https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124215
Bug ID: 124215
Summary: [reflection] const pointer type can't find member list
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zlin174 at bloomberg dot net
Target Milestone: ---
the exact version of GCC: GCC trunk
the system type: x86_64 Linux
the options given when GCC was configured/built: GCC trunk
the complete command line that triggers the bug: -freflection -std=c++26
the compiler output (error messages, warnings, etc.): nonstatic_data_members_of
on const pointer type is empty
In the following code snippet, no output under const type (while non-const type
has expected output):
```
#include <meta>
#include <string>
#include <iostream>
struct Test {
int a;
char b;
};
template <typename T>
void populate_raw_message([[maybe_unused]] T *msg)
{
using NonConstT = std::remove_cv_t<T>;
constexpr auto access = std::meta::access_context::current();
std::cout << "Reflection on const type:" << std::endl;
template for (constexpr std::meta::info member :
define_static_array(std::meta::nonstatic_data_members_of(^^T, access)))
{
std::cout << std::string(std::meta::identifier_of(member)) <<
std::endl;
}
std::cout << "Reflection on non-const type:" << std::endl;
template for (constexpr std::meta::info member :
define_static_array(std::meta::nonstatic_data_members_of(^^NonConstT, access)))
{
std::cout << std::string(std::meta::identifier_of(member)) <<
std::endl;
}
}
int main(){
const Test t(10, 'a');
populate_raw_message(&t);
}
```
Here is a compiler explorer link to show different output between Clang and
GCC:
https://godbolt.org/z/Tebn7dEvj
