protected internal unsafe override SwiftType GetSwiftType(Type attributedType, SwiftType []?typeArgs)
{
if (mangledName is null)
{
mangledName = SwiftType.Mangle(attributedType);
}
if (typeArgs is null)
{
return(new SwiftType(lib, mangledName, attributedType));
}
// If this is generic, then it might be a couple different things.
if (!mangledName.StartsWith("$s", StringComparison.Ordinal))
{
mangledName = "$s" + mangledName;
}
if (mangledName.EndsWith("MQ", StringComparison.Ordinal))
{
// opaque type
var args = stackalloc void * [typeArgs.Length];
for (var i = 0; i < typeArgs.Length; i++)
{
args [i] = typeArgs [i].Metadata;
}
return(new SwiftType(lib, SwiftCoreLib.GetOpaqueTypeMetadata(0, args, lib.RequireSymbol(mangledName), 0)));
}
else
{
// get type from metadata accessor function
if (!mangledName.EndsWith("Mp", StringComparison.Ordinal))
{
mangledName += "Ma";
}
var ftnPtr = lib.RequireSymbol(mangledName);
var args = new List <object> (typeArgs.Length * 2);
args.Add((long)0); // metadataReq arg
// determine how many additional arguments based on number of generic parameters and constraints
var tparams = attributedType.GetGenericTypeDefinition().GetGenericArguments();
for (var i = 0; i < typeArgs.Length; i++)
{
args.Add((IntPtr)typeArgs [i].Metadata);
// also add any constraints
var constraints = tparams [i].GetGenericParameterConstraints();
foreach (var constr in constraints)
{
var attr = constr.GetCustomAttribute <SwiftProtocolAttribute> (inherit: false);
if (attr != null)
{
args.Add((IntPtr)typeArgs [i].GetProtocolConformance(attr.Descriptor));
}
}
}
var del = MetadataReq.MakeDelegate(args.Count - 1, ftnPtr);
return(new SwiftType(lib, (IntPtr)del.DynamicInvoke(args.ToArray()), null, attributedType, typeArgs));
}
}
protected virtual ProtocolWitnessTable *CreateViewConformance()
{
viewConformanceDesc = (ViewProtocolConformanceDescriptor *)Marshal.AllocHGlobal(sizeof(ViewProtocolConformanceDescriptor));
// zero everything first
*viewConformanceDesc = default;
viewConformanceDesc->Populate(Metadata->TypeDescriptor);
var bodySwiftType = SwiftType.Of(BodyProperty.PropertyType) !;
var bodyConformance = bodySwiftType.GetProtocolConformance(SwiftUILib.ViewProtocol);
var witnessTable = SwiftCoreLib.GetProtocolWitnessTable(&viewConformanceDesc->ConformanceDescriptor, Metadata, null);
viewConformanceDesc->FixupAndRegister(
witnessTable,
bodyConformance,
bodySwiftType.Metadata,
SwiftGlueLib.BodyProtocolWitness);
return(witnessTable);
}
