private void AnalyzeConditionalExpression(SyntaxNodeAnalysisContext context)
{
if (GeneratedCodeAnalyzer?.IsGeneratedCode(context) == true)
{
return;
}
var conditionalExpression = (ConditionalExpressionSyntax)context.Node;
if (conditionalExpression.Condition?.IsKind(SyntaxKind.ParenthesizedExpression) == false)
{
context.ReportDiagnostic(
DiagnosticDescriptors.WrapConditionalExpressionConditionInParentheses,
conditionalExpression.Condition.GetLocation());
}
if (conditionalExpression.Condition?.IsMissing == false &&
CanBeConvertedToCoalesceExpression(conditionalExpression) &&
conditionalExpression
.DescendantTrivia(conditionalExpression.Span)
.All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
context.ReportDiagnostic(
DiagnosticDescriptors.ReplaceConditionalExpressionWithCoalesceExpression,
conditionalExpression.GetLocation());
}
if (SimplifyConditionalExpressionRefactoring.CanRefactor(conditionalExpression, context.SemanticModel, context.CancellationToken) &&
!conditionalExpression.SpanContainsDirectives())
{
context.ReportDiagnostic(
DiagnosticDescriptors.SimplifyConditionalExpression,
conditionalExpression.GetLocation());
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
ConditionalExpressionSyntax conditionalExpression = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf <ConditionalExpressionSyntax>();
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.ParenthesizeConditionInConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Wrap condition in parentheses",
cancellationToken => ParenthesizeConditionInConditionalExpressionRefactoring.RefactorAsync(context.Document, conditionalExpression, cancellationToken),
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReplaceConditionalExpressionWithCoalesceExpression:
{
CodeAction codeAction = CodeAction.Create(
"Replace ?: with ??",
cancellationToken =>
{
return(ReplaceConditionalExpressionWithCoalesceExpressionRefactoring.RefactorAsync(
context.Document,
conditionalExpression,
cancellationToken));
},
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.SimplifyConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Simplify conditional expression",
cancellationToken =>
{
return(SimplifyConditionalExpressionRefactoring.RefactorAsync(
context.Document,
conditionalExpression,
cancellationToken));
},
diagnostic.Id + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
private void AnalyzeConditionalExpression(SyntaxNodeAnalysisContext context)
{
var conditionalExpression = (ConditionalExpressionSyntax)context.Node;
ParenthesizeConditionInConditionalExpressionRefactoring.Analyze(context, conditionalExpression);
SimplifyConditionalExpressionRefactoring.Analyze(context, conditionalExpression);
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out ConditionalExpressionSyntax conditionalExpression))
{
return;
}
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.ParenthesizeConditionInConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Wrap condition in parentheses",
cancellationToken => ParenthesizeConditionInConditionalExpressionRefactoring.RefactorAsync(context.Document, conditionalExpression, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseCoalesceExpressionInsteadOfConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Use coalesce expression",
cancellationToken =>
{
return(UseCoalesceExpressionInsteadOfConditionalExpressionRefactoring.RefactorAsync(
context.Document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.SimplifyConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Simplify conditional expression",
cancellationToken =>
{
return(SimplifyConditionalExpressionRefactoring.RefactorAsync(
context.Document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.FormatConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Format ? and : on next line",
cancellationToken =>
{
return(FormatConditionalExpressionRefactoring.RefactorAsync(
context.Document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseConditionalAccessInsteadOfConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Use conditional access",
cancellationToken =>
{
return(UseConditionalAccessRefactoring.RefactorAsync(
context.Document,
conditionalExpression,
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 ConditionalExpressionSyntax conditionalExpression))
{
return;
}
Document document = context.Document;
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.ParenthesizeConditionInConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Wrap condition in parentheses",
cancellationToken => ParenthesizeConditionInConditionalExpressionRefactoring.RefactorAsync(document, conditionalExpression, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseCoalesceExpressionInsteadOfConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Use coalesce expression",
cancellationToken =>
{
return(SimplifyNullCheckRefactoring.RefactorAsync(
document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.SimplifyConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Simplify conditional expression",
cancellationToken =>
{
return(SimplifyConditionalExpressionRefactoring.RefactorAsync(
document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.FormatConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Format ? and : on next line",
cancellationToken =>
{
return(FormatConditionalExpressionRefactoring.RefactorAsync(
document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UseConditionalAccessInsteadOfConditionalExpression:
{
CodeAction codeAction = CodeAction.Create(
"Use conditional access",
cancellationToken =>
{
return(SimplifyNullCheckRefactoring.RefactorAsync(
document,
conditionalExpression,
cancellationToken));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.AvoidNestedConditionalOperators:
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
(CodeAction codeAction, CodeAction recursiveCodeAction) = ConvertConditionalOperatorToIfElseRefactoring.ComputeRefactoring(
document,
conditionalExpression,
data: default,
recursiveData: new CodeActionData(ConvertConditionalOperatorToIfElseRefactoring.Title, GetEquivalenceKey(diagnostic)),
semanticModel,
context.CancellationToken);
if (recursiveCodeAction != null)
{
context.RegisterCodeFix(recursiveCodeAction, diagnostic);
}
break;
}
}
}
