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| author | Boris Kolpackov <boris@codesynthesis.com> | 2019-05-25 15:05:58 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2019-05-25 15:05:58 +0200 |
| commit | ea995887962f1b4857feb4c0b9b5d12424ca3ff2 (patch) | |
| tree | ab8209ad4f758284089569c01fe6f26af2aac0c2 | |
| parent | f4de56f7023f1cc90bb2f1ba55db596beffb1a4f (diff) | |
Work around new is_unsigned_v VC 16.1 implementation in regex
| -rw-r--r-- | build2/test/script/regex.hxx | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/build2/test/script/regex.hxx b/build2/test/script/regex.hxx index e7969dc..ec02b18 100644 --- a/build2/test/script/regex.hxx +++ b/build2/test/script/regex.hxx @@ -615,11 +615,23 @@ namespace std // msvcrt assumes regex_traits<line_char>::_Uelem to be present (see above) // and statically asserts it is unsigned. // + // And starting from VC 16.1, is_unsigned_v is not implemented in terms of + // is_unsigned so we have to get deeper into the implementation details. + // +#if defined(_MSC_VER) && _MSC_VER >= 1921 + template <class _Ty> + struct _Sign_base<_Ty, false> + { + static constexpr bool _Signed = false; + static constexpr bool _Unsigned = true; + }; +#else template <> struct is_unsigned<build2::test::script::regex::line_char> { static const bool value = true; }; +#endif // When used with libc++ the linker complains that it can't find // __match_any_but_newline<line_char>::__exec() function. The problem is |