3 Commits

Author	SHA1	Message	Date
Christopher Di Bella	e9ef45635b	[clang] adds unary type transformations as compiler built-ins ... Adds * `__add_lvalue_reference` * `__add_pointer` * `__add_rvalue_reference` * `__decay` * `__make_signed` * `__make_unsigned` * `__remove_all_extents` * `__remove_extent` * `__remove_const` * `__remove_volatile` * `__remove_cv` * `__remove_pointer` * `__remove_reference` * `__remove_cvref` These are all compiler built-in equivalents of the unary type traits found in [[meta.trans]][1]. The compiler already has all of the information it needs to answer these transformations, so we can skip needing to make partial specialisations in standard library implementations (we already do this for a lot of the query traits). This will hopefully improve compile times, as we won't need use as much memory in such a base part of the standard library. [1]: http://wg21.link/meta.trans Co-authored-by: zoecarver Reviewed By: aaron.ballman, rsmith Differential Revision: https://reviews.llvm.org/D116203	2022-08-22 03:03:32 +00:00
Nico Weber	aacf1a9742	Revert "[clang] adds unary type transformations as compiler built-ins" ... This reverts commit bc60cf2368. Doesn't build on Windows and breaks gcc 9 build, see https://reviews.llvm.org/D116203#3722094 and https://reviews.llvm.org/D116203#3722128 Also revert two follow-ups. One fixed a warning added in bc60cf2368, the other makes use of the feature added in bc60cf2368 in libc++: Revert "[libcxx][NFC] utilises compiler builtins for unary transform type-traits" This reverts commit 06a1d917ef. Revert "[Sema] Fix a warning" This reverts commit c85abbe879.	2022-08-14 15:58:21 -04:00
Christopher Di Bella	bc60cf2368	[clang] adds unary type transformations as compiler built-ins ... Adds * `__add_lvalue_reference` * `__add_pointer` * `__add_rvalue_reference` * `__decay` * `__make_signed` * `__make_unsigned` * `__remove_all_extents` * `__remove_extent` * `__remove_const` * `__remove_volatile` * `__remove_cv` * `__remove_pointer` * `__remove_reference` * `__remove_cvref` These are all compiler built-in equivalents of the unary type traits found in [[meta.trans]][1]. The compiler already has all of the information it needs to answer these transformations, so we can skip needing to make partial specialisations in standard library implementations (we already do this for a lot of the query traits). This will hopefully improve compile times, as we won't need use as much memory in such a base part of the standard library. [1]: http://wg21.link/meta.trans Co-authored-by: zoecarver Reviewed By: aaron.ballman, rsmith Differential Revision: https://reviews.llvm.org/D116203	2022-08-14 17:12:15 +00:00