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interrogate: support implicit typecast operators in some cases

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For example, this will let us pass a ConfigVariableFilename to anything that accepts a Filename, just like in C++.

Does not work if the return value if the typecast operator requires management.
This commit is contained in:
rdb 2018-08-19 16:06:16 +02:00
parent 21f5e77467
commit c4b657b5b2
1 changed files with 21 additions and 0 deletions
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21
dtool/src/interrogate/interfaceMakerPythonNative.cxx
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@ -1089,6 +1089,27 @@ write_class_details(ostream &out, Object *obj) {
}
}
// Are there any implicit cast operators that can cast this object to our
// desired pointer?
for (Function *func : obj->_methods) {
for (FunctionRemap *remap : func->_remaps) {
if (remap->_type == FunctionRemap::T_typecast_method &&
is_remap_legal(remap) &&
!remap->_return_type->return_value_needs_management() &&
(remap->_cppfunc->_storage_class & CPPInstance::SC_explicit) == 0 &&
TypeManager::is_pointer(remap->_return_type->get_new_type())) {
CPPType *cast_type = remap->_return_type->get_orig_type();
CPPType *obj_type = TypeManager::unwrap(TypeManager::resolve_type(remap->_return_type->get_new_type()));
string return_expr = "(" + cast_type->get_local_name(&parser) + ")*local_this";
out << " // " << *remap->_cppfunc << "\n";
out << " if (requested_type == Dtool_Ptr_" << make_safe_name(obj_type->get_local_name(&parser)) << ") {\n";
out << " return (void *)(" << remap->_return_type->get_return_expr(return_expr) << ");\n";
out << " }\n";
}
}
}
out << " return nullptr;\n";
out << "}\n\n";