static public NamedTypeSymbol AsUnboundGenericType(this NamedTypeSymbol type)
{
if (!type.IsGenericType)
{
// This exception is part of the public contract of NamedTypeSymbol.ConstructUnboundGenericType
throw new InvalidOperationException();
}
var original = type.OriginalDefinition;
int n = original.Arity;
NamedTypeSymbol originalContainingType = original.ContainingType;
var constructedFrom = ((object)originalContainingType == null) ?
original :
original.AsMember(originalContainingType.IsGenericType ? originalContainingType.AsUnboundGenericType() : originalContainingType);
if (n == 0)
{
return(constructedFrom);
}
var typeArguments = UnboundArgumentErrorTypeSymbol.CreateTypeArguments(
constructedFrom.TypeParameters,
n,
new CSDiagnosticInfo(ErrorCode.ERR_UnexpectedUnboundGenericName));
return(constructedFrom.Construct(typeArguments, unbound: true));
}