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| author | Jonathan Wakely <jwakely@redhat.com> | 2022-03-23 09:57:20 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-03-23 12:17:16 +0000 |
| commit | 4894d69a1f37d54b6a612e58053db477ff5ba832 (patch) | |
| tree | c28015e1136893a110e0ef71075f312d8957209a /gcc | |
| parent | 018805e2791bafb40f8937d371d31325b037880d (diff) | |
| download | gcc-4894d69a1f37d54b6a612e58053db477ff5ba832.zip gcc-4894d69a1f37d54b6a612e58053db477ff5ba832.tar.gz gcc-4894d69a1f37d54b6a612e58053db477ff5ba832.tar.bz2 | |
libstdc++: Add missing constraints to std::bit_cast [PR105027]
Our std::bit_cast was relying on the compiler to check for errors inside
__builtin_bit_cast, instead of checking them as constraints. That means
std::bit_cast was not SFINAE-friendly.
This fix uses a requires-clause, so for old versions of Clang without
concepts support the function will still be unconstrained. At some point
in future we can remove the #ifdef __cpp_concepts check and rely on all
compilers having full concepts support in C++20 mode.
libstdc++-v3/ChangeLog:
PR libstdc++/105027
* include/std/bit (bit_cast): Add constraints.
* testsuite/26_numerics/bit/bit.cast/105027.cc: New test.
Diffstat (limited to 'gcc')
0 files changed, 0 insertions, 0 deletions