Ok, as far as I can tell this is the missing functionality in 10 that would be necessary to implement fetching names of fields of aggregations: https://gcc.gnu.org/projects/cxx-status.html Inconsistencies with non-type template parameters P1907R1 10 (no floating point, union, or subobject template args) 11 (complete) __cpp_nontype_template_args >= 201911 The subobject template args as template argument is needed. Anyways, thanks everyone! ________________________________ From: Hans Åberg <haberg_1@xxxxxxxxxx> Sent: Thursday, October 24, 2024 8:03 AM To: Florian Weimer <fweimer@xxxxxxxxxx> Cc: Phil Phil via Gcc-help <gcc-help@xxxxxxxxxxx>; paul@xxxxxxxxxxxxxxxxx <paul@xxxxxxxxxxxxxxxxx>; Phil Phil <heidegg@xxxxxxxxxxx> Subject: Re: Gcc 94 / 10.2 has no GCC 20 ? It may be useful to check lists over the C++ features supported, such as those given below. Certain C++ features may take a long time to get implemented, or not at all, even though the compiler has an option for the language version. It also depends on the compiler: Despite GCC and Clang being close, they may differ in the C++ features supported. Compiler specific workarounds may have to be applied. https://en.cppreference.com/w/cpp/compiler_support/20 https://en.cppreference.com/w/cpp/compiler_support > On 24 Oct 2024, at 08:19, Florian Weimer via Gcc-help <gcc-help@xxxxxxxxxxx> wrote: > > * Phil Phil via Gcc-help: > >> whatever. 11 should be safe? > > C++20 support is still experimental in GCC 11 (or any GCC release so > far). Unless you are experimenting, you should not use it. > > Thanks, > Florian >
