public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveDuplicateModifier))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindToken(root, context.Span.Start, out SyntaxToken token))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.DuplicateModifier:
{
ModifiersCodeFixes.RemoveModifier(
context,
diagnostic,
token.Parent,
token,
additionalKey: CodeFixIdentifiers.RemoveDuplicateModifier);
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveNewModifier))
{
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.MemberDoesNotHideAccessibleMember:
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, memberDeclaration, SyntaxKind.NewKeyword);
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out TypeDeclarationSyntax typeDeclaration))
{
return;
}
ModifiersCodeFixes.RemoveModifier(context, context.Diagnostics[0], typeDeclaration, SyntaxKind.PartialKeyword);
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeClassNonStatic))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out TypeSyntax type))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.StaticTypesCannotBeUsedAsTypeArguments:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(type, context.CancellationToken)?.OriginalDefinition;
if (typeSymbol == null)
{
break;
}
if (!typeSymbol.IsClass())
{
break;
}
ImmutableArray <SyntaxReference> syntaxReferences = typeSymbol.DeclaringSyntaxReferences;
if (!syntaxReferences.Any())
{
break;
}
ModifiersCodeFixes.RemoveModifier(
context,
diagnostic,
ImmutableArray.CreateRange(syntaxReferences, f => f.GetSyntax()),
SyntaxKind.StaticKeyword,
title: "Make class non-static");
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())
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
else
{
ModifiersCodeFixes.AddModifier(context, diagnostic, parameter, SyntaxKind.ParamsKeyword);
}
break;
}
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddComparisonWithBooleanLiteral) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.CreateSingletonArray) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseUncheckedExpression) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConstModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ReplaceNullLiteralExpressionWithDefaultValue) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseCoalesceExpression) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConditionThatIsAlwaysEqualToTrueOrFalse))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindNode(root, context.Span, out ExpressionSyntax expression))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.CannotImplicitlyConvertTypeExplicitConversionExists:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
TypeInfo typeInfo = semanticModel.GetTypeInfo(expression, context.CancellationToken);
ITypeSymbol type = typeInfo.Type;
ITypeSymbol convertedType = typeInfo.ConvertedType;
if (type?.IsNamedType() == true)
{
var namedType = (INamedTypeSymbol)type;
if (namedType.ConstructedFrom.SpecialType == SpecialType.System_Nullable_T)
{
if (convertedType?.IsBoolean() == true ||
AddComparisonWithBooleanLiteralRefactoring.IsCondition(expression))
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddComparisonWithBooleanLiteral))
{
CodeAction codeAction = CodeAction.Create(
AddComparisonWithBooleanLiteralRefactoring.GetTitle(expression),
cancellationToken => AddComparisonWithBooleanLiteralRefactoring.RefactorAsync(context.Document, expression, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.AddComparisonWithBooleanLiteral));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
else if (namedType.TypeArguments[0].Equals(convertedType))
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseCoalesceExpression))
{
CodeAction codeAction = CodeAction.Create(
"Use coalesce expression",
cancellationToken =>
{
ExpressionSyntax defaultValue = convertedType.ToDefaultValueSyntax(semanticModel, expression.SpanStart);
ExpressionSyntax newNode = CoalesceExpression(expression.WithoutTrivia(), defaultValue)
.WithTriviaFrom(expression)
.Parenthesize()
.WithFormatterAnnotation();
return(context.Document.ReplaceNodeAsync(expression, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.UseCoalesceExpression));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
}
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.CreateSingletonArray) &&
type?.IsErrorType() == false &&
!type.Equals(convertedType) &&
convertedType.IsArrayType())
{
var arrayType = (IArrayTypeSymbol)convertedType;
if (semanticModel.IsImplicitConversion(expression, arrayType.ElementType))
{
CodeAction codeAction = CodeAction.Create(
"Create singleton array",
cancellationToken => CreateSingletonArrayRefactoring.RefactorAsync(context.Document, expression, arrayType.ElementType, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.CreateSingletonArray));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
break;
}
case CompilerDiagnosticIdentifiers.ConstantValueCannotBeConverted:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseUncheckedExpression))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Use 'unchecked'",
cancellationToken =>
{
