private static void AnalyzeMethodDeclaration(SyntaxNodeAnalysisContext context)
{
var methodDeclaration = (MethodDeclarationSyntax)context.Node;
BlockSyntax body = methodDeclaration.Body;
if (body != null)
{
if (body.ContainsDirectives)
{
return;
}
BlockExpressionAnalysis analysis = BlockExpressionAnalysis.Create(body);
if (!analysis.Success)
{
return;
}
if (!context.IsAnalyzerSuppressed(AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine) &&
methodDeclaration.SyntaxTree.IsMultiLineSpan(methodDeclaration.HeaderSpan()))
{
return;
}
AnalyzeBlock(context, body, analysis);
}
else
{
ArrowExpressionClauseSyntax expressionBody = methodDeclaration.ExpressionBody;
if (expressionBody?.ContainsDirectives == false)
{
if (!context.IsAnalyzerSuppressed(AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine) &&
methodDeclaration.SyntaxTree.IsMultiLineSpan(methodDeclaration.HeaderSpan()))
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.ReportOnly.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine, expressionBody);
return;
}
if (!context.IsAnalyzerSuppressed(AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine) &&
expressionBody.Expression?.IsMultiLine() == true)
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.ReportOnly.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine, expressionBody);
}
}
}
}
private static void AnalyzeBlock(SyntaxNodeAnalysisContext context, BlockSyntax block, BlockExpressionAnalysis analysis)
{
if (AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine.IsEnabled(context) &&
analysis.Expression.IsMultiLine())
{
return;
}
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(block.OpenBraceToken))
{
return;
}
if (!analysis.ReturnOrThrowKeyword.LeadingTrivia.IsEmptyOrWhitespace())
{
return;
}
ReportDiagnostic(context, analysis.Block, analysis.Expression);
}
private static void AnalyzeAccessorDeclarationBlock(
SyntaxNodeAnalysisContext context,
AccessorDeclarationSyntax accessor,
BlockSyntax body)
{
if (body.ContainsDirectives)
{
return;
}
if (accessor.AttributeLists.Any())
{
return;
}
bool isGetter = accessor.IsKind(SyntaxKind.GetAccessorDeclaration);
BlockExpressionAnalysis analysis = BlockExpressionAnalysis.Create(body, allowExpressionStatement: !isGetter);
ExpressionSyntax expression = analysis.Expression;
if (expression == null)
{
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBody.IsEnabled(context))
{
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine.IsEnabled(context) &&
expression.IsMultiLine())
{
return;
}
if (isGetter &&
accessor.Parent is AccessorListSyntax accessorList &&
accessorList.Accessors.Count == 1)
{
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(accessorList.OpenBraceToken))
{
return;
}
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(accessor.Keyword))
{
return;
}
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(body.OpenBraceToken))
{
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine.IsEnabled(context))
{
switch (accessorList.Parent.Kind())
{
case SyntaxKind.PropertyDeclaration:
{
if (accessor.SyntaxTree.IsMultiLineSpan(((PropertyDeclarationSyntax)accessorList.Parent).HeaderSpan()))
{
return;
}
break;
}
case SyntaxKind.IndexerDeclaration:
{
if (accessor.SyntaxTree.IsMultiLineSpan(((IndexerDeclarationSyntax)accessorList.Parent).HeaderSpan()))
{
return;
}
break;
}
default:
{
Debug.Fail(accessorList.Parent.Kind().ToString());
break;
}
}
return;
}
ReportDiagnostic(context, accessorList, expression);
ReportFadeOut(context, accessor.Keyword, body);
return;
}
if (!accessor.Keyword.TrailingTrivia.IsEmptyOrWhitespace())
{
return;
}
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(body.OpenBraceToken))
{
return;
}
if (!accessor.Keyword.LeadingTrivia.IsEmptyOrWhitespace())
{
return;
}
ReportDiagnostic(context, body, expression);
}
private static void AnalyzeLocalFunctionStatement(SyntaxNodeAnalysisContext context)
{
if (!DiagnosticRules.ConvertBlockBodyToExpressionBodyOrViceVersa.IsEffective(context))
{
return;
}
var localFunction = (LocalFunctionStatementSyntax)context.Node;
BlockSyntax body = localFunction.Body;
if (body != null)
{
if (body.ContainsDirectives)
{
return;
}
BlockExpressionAnalysis analysis = BlockExpressionAnalysis.Create(body);
if (!analysis.Success)
{
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBody.IsEnabled(context))
{
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine.IsEnabled(context) &&
localFunction.SyntaxTree.IsMultiLineSpan(localFunction.HeaderSpan()))
{
return;
}
AnalyzeBlock(context, body, analysis);
}
else
{
ArrowExpressionClauseSyntax expressionBody = localFunction.ExpressionBody;
