private static void AnalyzeConditionalExpression(SyntaxNodeAnalysisContext context)
{
var conditionalExpression = (ConditionalExpressionSyntax)context.Node;
ExpressionSyntax condition = conditionalExpression.Condition;
if (condition.IsMissing)
{
return;
}
ExpressionSyntax whenTrue = conditionalExpression.WhenTrue;
if (whenTrue.IsMissing)
{
return;
}
NewLinePosition newLinePosition = context.GetConditionalExpressionNewLinePosition();
if (newLinePosition == NewLinePosition.None)
{
return;
}
if (SyntaxTriviaAnalysis.IsTokenFollowedWithNewLineAndNotPrecededWithNewLine(condition, conditionalExpression.QuestionToken, whenTrue))
{
if (newLinePosition == NewLinePosition.Before)
{
ReportDiagnostic(conditionalExpression.QuestionToken, ImmutableDictionary <string, string> .Empty, "before");
return;
}
}
else if (SyntaxTriviaAnalysis.IsTokenPrecededWithNewLineAndNotFollowedWithNewLine(condition, conditionalExpression.QuestionToken, whenTrue))
{
if (newLinePosition == NewLinePosition.After)
{
ReportDiagnostic(conditionalExpression.QuestionToken, DiagnosticProperties.AnalyzerOption_Invert, "after");
return;
}
}
ExpressionSyntax whenFalse = conditionalExpression.WhenFalse;
if (!whenFalse.IsMissing)
{
if (SyntaxTriviaAnalysis.IsTokenFollowedWithNewLineAndNotPrecededWithNewLine(whenTrue, conditionalExpression.ColonToken, whenFalse))
{
if (newLinePosition == NewLinePosition.Before)
{
ReportDiagnostic(conditionalExpression.ColonToken, ImmutableDictionary <string, string> .Empty, "before");
}
}
else if (SyntaxTriviaAnalysis.IsTokenPrecededWithNewLineAndNotFollowedWithNewLine(whenTrue, conditionalExpression.ColonToken, whenFalse))
{
if (newLinePosition == NewLinePosition.After)
{
ReportDiagnostic(conditionalExpression.ColonToken, DiagnosticProperties.AnalyzerOption_Invert, "after");
}
}
}
void ReportDiagnostic(
SyntaxToken token,
ImmutableDictionary <string, string> properties,
string messageArg)
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.PlaceNewLineAfterOrBeforeConditionalOperator,
Location.Create(token.SyntaxTree, token.Span.WithLength(0)),
properties: properties,
messageArg);
}
}