CheckedExpressionSyntax newNode = CSharpFactory.UncheckedExpression(expression.WithoutTrivia());
newNode = newNode.WithTriviaFrom(expression);
return(context.Document.ReplaceNodeAsync(expression, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.ExpressionBeingAssignedMustBeConstant:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConstModifier))
{
break;
}
LocalDeclarationStatementSyntax localDeclarationStatement = GetLocalDeclarationStatement(expression);
if (localDeclarationStatement == null)
{
break;
}
SyntaxTokenList modifiers = localDeclarationStatement.Modifiers;
if (!modifiers.Contains(SyntaxKind.ConstKeyword))
{
break;
}
ModifiersCodeFixes.RemoveModifier(context, diagnostic, localDeclarationStatement, SyntaxKind.ConstKeyword);
break;
}
case CompilerDiagnosticIdentifiers.CannotConvertNullToTypeBecauseItIsNonNullableValueType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ReplaceNullLiteralExpressionWithDefaultValue))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(expression, context.CancellationToken).ConvertedType;
if (typeSymbol?.SupportsExplicitDeclaration() == true)
{
CodeAction codeAction = CodeAction.Create(
"Replace 'null' with default value",
cancellationToken =>
{
ExpressionSyntax newNode = typeSymbol.ToDefaultValueSyntax(semanticModel, expression.SpanStart);
return(context.Document.ReplaceNodeAsync(expression, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case CompilerDiagnosticIdentifiers.ResultOfExpressionIsAlwaysConstantSinceValueIsNeverEqualToNull:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConditionThatIsAlwaysEqualToTrueOrFalse))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (!NullCheckExpression.TryCreate(expression, semanticModel, out NullCheckExpression nullCheck, context.CancellationToken))
{
break;
}
if (nullCheck.Kind != NullCheckKind.EqualsToNull &&
nullCheck.Kind != NullCheckKind.NotEqualsToNull)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Remove condition",
cancellationToken =>
{
SyntaxNode newRoot = RemoveHelper.RemoveCondition(root, expression, nullCheck.Kind == NullCheckKind.NotEqualsToNull);
return(Task.FromResult(context.Document.WithSyntaxRoot(newRoot)));
},
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 redundant overridding {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:
{
ModifiersCodeFixes.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";
ModifiersCodeFixes.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(
"Replace comment with documentation comment",
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.AddComparisonWithBooleanLiteral) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.CreateSingletonArray) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseUncheckedExpression) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConstModifier) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ReplaceNullLiteralExpressionWithDefaultValue) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseCoalesceExpression) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConditionThatIsAlwaysEqualToTrueOrFalse) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.IntroduceLocalVariable) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.IntroduceField) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ReplaceStringLiteralWithCharacterLiteral) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseYieldReturnInsteadOfReturn) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMemberTypeAccordingToReturnExpression)
)
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindNode(root, context.Span, out ExpressionSyntax expression))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.CannotImplicitlyConvertTypeExplicitConversionExists:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
TypeInfo typeInfo = semanticModel.GetTypeInfo(expression, context.CancellationToken);
ITypeSymbol type = typeInfo.Type;
ITypeSymbol convertedType = typeInfo.ConvertedType;
if ((type is INamedTypeSymbol namedType) &&
namedType.ConstructedFrom.SpecialType == SpecialType.System_Nullable_T)
{
if (convertedType?.IsBoolean() == true ||
AddComparisonWithBooleanLiteralRefactoring.IsCondition(expression))
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddComparisonWithBooleanLiteral))
{
CodeAction codeAction = CodeAction.Create(
AddComparisonWithBooleanLiteralRefactoring.GetTitle(expression),
cancellationToken => AddComparisonWithBooleanLiteralRefactoring.RefactorAsync(context.Document, expression, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.AddComparisonWithBooleanLiteral));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
else if (namedType.TypeArguments[0].Equals(convertedType))
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseCoalesceExpression))
{
CodeAction codeAction = CodeAction.Create(
"Use coalesce expression",
cancellationToken =>
{
ExpressionSyntax defaultValue = convertedType.ToDefaultValueSyntax(semanticModel, expression.SpanStart);
ExpressionSyntax newNode = CoalesceExpression(expression.WithoutTrivia(), defaultValue)
.WithTriviaFrom(expression)
.Parenthesize()
.WithFormatterAnnotation();
