https://gcc.gnu.org/g:94990be76a3230a1e19411d3aaa480c043d01172
commit r16-7715-g94990be76a3230a1e19411d3aaa480c043d01172 Author: Marek Polacek <[email protected]> Date: Tue Feb 24 13:38:48 2026 -0500 c++/reflection: members_of and cv-qual class types [PR124215] Here when asking for the members of "^^Test const" we found nothing. The reason is that members_of_representable_p checks whether CP_DECL_CONTEXT != c, but if c is a type, it doesn't look at its TYPE_MAIN_VARIANT. Fixed as per Jakub's suggestion in the PR. PR c++/124215 gcc/cp/ChangeLog: * reflect.cc (class_members_of): Use TYPE_MAIN_VARIANT of R. gcc/testsuite/ChangeLog: * g++.dg/reflect/members_of9.C: New test. Co-authored-by: Jakub Jelinek <[email protected]> Reviewed-by: Jason Merrill <[email protected]> Diff: --- gcc/cp/reflect.cc | 1 + gcc/testsuite/g++.dg/reflect/members_of9.C | 17 +++++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/gcc/cp/reflect.cc b/gcc/cp/reflect.cc index 3c82251f511b..871d52a55b11 100644 --- a/gcc/cp/reflect.cc +++ b/gcc/cp/reflect.cc @@ -6557,6 +6557,7 @@ class_members_of (location_t loc, const constexpr_ctx *ctx, tree r, tree actx, tree call, bool *non_constant_p, tree *jump_target, enum metafn_code kind, tree fun) { + r = TYPE_MAIN_VARIANT (r); if (kind == METAFN_MEMBERS_OF) { if (modules_p ()) diff --git a/gcc/testsuite/g++.dg/reflect/members_of9.C b/gcc/testsuite/g++.dg/reflect/members_of9.C new file mode 100644 index 000000000000..9d07182953b5 --- /dev/null +++ b/gcc/testsuite/g++.dg/reflect/members_of9.C @@ -0,0 +1,17 @@ +// PR c++/124215 +// { dg-do compile { target c++26 } } +// { dg-additional-options "-freflection" } + +#include <meta> + +struct Test { + int a; + char b; +}; + +consteval auto number_of_members(std::meta::info ty) -> size_t { + return nonstatic_data_members_of(ty, std::meta::access_context::current()).size(); +} + +static_assert(number_of_members(^^Test) == 2); +static_assert(number_of_members(^^Test const) == 2);
