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| author | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2024-12-20 12:09:10 +0000 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2025-01-08 12:45:38 +0000 |
| commit | 5db068738469be8c2bf3cfbda4c54725bd9fe228 (patch) | |
| tree | f65453eaf6ddcf859ea8aa05a1f54d59bfc2c6cf /gcc | |
| parent | cbef2c1dbd0a609f68862c0a9aa9bf80a502411e (diff) | |
| download | gcc-5db068738469be8c2bf3cfbda4c54725bd9fe228.zip gcc-5db068738469be8c2bf3cfbda4c54725bd9fe228.tar.gz gcc-5db068738469be8c2bf3cfbda4c54725bd9fe228.tar.bz2 | |
libstdc++: add initializer_list constructor to std::span (P2447R6)
This commit implements P2447R6. The code is straightforward (just one
extra constructor, with constraints and conditional explicit).
I decided to suppress -Winit-list-lifetime because otherwise it would
give too many false positives. The new constructor is meant to be used
as a parameter-passing interface (this is a design choice, see
P2447R6/ยง2) and, as such, the initializer_list won't dangle despite
GCC's warnings.
The new constructor isn't 100% backwards compatible. A couple of
examples are included in Annex C, but I have also lifted some more
from R4. A new test checks for the old and the new behaviors.
libstdc++-v3/ChangeLog:
* include/bits/version.def: Add the new feature-testing macro.
* include/bits/version.h: Regenerate.
* include/std/span: Add constructor from initializer_list.
* testsuite/23_containers/span/init_list_cons.cc: New test.
* testsuite/23_containers/span/init_list_cons_neg.cc: New test.
Signed-off-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Diffstat (limited to 'gcc')
0 files changed, 0 insertions, 0 deletions