protected override SignatureHelpModel GetModel(SemanticModel semanticModel, CoalesceExpressionSyntax node, int position)
{
var span = node.Span;
var signature = SignatureHelpExtensions.GetCoalesceSignatureItem();
var signatures = new[] { signature };
var parameterIndex = node.ArgumentList.GetParameterIndex(position);
return(new SignatureHelpModel(span, signatures, signature, parameterIndex));
}
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 SignatureHelpModel GetModel(SemanticModel semanticModel, NullIfExpressionSyntax node, int position)
{
var span = node.Span;
var signature = SignatureHelpExtensions.GetNullIfSignatureItem();
var signatures = new[] { signature };
var commaToken = node.CommaToken;
var isBeforeComma = commaToken.IsMissing || position <= commaToken.Span.Start;
var parameterIndex = isBeforeComma ? 0 : 1;
return(new SignatureHelpModel(span, signatures, signature, parameterIndex));
}
private void RegisterSignatureHelpProvider()
{
var controller = new NQuerySignatureHelpController();
RegisterService(controller);
var provider = new NQuerySignatureHelpProvider();
provider.Providers.AddRange(SignatureHelpExtensions.GetStandardSignatureHelpModelProviders());
RegisterService <INQuerySignatureHelpProvider>(provider);
RegisterService <IParameterInfoProvider>(provider);
}
public SignatureHelpModelProviderService([ImportMany] IEnumerable <ISignatureHelpModelProvider> providers)
{
Providers = providers.Concat(SignatureHelpExtensions.GetStandardSignatureHelpModelProviders()).ToImmutableArray();
}
protected override IEnumerable <SignatureItem> GetExpectedSignatures(SemanticModel semanticModel)
{
yield return(SignatureHelpExtensions.GetCoalesceSignatureItem());
}
