintTypeIsNotCLSCompliant:
case CompilerDiagnosticIdentifiers.CS3027_TypeIsNotCLSCompliantBecauseBaseInterfaceIsNotCLSCompliant:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.MarkDeclarationAsNonCLSCompliant, context.Document, root.SyntaxTree))
{
break;
}
CodeAction codeAction = CodeAction.Create(
$"Mark {CSharpFacts.GetTitle(memberDeclaration)} as non-CLS-compliant",
ct => MarkDeclarationAsNonCLSCompliantAsync(context.Document, memberDeclaration, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.CS0539_ExplicitInterfaceDeclarationIsNotMemberOfInterface:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddParameterToExplicitlyImplementedInterfaceMember, context.Document, root.SyntaxTree))
{
break;
}
var context2 = new CommonFixContext(
context.Document,
GetEquivalenceKey(diagnostic),
await context.GetSemanticModelAsync().ConfigureAwait(false),
context.CancellationToken);
CodeAction codeAction = AddParameterToInterfaceMemberRefactoring.ComputeRefactoringForExplicitImplementation(context2, memberDeclaration);
if (codeAction != null)
{
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
}
}
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindToken(root, context.Span.Start, out SyntaxToken token))
{
return;
}
SyntaxNode node = token.Parent;
if (!CSharpFacts.CanHaveModifiers(node.Kind()))
{
node = node.FirstAncestor(f => CSharpFacts.CanHaveModifiers(f.Kind()));
}
Debug.Assert(node != null, $"{nameof(node)} is null");
if (node == null)
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.CS0106_ModifierIsNotValidForThisItem:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
break;
}
SyntaxTokenList modifiers = SyntaxInfo.ModifierListInfo(node).Modifiers;
if (modifiers.Contains(token))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, token);
break;
}
else if (IsInterfaceMemberOrExplicitInterfaceImplementation(node))
{
ModifiersCodeFixRegistrator.RemoveModifiers(
context,
diagnostic,
node,
modifiers,
f =>
{
switch (f.Kind())
{
case SyntaxKind.PublicKeyword:
case SyntaxKind.ProtectedKeyword:
case SyntaxKind.InternalKeyword:
case SyntaxKind.PrivateKeyword:
case SyntaxKind.StaticKeyword:
case SyntaxKind.VirtualKeyword:
case SyntaxKind.OverrideKeyword:
case SyntaxKind.AbstractKeyword:
{
return(true);
}
}
return(false);
});
}
else if (node.IsKind(SyntaxKind.MethodDeclaration, SyntaxKind.PropertyDeclaration, SyntaxKind.IndexerDeclaration, SyntaxKind.EventDeclaration, SyntaxKind.EventFieldDeclaration) &&
node.IsParentKind(SyntaxKind.StructDeclaration, SyntaxKind.RecordStructDeclaration) &&
modifiers.Contains(SyntaxKind.VirtualKeyword))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.VirtualKeyword);
}
else if (node.IsKind(SyntaxKind.IndexerDeclaration) &&
modifiers.Contains(SyntaxKind.StaticKeyword))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword);
}
else if (node.IsKind(SyntaxKind.PropertyDeclaration, SyntaxKind.IndexerDeclaration, SyntaxKind.EventDeclaration, SyntaxKind.EventFieldDeclaration) &&
modifiers.Contains(SyntaxKind.AsyncKeyword))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.AsyncKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0107_MoreThanOneProtectionModifier:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, token);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0275_AccessibilityModifiersMayNotBeUsedOnAccessorsInInterface:
case CompilerDiagnosticIdentifiers.CS0515_AccessModifiersAreNotAllowedOnStaticConstructors:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveAccessibility(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.CS1609_ModifiersCannotBePlacedOnEventAccessorDeclarations:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifiers(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0753_OnlyMethodsClassesStructsOrInterfacesMayBePartial:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0441_ClassCannotBeBothStaticAndSealed:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
break;
}
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: nameof(SyntaxKind.StaticKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.SealedKeyword, additionalKey: nameof(SyntaxKind.SealedKeyword));
break;
}
case CompilerDiagnosticIdentifiers.CS0678_FieldCanNotBeBothVolatileAndReadOnly:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
break;
}
var fieldDeclaration = (FieldDeclarationSyntax)node;
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, fieldDeclaration, SyntaxKind.VolatileKeyword, additionalKey: nameof(SyntaxKind.VolatileKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, fieldDeclaration, SyntaxKind.ReadOnlyKeyword, additionalKey: nameof(SyntaxKind.ReadOnlyKeyword));
break;
}
case CompilerDiagnosticIdentifiers.CS0628_NewProtectedMemberDeclaredInSealedClass:
case CompilerDiagnosticIdentifiers.CS1057_StaticClassesCannotContainProtectedMembers:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeAccessibility, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrPrivate);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0621_VirtualOrAbstractMembersCannotBePrivate:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveVirtualModifier, context.Document, root.SyntaxTree))