return(context.Document.ReplaceNodeAsync(expression, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.UseCoalesceExpression));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMemberTypeAccordingToReturnExpression))
{
ChangeMemberTypeRefactoring.ComputeCodeFix(context, diagnostic, expression, semanticModel);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddCastExpression))
{
CodeFixRegistrator.AddCastExpression(context, diagnostic, expression, convertedType, semanticModel);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.CreateSingletonArray) &&
type?.IsErrorType() == false &&
!type.Equals(convertedType) &&
(convertedType is IArrayTypeSymbol arrayType) &&
semanticModel.IsImplicitConversion(expression, arrayType.ElementType))
{
CodeAction codeAction = CodeAction.Create(
"Create singleton array",
cancellationToken => CreateSingletonArrayRefactoring.RefactorAsync(context.Document, expression, arrayType.ElementType, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.CreateSingletonArray));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
case CompilerDiagnosticIdentifiers.ConstantValueCannotBeConverted:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseUncheckedExpression))
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Use 'unchecked'",
cancellationToken =>
{
CheckedExpressionSyntax newNode = CSharpFactory.UncheckedExpression(expression.WithoutTrivia());
newNode = newNode.WithTriviaFrom(expression);
return(context.Document.ReplaceNodeAsync(expression, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.ExpressionBeingAssignedMustBeConstant:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConstModifier))
{
break;
}
LocalDeclarationStatementSyntax localDeclarationStatement = GetLocalDeclarationStatement(expression);
if (localDeclarationStatement == null)
{
break;
}
SyntaxTokenList modifiers = localDeclarationStatement.Modifiers;
if (!modifiers.Contains(SyntaxKind.ConstKeyword))
{
break;
}
ModifiersCodeFixes.RemoveModifier(context, diagnostic, localDeclarationStatement, SyntaxKind.ConstKeyword);
break;
}
case CompilerDiagnosticIdentifiers.CannotConvertNullToTypeBecauseItIsNonNullableValueType:
case CompilerDiagnosticIdentifiers.CannotConvertNullToTypeParameterBecauseItCouldBeNonNullableValueType:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ReplaceNullLiteralExpressionWithDefaultValue))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(expression, context.CancellationToken).ConvertedType;
if (typeSymbol?.SupportsExplicitDeclaration() != true)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Replace 'null' with default value",
cancellationToken =>
{
ExpressionSyntax newNode = typeSymbol.ToDefaultValueSyntax(semanticModel, expression.SpanStart);
return(context.Document.ReplaceNodeAsync(expression, newNode, cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.ResultOfExpressionIsAlwaysConstantSinceValueIsNeverEqualToNull:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveConditionThatIsAlwaysEqualToTrueOrFalse))
{
break;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (!NullCheckExpression.TryCreate(expression, semanticModel, out NullCheckExpression nullCheck, context.CancellationToken))
{
break;
}
if (nullCheck.Kind != NullCheckKind.EqualsToNull &&
nullCheck.Kind != NullCheckKind.NotEqualsToNull)
{
break;
}
CodeAction codeAction = CodeAction.Create(
"Remove condition",
cancellationToken =>
{
SyntaxNode newRoot = RemoveHelper.RemoveCondition(root, expression, nullCheck.Kind == NullCheckKind.NotEqualsToNull);
return(Task.FromResult(context.Document.WithSyntaxRoot(newRoot)));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case CompilerDiagnosticIdentifiers.OnlyAssignmentCallIncrementDecrementAndNewObjectExpressionsCanBeUsedAsStatement:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (expression.Parent is ArrowExpressionClauseSyntax arrowExpresssionClause)
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMemberTypeAccordingToReturnExpression))
{
break;
}
ChangeMemberTypeRefactoring.ComputeCodeFix(context, diagnostic, expression, semanticModel);
}
else if (expression.Parent is ExpressionStatementSyntax expressionStatement)
{
if (!Settings.IsAnyCodeFixEnabled(
CodeFixIdentifiers.IntroduceLocalVariable,
CodeFixIdentifiers.IntroduceField))
{
break;
}
if (semanticModel.GetSymbol(expression, context.CancellationToken)?.IsErrorType() != false)
{
break;
}
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(expression, context.CancellationToken);
if (typeSymbol?.IsErrorType() != false)
{
break;
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.IntroduceLocalVariable) &&
!expressionStatement.IsEmbedded())
{
bool addAwait = typeSymbol.IsConstructedFromTaskOfT(semanticModel) &&
semanticModel.GetEnclosingSymbol(expressionStatement.SpanStart, context.CancellationToken).IsAsyncMethod();
CodeAction codeAction = CodeAction.Create(
IntroduceLocalVariableRefactoring.GetTitle(expression),
cancellationToken => IntroduceLocalVariableRefactoring.RefactorAsync(context.Document, expressionStatement, typeSymbol, addAwait, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.IntroduceLocalVariable));
