/// <summary>
/// Returns the constructed form of the provided generic type.
/// </summary>
public static string GetConstructed(this TypeConverter formatter, string unconstructed, params Type[] typeArguments)
{
var typeString = unconstructed;
var indicatorIndex = typeString.IndexOf(GenericTypeIndicator);
var argumentsIndex = typeString.IndexOf(StartArgument, indicatorIndex);
if (argumentsIndex >= 0)
{
throw new InvalidOperationException("Cannot construct an already-constructed type");
}
var arityString = typeString.Substring(indicatorIndex + 1);
var arity = int.Parse(arityString);
if (typeArguments.Length != arity)
{
throw new InvalidOperationException($"Insufficient number of type arguments, {typeArguments.Length}, provided while constructing type \"{unconstructed}\" of arity {arity}");
}
var typeSpecs = new TypeSpec[typeArguments.Length];
for (var i = 0; i < typeArguments.Length; i++)
{
typeSpecs[i] = RuntimeTypeNameParser.Parse(formatter.Format(typeArguments[i]));
}
var constructed = new ConstructedGenericTypeSpec(new NamedTypeSpec(null, typeString, typeArguments.Length), typeSpecs).Format();
return(constructed);
}
/// <summary>
/// Returns the constructed form of the provided generic type.
/// </summary>
public static IdSpan GetConstructed(this TypeConverter formatter, IdSpan unconstructed, params Type[] typeArguments)
{
var typeString = unconstructed.AsSpan();
var indicatorIndex = typeString.IndexOf((byte)GenericTypeIndicator);
var arityString = typeString.Slice(indicatorIndex + 1);
if (indicatorIndex < 0 || arityString.IndexOf((byte)StartArgument) >= 0)
{
throw new InvalidOperationException("Cannot construct an already-constructed type");
}
if (!Utf8Parser.TryParse(arityString, out int arity, out var len) || len < arityString.Length || typeArguments.Length != arity)
{
throw new InvalidOperationException($"Insufficient number of type arguments, {typeArguments.Length}, provided while constructing type \"{unconstructed}\"");
}
var typeSpecs = new TypeSpec[typeArguments.Length];
for (var i = 0; i < typeArguments.Length; i++)
{
typeSpecs[i] = RuntimeTypeNameParser.Parse(formatter.Format(typeArguments[i]));
}
var constructed = new ConstructedGenericTypeSpec(new NamedTypeSpec(null, unconstructed.ToStringUtf8(), typeArguments.Length), typeSpecs).Format();
return(IdSpan.Create(constructed));
}
