gdb/unittests/optional/in_place.cc

   1 // Copyright (C) 2013-2019 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 namespace in_place {
  19
  20 void test()
  21 {
  22   // [20.5.5] In-place construction
  23   {
  24     gdb::optional<int> o { gdb::in_place };
  25     VERIFY( o );
  26     VERIFY( *o == int() );
  27
  28 #ifndef GDB_OPTIONAL
  29     static_assert( !std::is_convertible<gdb::in_place_t, gdb::optional<int>>(), "" );
  30 #endif
  31   }
  32
  33   {
  34     gdb::optional<int> o { gdb::in_place, 42 };
  35     VERIFY( o );
  36     VERIFY( *o == 42 );
  37   }
  38
  39   {
  40     gdb::optional<std::vector<int>> o { gdb::in_place, 18, 4 };
  41     VERIFY( o );
  42     VERIFY( o->size() == 18 );
  43     VERIFY( (*o)[17] == 4 );
  44   }
  45
  46 #ifndef GDB_OPTIONAL
  47   {
  48     gdb::optional<std::vector<int>> o { gdb::in_place, { 18, 4 } };
  49     VERIFY( o );
  50     VERIFY( o->size() == 2 );
  51     VERIFY( (*o)[0] == 18 );
  52   }
  53 #endif
  54
  55 #ifndef GDB_OPTIONAL
  56   {
  57     gdb::optional<std::vector<int>> o { gdb::in_place, { 18, 4 }, std::allocator<int> {} };
  58     VERIFY( o );
  59     VERIFY( o->size() == 2 );
  60     VERIFY( (*o)[0] == 18 );
  61   }
  62 #endif
  63 }
  64
  65 } // namespace in_place