libstdc++-v3/testsuite/20_util/from_chars/1_c++20_neg.cc

   1 // Copyright (C) 2017-2020 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-options "-std=gnu++2a" }
  19 // { dg-do compile { target c++2a } }
  20
  21 #include <charconv>
  22
  23 void
  24 test01(const char* first, const char* last)
  25 {
  26   wchar_t wc;
  27   std::from_chars(first, last, wc); // { dg-error "no matching" }
  28   std::from_chars(first, last, wc, 10); // { dg-error "no matching" }
  29   char8_t c8;
  30   std::from_chars(first, last, c8); // { dg-error "no matching" }
  31   std::from_chars(first, last, c8, 10); // { dg-error "no matching" }
  32   char16_t c16;
  33   std::from_chars(first, last, c16); // { dg-error "no matching" }
  34   std::from_chars(first, last, c16, 10); // { dg-error "no matching" }
  35   char32_t c32;
  36   std::from_chars(first, last, c32); // { dg-error "no matching" }
  37   std::from_chars(first, last, c32, 10); // { dg-error "no matching" }
  38   enum E { } e;
  39   std::from_chars(first, last, e); // { dg-error "no matching" }
  40   std::from_chars(first, last, e, 10); // { dg-error "no matching" }
  41 }
  42
  43 // { dg-prune-output "enable_if" }
  44 // { dg-prune-output "cannot bind non-const lvalue reference" }