protected override SignatureHelpModel GetModel(SemanticModel semanticModel, CastExpressionSyntax node, int position)
{
var span = node.Span;
var signature = SignatureHelpExtensions.GetCastSignatureItem();
var signatures = new[] { signature };
var asKeyword = node.AsKeyword;
var isBeforeAsKeyword = asKeyword.IsMissing || position <= asKeyword.Span.Start;
var parameterIndex = isBeforeAsKeyword ? 0 : 1;
return(new SignatureHelpModel(span, signatures, signature, parameterIndex));
}
protected override IEnumerable <SignatureItem> GetExpectedSignatures(SemanticModel semanticModel)
{
yield return(SignatureHelpExtensions.GetCastSignatureItem());
}