On Wed, Nov 24, 2021 at 1:41 AM Alvaro Herrera <alvhe...@alvh.no-ip.org> wrote: > > On 2021-Nov-23, Juan José Santamaría Flecha wrote: > > > On Tue, Nov 23, 2021 at 2:11 PM Daniel Gustafsson <dan...@yesql.se> wrote: > > > > It's supported in clang as well per the documentation [0] in at least some > > > configurations or distributions: > > > [[maybe_unused]] is also recognized from Visual Studio 2017 onwards [1]. > > > > [1] https://docs.microsoft.com/en-us/cpp/cpp/attributes?view=msvc-170 > > Right ... the problem, as I understand, is that the syntax for > [[maybe_unused]] is different from what we can do with the current > pg_attribute_unused -- [[maybe_unused]] goes before the variable name. > We would need to define pg_attribute_unused macro (maybe have it take > the variable name and initializator value as arguments?), and also > define PG_USED_FOR_ASSERTS_ONLY in the same style. >
Isn't "[[maybe_unused]]" only supported for MS C++ (not C)? I'm using Visual Studio 17, and I get nothing but a syntax error if trying to use it in C code, whereas it works if I rename the same source file to have a ".cpp" extension (but even then I need to use the "/std:c++17" compiler flag) Regards, Greg Nancarrow Fujitsu Australia
