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The bitwise operators for combining bitmask types such as std::launch are not consistently annotated with noexcept, constexpr, and nodiscard. This is the subject of LWG 3977, although the proposed resolution doesn't work. We can make the changes in libstdc++ anyway though. libstdc++-v3/ChangeLog: * include/bits/atomic_base.h (operator|, operator&): Add noexcept. * include/bits/fs_fwd.h (operator&, operator|, operator^) (operator~): Add nodiscard to overloads for copy_options, perms, perm_options, and directory_options. * include/bits/ios_base.h (operator&, operator|, operator^) (operator~): Add nodiscard and noexcept to overloads for _Ios_Fmtflags, _Ios_Openmode, and _Ios_Iostate. (operator|=, operator&=, operator^=): Add constexpr for C++14. * include/bits/regex_constants.h (operator&, operator|, operator^) (operator~): Add nodiscard and noexcept to overloads for syntax_option_type and match_flag_type. (operator|=, operator&=, operator^=): Add noexcept. * include/std/charconv (operator&, operator|, operator^) (operator~): Add nodiscard to overloads for chars_format. * include/std/future (operator&, operator|, operator^) (operator~): Add nodiscard for overloads for launch. (operator&=, operator|=, operator^=): Add constexpr for C++14. * include/experimental/bits/fs_fwd.h (operator&, operator|) (operator^, operator~): Add nodiscard to overloads for copy_options, perms, and directory_options. * testsuite/27_io/ios_base/types/fmtflags/bitmask_operators.cc: Add dg-warning for nodiscard warnings. * testsuite/27_io/ios_base/types/iostate/bitmask_operators.cc: Likewise. * testsuite/27_io/ios_base/types/openmode/bitmask_operators.cc: Likewise. * testsuite/27_io/filesystem/operations/bitmask_types.cc: New test. |
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| .. | ||
| config | ||
| doc | ||
| include | ||
| libsupc++ | ||
| po | ||
| python | ||
| scripts | ||
| src | ||
| testsuite | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| ChangeLog | ||
| ChangeLog-1998 | ||
| ChangeLog-1999 | ||
| ChangeLog-2000 | ||
| ChangeLog-2001 | ||
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| ChangeLog-2003 | ||
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| ChangeLog-2012 | ||
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| ChangeLog-2016 | ||
| ChangeLog-2017 | ||
| ChangeLog-2018 | ||
| ChangeLog-2019 | ||
| ChangeLog-2020 | ||
| ChangeLog-2021 | ||
| ChangeLog-2022 | ||
| ChangeLog-2023 | ||
| config.h.in | ||
| configure | ||
| configure.ac | ||
| configure.host | ||
| crossconfig.m4 | ||
| fragment.am | ||
| linkage.m4 | ||
| Makefile.am | ||
| Makefile.in | ||
| README | ||
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.