gdb/unittests/optional/in_place.cc

   1 // Copyright (C) 2013-2021 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 static void
  21 test ()
  22 {
  23   // [20.5.5] In-place construction
  24   {
  25     gdb::optional<int> o { gdb::in_place };
  26     VERIFY( o );
  27     VERIFY( *o == int() );
  28
  29 #ifndef GDB_OPTIONAL
  30     static_assert( !std::is_convertible<gdb::in_place_t, gdb::optional<int>>(), "" );
  31 #endif
  32   }
  33
  34   {
  35     gdb::optional<int> o { gdb::in_place, 42 };
  36     VERIFY( o );
  37     VERIFY( *o == 42 );
  38   }
  39
  40   {
  41     gdb::optional<std::vector<int>> o { gdb::in_place, 18, 4 };
  42     VERIFY( o );
  43     VERIFY( o->size() == 18 );
  44     VERIFY( (*o)[17] == 4 );
  45   }
  46
  47 #ifndef GDB_OPTIONAL
  48   {
  49     gdb::optional<std::vector<int>> o { gdb::in_place, { 18, 4 } };
  50     VERIFY( o );
  51     VERIFY( o->size() == 2 );
  52     VERIFY( (*o)[0] == 18 );
  53   }
  54 #endif
  55
  56 #ifndef GDB_OPTIONAL
  57   {
  58     gdb::optional<std::vector<int>> o { gdb::in_place, { 18, 4 }, std::allocator<int> {} };
  59     VERIFY( o );
  60     VERIFY( o->size() == 2 );
  61     VERIFY( (*o)[0] == 18 );
  62   }
  63 #endif
  64 }
  65
  66 } // namespace in_place