GCC modified for the FreeChainXenon project
f471cb71c8
This also implements the proposed resolutions of the tentatively ready LWG issues 3760, 3761 and 3801 for cartesian_product_view. I'm not sure how/if we should implement the recommended practice of: iterator::difference_type should be the smallest signed-integer-like type that is sufficiently wide to store the product of the maximum sizes of all underlying ranges if such a type exists because for e.g. extern std::vector<int> x, y; auto v = views::cartesian_product(x, y); IIUC it'd mean difference_type should be __int128 (on 64-bit systems), which seems quite wasteful: in practice the size of any cartesian product probably won't exceed the precision of say ptrdiff_t, and using anything larger will just incur unnecessary space/time overhead. It's also probably not worth the complexity to use less precision than ptrdiff_t (when possible) either. So this patch defines difference_type as common_type_t<ptrdiff_t, range_difference_t<_First>, range_difference_t<_Vs>...> which should mean it's least as large as the difference_type of each underlying range, and at least as large as ptrdiff_t. This patch also adds assertions to catch any overflow that occurs due to this choice of difference_type. libstdc++-v3/ChangeLog: * include/std/ranges (__maybe_const_t): New alias for __detail::__maybe_const_t. (__detail::__cartesian_product_is_random_access): Define. (__detail::__cartesian_product_common_arg): Define. (__detail::__cartesian_product_is_bidirectional): Define. (__detail::__cartesian_product_is_common): Define. (__detail::__cartesian_product_is_sized): Define. (__detail::__cartesian_is_sized_sentinel): Define. (__detail::__cartesian_common_arg_end): Define. (cartesian_product_view): Define. (cartesian_product_view::_Iterator): Define. (views::__detail::__can_cartesian_product_view): Define. (views::_CartesianProduct, views::cartesian_product): Define. * testsuite/std/ranges/cartesian_product/1.cc: New test. |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
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