public override SignatureHelpState GetCurrentArgumentState(SyntaxNode root, int position, ISyntaxFactsService syntaxFacts, TextSpan currentSpan, CancellationToken cancellationToken)
{
if (GetOuterMostTupleExpressionInSpan(root, position, syntaxFacts, currentSpan, cancellationToken, out var expression))
{
return(CommonSignatureHelpUtilities.GetSignatureHelpState(expression, position,
getOpenToken: s_getOpenToken,
getCloseToken: s_getCloseToken,
getArgumentsWithSeparators: s_getArgumentsWithSeparators,
getArgumentNames: s_getArgumentNames));
}
if (GetOuterMostParenthesizedExpressionInSpan(root, position, syntaxFacts, currentSpan, cancellationToken, out var parenthesizedExpression))
{
if (currentSpan.Start == parenthesizedExpression.SpanStart)
{
return(new SignatureHelpState(
argumentIndex: 0,
argumentCount: 0,
argumentName: string.Empty,
argumentNames: null));
}
}
return(null);
}
internal static SignatureHelpState GetSignatureHelpState(AttributeArgumentListSyntax argumentList, int position)
{
return(CommonSignatureHelpUtilities.GetSignatureHelpState(
argumentList, position,
s_getAttributeArgumentListOpenToken,
s_getAttributeArgumentListCloseToken,
s_getAttributeArgumentListArgumentsWithSeparators,
s_getAttributeArgumentListNames));
}
internal static SignatureHelpState GetSignatureHelpState(InitializerExpressionSyntax argumentList, int position)
{
return(CommonSignatureHelpUtilities.GetSignatureHelpState(
argumentList, position,
s_getInitializerExpressionOpenToken,
s_getInitializerExpressionCloseToken,
s_getInitializerExpressionArgumentsWithSeparators,
s_getInitializerExpressionNames));
}