(TypeMirror type, bool containsGenericParameters) Create(DmdType type)
{
if ((object)type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (typeCache.TryGetType(type, out var cachedType))
{
return(cachedType, false);
}
if (recursionCounter++ > 100)
{
throw new InvalidOperationException();
}
(TypeMirror type, bool containsGenericParameters)result;
bool addType = true;
switch (type.TypeSignatureKind)
{
case DmdTypeSignatureKind.Type:
if (!engine.TryGetMonoModule(type.Module.GetDebuggerModule() ?? throw new InvalidOperationException(), out var monoModule))
{
throw new InvalidOperationException();
}
Debug.Assert((type.MetadataToken >> 24) == 0x02);
//TODO: This can sometimes crash Unity's old mono fork
//TODO: It's possible to resolve types, but it's an internal method and it requires a method in the module
result = (monoModule.Assembly.GetType(type.FullName, false, false), false);
if (result.type == null)
{
throw new InvalidOperationException();
}
if (result.type.MetadataToken != type.MetadataToken)
{
throw new InvalidOperationException();
}
break;
case DmdTypeSignatureKind.Pointer:
result = Create(type.GetElementType());
result = (TryResolveType(result.type, type), result.containsGenericParameters);
if (result.type == null)
{
throw new InvalidOperationException();
}
if (!result.type.IsPointer)
{
throw new InvalidOperationException();
}
break;
case DmdTypeSignatureKind.ByRef:
result = Create(type.GetElementType());
result = (TryResolveType(result.type, type), result.containsGenericParameters);
if (result.type == null)
{
throw new InvalidOperationException();
}
// This currently always fails
//TODO: We could func-eval MakeByRefType()
if (!result.type.IsByRef)
{
throw new InvalidOperationException();
}
break;
case DmdTypeSignatureKind.TypeGenericParameter:
case DmdTypeSignatureKind.MethodGenericParameter:
result = (Create(type.AppDomain.System_Object).type, true);
addType = false;
break;
case DmdTypeSignatureKind.SZArray:
result = Create(type.GetElementType());
result = (TryResolveType(result.type, type), result.containsGenericParameters);
if (result.type == null)
{
throw new InvalidOperationException();
}
if (!result.type.IsArray || result.type.GetArrayRank() != 1 || !result.type.FullName.EndsWith("[]", StringComparison.Ordinal))
{
throw new InvalidOperationException();
}
break;
case DmdTypeSignatureKind.MDArray:
result = Create(type.GetElementType());
result = (TryResolveType(result.type, type), result.containsGenericParameters);
if (result.type == null)
{
throw new InvalidOperationException();
}
if (!result.type.IsArray || (result.type.GetArrayRank() == 1 && result.type.FullName.EndsWith("[]", StringComparison.Ordinal)))
{
throw new InvalidOperationException();
}
break;
case DmdTypeSignatureKind.GenericInstance:
result = Create(type.GetGenericTypeDefinition());
result = (TryResolveType(result.type, type), result.containsGenericParameters);
if (result.type == null)
{
throw new InvalidOperationException();
}
// This fails on Unity (version < 2.12), since it doesn't have that info available
//if (!result.type.IsGenericType)
// throw new InvalidOperationException();
break;
case DmdTypeSignatureKind.FunctionPointer:
// It's not possible to create function pointers, so use a pointer type instead
result = Create(type.AppDomain.System_Void.MakePointerType());
addType = false;
break;
default:
throw new InvalidOperationException();
}
if (result.type == null)
{
throw new InvalidOperationException();
}
if (addType && !result.containsGenericParameters)
{
typeCache.Add(result.type, type);
}
recursionCounter--;
return(result);
}
public EmitType(Type type)
{
Type = type;
TypeCache.Add(type, this);
}