386fd16c55
Because __int128 can be used as the difference type for iota_view, we need to ensure that it meets the requirements of an integer-class type. The requirements in [iterator.concept.winc] p10 include numeric_limits being specialized and giving meaningful answers. Currently we only specialize numeric_limits for non-standard integer types in non-strict modes. However, nothing prevents us from defining an explicit specialization for any implementation-defined type, so it doesn't matter whether std::is_integral<__int128> is true or not. This patch ensures that the numeric_limits specializations for signed and unsigned __int128 are defined whenever __int128 is available. It also makes the __numeric_traits and __int_limits helpers work for __int128, via a new __gnu_cxx::__is_integer_nonstrict trait. libstdc++-v3/ChangeLog: PR libstdc++/96042 * include/ext/numeric_traits.h (__is_integer_nonstrict): New trait which is true for 128-bit integers even in strict modes. (__numeric_traits_integer, __numeric_traits): Use __is_integer_nonstrict instead of __is_integer. * include/std/limits [__STRICT_ANSI__ && __SIZEOF_INT128__] (numeric_limits<__int128>, (numeric_limits<unsigned __int128>): Define. * testsuite/std/ranges/iota/96042.cc: New test. |
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| config | ||
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README
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.