[Bug libstdc++/70483] string_view::compare and coparision operators are not constexpr

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70483

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Sep 12 16:27:14 2017
New Revision: 252032

URL: https://gcc.gnu.org/viewcvs?rev=252032&root=gcc&view=rev
Log:
PR libstdc++/70483 make std::experimental::string_view fully constexpr

Backport from mainline
2017-09-12  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/70483
        * include/experimental/bits/string_view.tcc (basic_string_view::find)
        (basic_string_view::rfind, basic_string_view::find_first_of)
        (basic_string_view::find_last_of, basic_string_view::find_first_not_of)
        (basic_string_view::find_last_not_of): Add constexpr specifier.
        * include/experimental/string_view (basic_string_view::remove_prefix)
        (basic_string_view::remove_suffix, basic_string_view::swap)
        (basic_string_view::compare, basic_string_view::find)
        (basic_string_view::rfind, basic_string_view::find_first_of)
        (basic_string_view::find_last_of, basic_string_view::find_first_not_of)
        (basic_string_view::find_last_not_of, operator==, operator!=)
        (operator<, operator>, operator<=, operator>=): Likewise.
        * testsuite/experimental/string_view/operations/compare/char/70483.cc:
        New.

Added:
   
branches/gcc-7-branch/libstdc++-v3/testsuite/experimental/string_view/operations/compare/char/70483.cc
Modified:
    branches/gcc-7-branch/libstdc++-v3/ChangeLog
   
branches/gcc-7-branch/libstdc++-v3/include/experimental/bits/string_view.tcc
    branches/gcc-7-branch/libstdc++-v3/include/experimental/string_view