context.RegisterCodeFix(codeAction, diagnostic);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.IntroduceField))
{
CodeAction codeAction = CodeAction.Create(
$"Introduce field for '{expression}'",
cancellationToken => IntroduceFieldRefactoring.RefactorAsync(context.Document, expressionStatement, typeSymbol, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.IntroduceField));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
break;
}
case CompilerDiagnosticIdentifiers.CannotImplicitlyConvertType:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeMemberTypeAccordingToReturnExpression))
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ChangeMemberTypeRefactoring.ComputeCodeFix(context, diagnostic, expression, semanticModel);
break;
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ReplaceStringLiteralWithCharacterLiteral) &&
expression?.IsKind(SyntaxKind.StringLiteralExpression) == true)
{
var literalExpression = (LiteralExpressionSyntax)expression;
if (literalExpression.Token.ValueText.Length == 1)
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (semanticModel.GetTypeInfo(expression, context.CancellationToken).ConvertedType?.IsChar() == true)
{
CodeAction codeAction = CodeAction.Create(
"Replace string literal with character literal",
cancellationToken => ReplaceStringLiteralWithCharacterLiteralRefactoring.RefactorAsync(context.Document, literalExpression, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.ReplaceStringLiteralWithCharacterLiteral));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.UseYieldReturnInsteadOfReturn) &&
expression.IsParentKind(SyntaxKind.ReturnStatement))
{
var returnStatement = (ReturnStatementSyntax)expression.Parent;
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ISymbol containingSymbol = semanticModel.GetEnclosingSymbol(returnStatement.SpanStart, context.CancellationToken);
if (containingSymbol?.IsKind(SymbolKind.Method) == true &&
((IMethodSymbol)containingSymbol).ReturnType?.IsIEnumerableOrConstructedFromIEnumerableOfT() == true)
{
CodeAction codeAction = CodeAction.Create(
"Use yield return instead of return",
cancellationToken => UseYieldReturnInsteadOfReturnRefactoring.RefactorAsync(context.Document, returnStatement, SyntaxKind.YieldReturnStatement, semanticModel, cancellationToken),
GetEquivalenceKey(diagnostic, CodeFixIdentifiers.UseYieldReturnInsteadOfReturn));
context.RegisterCodeFix(codeAction, diagnostic);
}
}
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.MakeMemberNonStatic) &&
!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveParametersFromStaticConstructor))
{
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)
{
TypeSyntax newType = typeSymbol.ToMinimalTypeSyntax(semanticModel, memberDeclaration.SpanStart);
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;
}
ModifiersCodeFixes.AddModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
break;
}
case CompilerDiagnosticIdentifiers.MemberIsAbstractButItIsContainedInNonAbstractClass:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeContainingClassAbstract))
{
break;
}
if (!memberDeclaration.IsParentKind(SyntaxKind.ClassDeclaration))
{
break;
}
ModifiersCodeFixes.AddModifier(
context,
diagnostic,
memberDeclaration.Parent,
SyntaxKind.AbstractKeyword,
title: "Make containing class abstract");
break;
}
case CompilerDiagnosticIdentifiers.ObjectReferenceIsRequiredForNonStaticMember:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.MakeMemberNonStatic))
{
break;
}
Debug.Assert(memberDeclaration.GetModifiers().Contains(SyntaxKind.StaticKeyword), memberDeclaration.ToString());
if (!memberDeclaration.GetModifiers().Contains(SyntaxKind.StaticKeyword))
{
break;
}
ModifiersCodeFixes.RemoveModifier(
context,
diagnostic,
memberDeclaration,
SyntaxKind.StaticKeyword,
title: $"Make containing {memberDeclaration.GetTitle()} non-static");
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;
}
}
}
}
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))
{
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))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, token);
break;
}
else if (IsInterfaceMemberOrExplicitInterfaceImplementation(node))
{
ModifiersCodeFixes.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))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword);
}
else if (node.IsKind(SyntaxKind.PropertyDeclaration))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.AsyncKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.MoreThanOneProtectionModifier:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, token);
}
break;
}
case CompilerDiagnosticIdentifiers.AccessibilityModifiersMayNotBeUsedOnAccessorsInInterface:
case CompilerDiagnosticIdentifiers.AccessModifiersAreNotAllowedOnStaticConstructors:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveAccessModifiers(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.ModifiersCannotBePlacedOnEventAccessorDeclarations:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveModifiers(context, diagnostic, node);
}
break;
}