if (expressionBody?.ContainsDirectives == false)
{
if (AnalyzerOptions.ConvertExpressionBodyToBlockBody.IsEnabled(context))
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticRules.ReportOnly.ConvertExpressionBodyToBlockBody, expressionBody, AnalyzerOptions.ConvertExpressionBodyToBlockBody);
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine.IsEnabled(context) &&
localFunction.SyntaxTree.IsMultiLineSpan(localFunction.HeaderSpan()))
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticRules.ReportOnly.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine, expressionBody, AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenDeclarationIsMultiLine);
return;
}
if (AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine.IsEnabled(context) &&
expressionBody.Expression?.IsMultiLine() == true)
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticRules.ReportOnly.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine, expressionBody, AnalyzerOptions.ConvertExpressionBodyToBlockBodyWhenExpressionIsMultiLine);
}
}
}
}
private static void AnalyzeBlock(SyntaxNodeAnalysisContext context, BlockSyntax block, BlockExpressionAnalysis analysis, BodyStyle style)
{
if (style.UseBlockWhenExpressionIsMultiLine == true
&& analysis.Expression.IsMultiLine())
{
return;
}
if (!style.UseExpression)
return;
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(block.OpenBraceToken))
return;
if (!analysis.ReturnOrThrowKeyword.LeadingTrivia.IsEmptyOrWhitespace())
return;
ReportDiagnostic(context, analysis.Block);
}
private static void AnalyzeMethodDeclaration(SyntaxNodeAnalysisContext context)
{
var methodDeclaration = (MethodDeclarationSyntax)context.Node;
BlockSyntax body = methodDeclaration.Body;
if (body != null)
{
if (body.ContainsDirectives)
return;
BodyStyle style = context.GetBodyStyle();
if (style.IsDefault)
return;
BlockExpressionAnalysis analysis = BlockExpressionAnalysis.Create(body);
if (!analysis.Success)
return;
if (!style.UseExpression)
return;
if (style.UseBlockWhenDeclarationIsMultiLine == true
&& methodDeclaration.SyntaxTree.IsMultiLineSpan(methodDeclaration.HeaderSpan()))
{
return;
}
AnalyzeBlock(context, body, analysis, style);
}
else
{
ArrowExpressionClauseSyntax expressionBody = methodDeclaration.ExpressionBody;
if (expressionBody?.ContainsDirectives == false)
{
BodyStyle style = context.GetBodyStyle();
if (style.IsDefault)
return;
if (style.UseBlock)
{
ReportDiagnostic(context, expressionBody);
return;
}
if (style.UseBlockWhenDeclarationIsMultiLine == true
&& methodDeclaration.SyntaxTree.IsMultiLineSpan(methodDeclaration.HeaderSpan()))
{
ReportDiagnostic(context, expressionBody);
return;
}
if (style.UseBlockWhenExpressionIsMultiLine == true
&& expressionBody.Expression?.IsMultiLine() == true)
{
ReportDiagnostic(context, expressionBody);
}
}
}
}
private static void AnalyzeAccessorDeclarationBlock(
SyntaxNodeAnalysisContext context,
AccessorDeclarationSyntax accessor,
BlockSyntax body)
{
if (body.ContainsDirectives)
return;
if (accessor.AttributeLists.Any())
return;
BodyStyle style = context.GetBodyStyle();
if (style.IsDefault)
return;
bool isGetter = accessor.IsKind(SyntaxKind.GetAccessorDeclaration);
BlockExpressionAnalysis analysis = BlockExpressionAnalysis.Create(body, allowExpressionStatement: !isGetter);
ExpressionSyntax expression = analysis.Expression;
if (expression == null)
return;
if (!style.UseExpression)
return;
if (style.UseBlockWhenExpressionIsMultiLine == true
&& expression.IsMultiLine())
{
return;
}
if (isGetter
&& accessor.Parent is AccessorListSyntax accessorList
&& accessorList.Accessors.Count == 1)
{
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(accessorList.OpenBraceToken))
return;
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(accessor.Keyword))
return;
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(body.OpenBraceToken))
return;
if (style.UseBlockWhenDeclarationIsMultiLine == true)
{
switch (accessorList.Parent.Kind())
{
case SyntaxKind.PropertyDeclaration:
{
if (accessor.SyntaxTree.IsMultiLineSpan(((PropertyDeclarationSyntax)accessorList.Parent).HeaderSpan()))
return;
break;
}
case SyntaxKind.IndexerDeclaration:
{
if (accessor.SyntaxTree.IsMultiLineSpan(((IndexerDeclarationSyntax)accessorList.Parent).HeaderSpan()))
return;
break;
}
default:
{
SyntaxDebug.Fail(accessorList.Parent);
break;
}
}
return;
}
ReportDiagnostic(context, accessorList);
return;
}
if (!accessor.Keyword.TrailingTrivia.IsEmptyOrWhitespace())
return;
if (!SyntaxTriviaAnalysis.IsExteriorTriviaEmptyOrWhitespace(body.OpenBraceToken))
return;
if (!accessor.Keyword.LeadingTrivia.IsEmptyOrWhitespace())
return;
ReportDiagnostic(context, body);
}