libstdc++-v3/testsuite/28_regex/basic_regex/ctors/deduction.cc

   1 // Copyright (C) 2017-2019 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++17" }
  19 // { dg-do compile { target c++17 } }
  20
  21 #include <regex>
  22 #include <testsuite_iterators.h>
  23
  24 template<typename T, typename U> struct require_same;
  25 template<typename T> struct require_same<T, T> { using type = void; };
  26
  27 template<typename T, typename U>
  28   typename require_same<T, U>::type
  29   check_type(U&) { }
  30
  31 void
  32 test01()
  33 {
  34   std::basic_regex x("");
  35   check_type<std::basic_regex<char>>(x);
  36   char s[1] = {};
  37   std::basic_regex x2(s);
  38   check_type<std::basic_regex<char>>(x2);
  39   std::basic_regex x3(U"");
  40   check_type<std::basic_regex<char32_t>>(x3);
  41   std::basic_regex x4(U"", std::regex_constants::grep);
  42   check_type<std::basic_regex<char32_t>>(x4);
  43
  44   // Test explicit guide:
  45   std::basic_regex x5(s, s+1);
  46   check_type<std::basic_regex<char>>(x5);
  47   std::basic_regex x6((const char*)s, (const char*)s+1);
  48   check_type<std::basic_regex<char>>(x6);
  49   std::basic_regex x7(s, s+1, std::regex_constants::grep);
  50   check_type<std::basic_regex<char>>(x7);
  51   __gnu_test::test_container<char, __gnu_test::forward_iterator_wrapper> f(s);
  52   std::basic_regex x8(f.begin(), f.end());
  53   check_type<std::basic_regex<char>>(x8);
  54   std::basic_regex x9(f.begin(), f.end(), std::regex_constants::grep);
  55   check_type<std::basic_regex<char>>(x9);
  56
  57   std::basic_regex copy = x;
  58   check_type<std::basic_regex<char>>(copy);
  59   std::basic_regex move = std::move(x);
  60   check_type<std::basic_regex<char>>(move);
  61 }