{
ModifierListInfo modifierInfo = SyntaxInfo.ModifierListInfo(node);
if (modifierInfo.IsVirtual)
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.VirtualKeyword, additionalKey: nameof(SyntaxKind.VirtualKeyword));
}
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeAccessibility, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrProtected);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0442_AbstractPropertiesCannotHavePrivateAccessors:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveAccessibility(context, diagnostic, node, additionalKey: CodeFixIdentifiers.RemoveInvalidModifier);
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeAccessibility, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrProtected);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0112_StaticMemberCannotBeMarkedOverrideVirtualOrAbstract:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
break;
}
if (!node.IsParentKind(SyntaxKind.ClassDeclaration) ||
!((ClassDeclarationSyntax)node.Parent).Modifiers.Contains(SyntaxKind.StaticKeyword))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: nameof(SyntaxKind.StaticKeyword));
}
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.OverrideKeyword, additionalKey: nameof(SyntaxKind.OverrideKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.VirtualKeyword, additionalKey: nameof(SyntaxKind.VirtualKeyword));
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.AbstractKeyword, additionalKey: nameof(SyntaxKind.AbstractKeyword));
break;
}
case CompilerDiagnosticIdentifiers.CS1994_AsyncModifierCanOnlyBeUsedInMethodsThatHaveBody:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.AsyncKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0750_PartialMethodCannotHaveAccessModifiersOrVirtualAbstractOverrideNewSealedOrExternModifiers:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
break;
}
ModifiersCodeFixRegistrator.RemoveModifiers(
context,
diagnostic,
node,
f =>
{
switch (f.Kind())
{
case SyntaxKind.PublicKeyword:
case SyntaxKind.ProtectedKeyword:
case SyntaxKind.InternalKeyword:
case SyntaxKind.PrivateKeyword:
case SyntaxKind.VirtualKeyword:
case SyntaxKind.AbstractKeyword:
case SyntaxKind.OverrideKeyword:
case SyntaxKind.NewKeyword:
case SyntaxKind.SealedKeyword:
case SyntaxKind.ExternKeyword:
{
return(true);
}
}
return(false);
});
break;
}
case CompilerDiagnosticIdentifiers.CS1105_ExtensionMethodMustBeStatic:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddStaticModifier, context.Document, root.SyntaxTree))
{
AddStaticModifier(context, diagnostic, node, CodeFixIdentifiers.AddStaticModifier);
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveThisModifier, context.Document, root.SyntaxTree))
{
var methodDeclaration = (MethodDeclarationSyntax)node;
ParameterSyntax parameter = methodDeclaration.ParameterList.Parameters[0];
SyntaxToken modifier = parameter.Modifiers.Find(SyntaxKind.ThisKeyword);
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, parameter, modifier, additionalKey: CodeFixIdentifiers.RemoveThisModifier);
}
break;
}
case CompilerDiagnosticIdentifiers.CS1106_ExtensionMethodMustBeDefinedInNonGenericStaticClass:
{
if (node is not ClassDeclarationSyntax classDeclaration)
{
return;
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddStaticModifier, context.Document, root.SyntaxTree) &&
!classDeclaration.Modifiers.Contains(SyntaxKind.StaticKeyword))
{
AddStaticModifier(context, diagnostic, node, CodeFixIdentifiers.AddStaticModifier);
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveThisModifier, context.Document, root.SyntaxTree))
{
IEnumerable <ParameterSyntax> thisParameters = classDeclaration.Members
.Where(f => f.IsKind(SyntaxKind.MethodDeclaration))
.Cast <MethodDeclarationSyntax>()
.Select(f => f.ParameterList?.Parameters.FirstOrDefault())
.Where(f => f?.Modifiers.Contains(SyntaxKind.ThisKeyword) == true);
ModifiersCodeFixRegistrator.RemoveModifier(
context,
diagnostic,
thisParameters,
SyntaxKind.ThisKeyword,
title: "Remove 'this' modifier from extension methods",
additionalKey: CodeFixIdentifiers.RemoveThisModifier);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0759_NoDefiningDeclarationFoundForImplementingDeclarationOfPartialMethod:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.CS1100_MethodHasParameterModifierThisWhichIsNotOnFirstParameter:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveThisModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, token.Parent, token);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0708_CannotDeclareInstanceMembersInStaticClass:
case CompilerDiagnosticIdentifiers.CS0710_StaticClassesCannotHaveInstanceConstructors:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddStaticModifier, context.Document, root.SyntaxTree))
{
AddStaticModifier(context, diagnostic, node, CodeFixIdentifiers.AddStaticModifier);
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.MakeContainingClassNonStatic, context.Document, root.SyntaxTree))
