libstdc++-v3/testsuite/20_util/to_chars/chars_format.cc

   1 // Copyright (C) 2019-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do compile { target c++17 } }
  19
  20 #include <charconv>
  21
  22 // C++17 23.2.1 [utility.syn]
  23 // chars_format is a bitmask type with elements scientific, fixed and hex
  24
  25 using F = std::chars_format;
  26 const F none = F{};
  27 const F all = ~none;
  28 static_assert(std::is_enum_v<F>);
  29 static_assert((F::scientific & F::fixed) == none);
  30 static_assert((F::scientific & F::hex) == none);
  31 static_assert((F::fixed & F::hex) == none);
  32 static_assert(F::general == (F::fixed | F::scientific));
  33 static_assert(F::general == (F::fixed ^ F::scientific));
  34
  35 // sanity check operators
  36 static_assert((F::scientific & F::scientific) == F::scientific);
  37 static_assert((F::fixed & F::fixed) == F::fixed);
  38 static_assert((F::hex & F::hex) == F::hex);
  39 static_assert((F::general & F::general) == F::general);
  40 static_assert((F::scientific | F::scientific) == F::scientific);
  41 static_assert((F::fixed | F::fixed) == F::fixed);
  42 static_assert((F::hex | F::hex) == F::hex);
  43 static_assert((F::general | F::general) == F::general);
  44 static_assert((F::scientific ^ F::scientific) == none);
  45 static_assert((F::fixed ^ F::fixed) == none);
  46 static_assert((F::hex ^ F::hex) == none);
  47 static_assert((F::general ^ F::general) == none);
  48 static_assert((F::fixed & all) == F::fixed);
  49 static_assert((F::hex & all) == F::hex);
  50 static_assert((F::general & all) == F::general);
  51 static_assert(~all == none);