private static bool CheckTrivia(ElseClauseSyntax elseClause, IfStatementSyntax ifStatement)
{
TextSpan elseSpan = elseClause.Span;
TextSpan ifSpan = ifStatement.Span;
TextSpan span = TextSpan.FromBounds(elseSpan.Start, ifSpan.Start);
TextSpan span2 = TextSpan.FromBounds(ifSpan.End, elseSpan.End);
foreach (SyntaxTrivia trivia in elseClause.DescendantTrivia())
{
TextSpan triviaSpan = trivia.Span;
if (span.Contains(triviaSpan))
{
if (!trivia.IsWhitespaceOrEndOfLineTrivia())
{
return(false);
}
}
else if (span2.Contains(triviaSpan))
{
if (!trivia.IsWhitespaceOrEndOfLineTrivia())
{
return(false);
}
}
}
return(true);
}
public static void Analyze(SyntaxNodeAnalysisContext context, ElseClauseSyntax elseClause)
{
StatementSyntax statement = elseClause.Statement;
if (statement?.IsKind(SyntaxKind.Block) == true)
{
var block = (BlockSyntax)statement;
if (!block.Statements.Any() &&
elseClause
.DescendantTrivia(elseClause.Span)
.All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
context.ReportDiagnostic(DiagnosticDescriptors.RemoveEmptyElseClause, elseClause);
}
}
}