private static Type CalculateAssociatedSystemType(CType src)
{
Type result = null;
switch (src.GetTypeKind())
{
case TypeKind.TK_ArrayType:
ArrayType a = (ArrayType)src;
Type elementType = a.GetElementType().AssociatedSystemType;
result = a.IsSZArray ? elementType.MakeArrayType() : elementType.MakeArrayType(a.rank);
break;
case TypeKind.TK_NullableType:
NullableType n = (NullableType)src;
Type underlyingType = n.GetUnderlyingType().AssociatedSystemType;
result = typeof(Nullable <>).MakeGenericType(underlyingType);
break;
case TypeKind.TK_PointerType:
PointerType p = (PointerType)src;
Type referentType = p.GetReferentType().AssociatedSystemType;
result = referentType.MakePointerType();
break;
case TypeKind.TK_ParameterModifierType:
ParameterModifierType r = (ParameterModifierType)src;
Type parameterType = r.GetParameterType().AssociatedSystemType;
result = parameterType.MakeByRefType();
break;
case TypeKind.TK_AggregateType:
result = CalculateAssociatedSystemTypeForAggregate((AggregateType)src);
break;
case TypeKind.TK_TypeParameterType:
TypeParameterType t = (TypeParameterType)src;
if (t.IsMethodTypeParameter())
{
MethodInfo meth = ((MethodSymbol)t.GetOwningSymbol()).AssociatedMemberInfo as MethodInfo;
result = meth.GetGenericArguments()[t.GetIndexInOwnParameters()];
}
else
{
Type parentType = ((AggregateSymbol)t.GetOwningSymbol()).AssociatedSystemType;
result = parentType.GetGenericArguments()[t.GetIndexInOwnParameters()];
}
break;
}
Debug.Assert(result != null || src.GetTypeKind() == TypeKind.TK_AggregateType);
return(result);
}
private static Type CalculateAssociatedSystemType(CType src)
{
Type result = null;
switch (src.GetTypeKind())
{
case TypeKind.TK_ArrayType:
ArrayType a = src.AsArrayType();
Type elementType = a.GetElementType().AssociatedSystemType;
if (a.rank == 1)
{
result = elementType.MakeArrayType();
}
else
{
result = elementType.MakeArrayType(a.rank);
}
break;
case TypeKind.TK_NullableType:
NullableType n = src.AsNullableType();
Type underlyingType = n.GetUnderlyingType().AssociatedSystemType;
result = typeof(Nullable <>).MakeGenericType(underlyingType);
break;
case TypeKind.TK_PointerType:
PointerType p = src.AsPointerType();
Type referentType = p.GetReferentType().AssociatedSystemType;
result = referentType.MakePointerType();
break;
case TypeKind.TK_ParameterModifierType:
ParameterModifierType r = src.AsParameterModifierType();
Type parameterType = r.GetParameterType().AssociatedSystemType;
result = parameterType.MakeByRefType();
break;
case TypeKind.TK_AggregateType:
result = CalculateAssociatedSystemTypeForAggregate(src.AsAggregateType());
break;
case TypeKind.TK_TypeParameterType:
TypeParameterType t = src.AsTypeParameterType();
Type parentType = null;
if (t.IsMethodTypeParameter())
{
MethodInfo meth = t.GetOwningSymbol().AsMethodSymbol().AssociatedMemberInfo as MethodInfo;
result = meth.GetGenericArguments()[t.GetIndexInOwnParameters()];
}
else
{
parentType = t.GetOwningSymbol().AsAggregateSymbol().AssociatedSystemType;
result = parentType.GetTypeInfo().GenericTypeParameters[t.GetIndexInOwnParameters()];
}
break;
case TypeKind.TK_ArgumentListType:
case TypeKind.TK_BoundLambdaType:
case TypeKind.TK_ErrorType:
case TypeKind.TK_MethodGroupType:
case TypeKind.TK_NaturalIntegerType:
case TypeKind.TK_NullType:
case TypeKind.TK_OpenTypePlaceholderType:
case TypeKind.TK_UnboundLambdaType:
case TypeKind.TK_VoidType:
default:
break;
}
Debug.Assert(result != null || src.GetTypeKind() == TypeKind.TK_AggregateType);
return(result);
}