case CompilerDiagnosticIdentifiers.OnlyMethodsClassesStructsOrInterfacesMayBePartial:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.ClassCannotBeBothStaticAndSealed:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
SyntaxTokenList modifiers = node.GetModifiers();
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: nameof(SyntaxKind.StaticKeyword));
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.SealedKeyword, additionalKey: nameof(SyntaxKind.SealedKeyword));
break;
}
case CompilerDiagnosticIdentifiers.FieldCanNotBeBothVolatileAndReadOnly:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
var fieldDeclaration = (FieldDeclarationSyntax)node;
SyntaxTokenList modifiers = fieldDeclaration.Modifiers;
ModifiersCodeFixes.RemoveModifier(context, diagnostic, fieldDeclaration, SyntaxKind.VolatileKeyword, additionalKey: nameof(SyntaxKind.VolatileKeyword));
ModifiersCodeFixes.RemoveModifier(context, diagnostic, fieldDeclaration, SyntaxKind.ReadOnlyKeyword, additionalKey: nameof(SyntaxKind.ReadOnlyKeyword));
break;
}
case CompilerDiagnosticIdentifiers.NewProtectedMemberDeclaredInSealedClass:
case CompilerDiagnosticIdentifiers.StaticClassesCannotContainProtectedMembers:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixes.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrPrivate);
}
break;
}
case CompilerDiagnosticIdentifiers.VirtualOrAbstractmembersCannotBePrivate:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixes.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrProtected);
}
break;
}
case CompilerDiagnosticIdentifiers.AbstractPropertiesCannotHavePrivateAccessors:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveAccessModifiers(context, diagnostic, node, additionalKey: CodeFixIdentifiers.RemoveInvalidModifier);
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.ChangeAccessibility))
{
ModifiersCodeFixes.ChangeAccessibility(context, diagnostic, node, _publicOrInternalOrProtected);
}
break;
}
case CompilerDiagnosticIdentifiers.StaticMemberCannotBeMarkedOverrideVirtualOrAbstract:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
SyntaxTokenList modifiers = node.GetModifiers();
if (!node.IsParentKind(SyntaxKind.ClassDeclaration) ||
!((ClassDeclarationSyntax)node.Parent).Modifiers.Contains(SyntaxKind.StaticKeyword))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.StaticKeyword, additionalKey: nameof(SyntaxKind.StaticKeyword));
}
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.OverrideKeyword, additionalKey: nameof(SyntaxKind.OverrideKeyword));
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.VirtualKeyword, additionalKey: nameof(SyntaxKind.VirtualKeyword));
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.AbstractKeyword, additionalKey: nameof(SyntaxKind.AbstractKeyword));
break;
}
case CompilerDiagnosticIdentifiers.AsyncModifierCanOnlyBeUsedInMethodsThatHaveBody:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.AsyncKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.PartialMethodCannotHaveAccessModifiersOrVirtualAbstractOverrideNewSealedOrExternModifiers:
{
if (!Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
break;
}
ModifiersCodeFixes.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);
ModifiersCodeFixes.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);
ModifiersCodeFixes.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))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.PartialKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.MethodHasParameterModifierThisWhichIsNotOnFirstParameter:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveThisModifier))
{
ModifiersCodeFixes.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;
ModifiersCodeFixes.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))
{
ModifiersCodeFixes.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;
}
ModifiersCodeFixes.AddModifier(
context,
diagnostic,
ImmutableArray.CreateRange(syntaxReferences, f => f.GetSyntax(context.CancellationToken)),
SyntaxKind.PartialKeyword);
break;
}
case CompilerDiagnosticIdentifiers.NoSuitableMethodFoundToOverride:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveInvalidModifier))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.OverrideKeyword);
}
break;
}
case CompilerDiagnosticIdentifiers.AsyncMethodsCannotHaveRefOrOutParameters:
case CompilerDiagnosticIdentifiers.IteratorsCannotHaveRefOrOutParameters:
case CompilerDiagnosticIdentifiers.ReadOnlyFieldCannotBeUsedAsRefOrOutValue:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveRefModifier))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.RefKeyword, additionalKey: nameof(SyntaxKind.RefKeyword));
}
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.RemoveOutModifier))
{
ModifiersCodeFixes.RemoveModifier(context, diagnostic, node, SyntaxKind.OutKeyword, additionalKey: nameof(SyntaxKind.OutKeyword));
}
break;
}
case CompilerDiagnosticIdentifiers.CannotHaveInstancePropertyOrFieldInitializersInStruct:
{
if (Settings.IsCodeFixEnabled(CodeFixIdentifiers.AddStaticModifier))
{
AddStaticModifier(context, diagnostic, node);
}
break;
}
}
}
}