Method convert_to

ogsr_engine/Luabind/src/class_rep.cpp:1326–1402

}

void* luabind::detail::class_rep::convert_to(
	LUABIND_TYPE_INFO target_type
	, const object_rep* obj
	, void* target_memory) const
{
	// TODO: since this is a member function, we don't have to use the accesor functions for
	// the types and the extractor

	assert(obj == 0 || obj->crep() == this);

	int steps = 0;
	int offset = 0;
	if (!(LUABIND_TYPE_INFO_EQUAL(holder_type(), target_type))
		&& !(LUABIND_TYPE_INFO_EQUAL(const_holder_type(), target_type)))
	{
		steps = implicit_cast(this, target_type, offset);
	}

	// should never be called with a type that can't be cast
	assert((steps >= 0) && "internal error, please report");

	if (LUABIND_TYPE_INFO_EQUAL(target_type, holder_type()))
	{
		if (obj == 0)
		{
			// we are trying to convert nil to a holder type
			m_default_construct_holder(target_memory);
			return target_memory;
		}
		// if the type we are trying to convert to is the holder_type
		// it means that his crep has a holder_type (since it would have
		// been invalid otherwise, and T cannot be invalid). It also means
		// that we need no conversion, since the holder_type is what the
		// object points to.
		return obj->ptr();
	}

	if (LUABIND_TYPE_INFO_EQUAL(target_type, const_holder_type()))
	{
		if (obj == 0)
		{
			// we are trying to convert nil to a const holder type
			m_default_construct_const_holder(target_memory);
			return target_memory;
		}

		if (obj->flags() & object_rep::constant)
		{
			// we are holding a constant
			return obj->ptr();
		}
		else
		{
			// we are holding a non-constant, we need to convert it
			// to a const_holder.
			m_const_converter(obj->ptr(), target_memory);
			return target_memory;
		}