{
var classDeclaration = (ClassDeclarationSyntax)node.Parent;
ModifiersCodeFixRegistrator.RemoveModifier(
context,
diagnostic,
classDeclaration,
classDeclaration.Modifiers.Find(SyntaxKind.StaticKeyword),
title: "Make containing class non-static",
additionalKey: CodeFixIdentifiers.MakeContainingClassNonStatic);
}
break;
}
case CompilerDiagnosticIdentifiers.CS1527_ElementsDefinedInNamespaceCannotBeExplicitlyDeclaredAsPrivateProtectedOrProtectedInternal:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.ChangeAccessibility, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.ChangeAccessibility(context, diagnostic, node, _publicOrInternal);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0101_NamespaceAlreadyContainsDefinition:
case CompilerDiagnosticIdentifiers.CS0102_TypeAlreadyContainsDefinition:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddPartialModifier, context.Document, root.SyntaxTree))
{
break;
}
if (!node.IsKind(
SyntaxKind.ClassDeclaration,
SyntaxKind.StructDeclaration,
SyntaxKind.RecordStructDeclaration,
SyntaxKind.InterfaceDeclaration,
SyntaxKind.MethodDeclaration))
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ISymbol symbol = semanticModel.GetDeclaredSymbol(node, context.CancellationToken);
ImmutableArray <SyntaxReference> syntaxReferences = symbol.DeclaringSyntaxReferences;
if (syntaxReferences.Length <= 1)
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(
context,
diagnostic,
ImmutableArray.CreateRange(syntaxReferences, f => f.GetSyntax(context.CancellationToken)),
SyntaxKind.PartialKeyword,
title: $"Make {CSharpFacts.GetTitle(node)} partial");
break;
}
case CompilerDiagnosticIdentifiers.CS0115_NoSuitableMethodFoundToOverride:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveInvalidModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.OverrideKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.CS1988_AsyncMethodsCannotHaveRefOrOutParameters:
case CompilerDiagnosticIdentifiers.CS1623_IteratorsCannotHaveRefOrOutParameters:
case CompilerDiagnosticIdentifiers.CS0192_ReadOnlyFieldCannotBePassedAsRefOrOutValue:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveRefModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.RefKeyword, additionalKey: nameof(SyntaxKind.RefKeyword));
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveOutModifier, context.Document, root.SyntaxTree))
{
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.OutKeyword, additionalKey: nameof(SyntaxKind.OutKeyword));
}
break;
}
case CompilerDiagnosticIdentifiers.CS0573_CannotHaveInstancePropertyOrFieldInitializersInStruct:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddStaticModifier, context.Document, root.SyntaxTree))
{
AddStaticModifier(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0501_MemberMustDeclareBodyBecauseItIsNotMarkedAbstractExternOrPartial:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.AddModifierAbstract, context.Document, root.SyntaxTree) &&
node.IsKind(SyntaxKind.MethodDeclaration) &&
(node.Parent as ClassDeclarationSyntax)?.Modifiers.Contains(SyntaxKind.AbstractKeyword) == true)
{
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.AbstractKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.CS0549_NewVirtualMemberInSealedClass:
{
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveVirtualModifier, context.Document, root.SyntaxTree))
{
if (node is AccessorDeclarationSyntax &&
SyntaxInfo.ModifierListInfo(node.Parent.Parent).IsVirtual)
{
node = node.Parent.Parent;
}
ModifiersCodeFixRegistrator.RemoveModifier(
context,
diagnostic,
node,
SyntaxKind.VirtualKeyword,
additionalKey: CodeFixIdentifiers.RemoveVirtualModifier);
}
if (IsEnabled(diagnostic.Id, CodeFixIdentifiers.MakeContainingClassUnsealed, context.Document, root.SyntaxTree) &&
node.Parent is ClassDeclarationSyntax classDeclaration)
{
ModifiersCodeFixRegistrator.RemoveModifier(
context,
diagnostic,
classDeclaration,
SyntaxKind.SealedKeyword,
title: "Make containing class unsealed",
additionalKey: CodeFixIdentifiers.MakeContainingClassUnsealed);
}
break;
}
case CompilerDiagnosticIdentifiers.CS8340_InstanceFieldsOfReadOnlyStructsMustBeReadOnly:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.MakeMemberReadOnly, context.Document, root.SyntaxTree))
{
break;
}
ModifiersCodeFixRegistrator.AddModifier(context, diagnostic, node, SyntaxKind.ReadOnlyKeyword);
break;
}
case CompilerDiagnosticIdentifiers.CS0238_MemberCannotBeSealedBecauseItIsNotOverride:
{
if (!IsEnabled(diagnostic.Id, CodeFixIdentifiers.RemoveSealedModifier, context.Document, root.SyntaxTree))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (semanticModel.GetDiagnostic(
CompilerDiagnosticIdentifiers.CS0114_MemberHidesInheritedMemberToMakeCurrentMethodOverrideThatImplementationAddOverrideKeyword,
CSharpUtility.GetIdentifier(node).Span,
context.CancellationToken) != null)
{
break;
}
ModifiersCodeFixRegistrator.RemoveModifier(context, diagnostic, node, SyntaxKind.SealedKeyword);
break;
}
}
}
}