libstdc++-v3/testsuite/experimental/net/buffer/mutable.cc

   1 // Copyright (C) 2015-2022 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 run { target c++14 } }
  19
  20 #include <experimental/buffer>
  21 #include <testsuite_hooks.h>
  22
  23 using std::experimental::net::mutable_buffer;
  24
  25 void
  26 test01()
  27 {
  28   using B = mutable_buffer;
  29   const B b;
  30
  31   static_assert( std::is_nothrow_default_constructible<B>::value,
  32       "const_mutable is nothrow default constructible" );
  33   static_assert( std::is_copy_assignable<B>::value,
  34       "const_mutable is copy assignable" );
  35   static_assert( std::is_nothrow_constructible<B, void*, size_t>::value,
  36       "const_mutable is nothrow default constructible" );
  37   static_assert( std::is_same<decltype(b.data()), void*>::value,
  38       "data() return const void*" );
  39   static_assert( noexcept(b.data()),
  40       "data() is nothrow" );
  41   static_assert( std::is_same<decltype(b.size()), size_t>::value,
  42       "size() return size_t" );
  43   static_assert( noexcept(b.size()),
  44       "size() is nothrow" );
  45 }
  46
  47 void
  48 test02()
  49 {
  50   bool test __attribute__((unused)) = false;
  51   char c[4];
  52
  53   mutable_buffer b;
  54   VERIFY( b.data() == nullptr );
  55   VERIFY( b.size() == 0 );
  56
  57   b = mutable_buffer(c, sizeof(c));
  58   VERIFY( b.data() == c );
  59   VERIFY( b.size() == sizeof(c) );
  60
  61   b = mutable_buffer{};
  62   VERIFY( b.data() == nullptr );
  63   VERIFY( b.size() == 0 );
  64 }
  65
  66 int
  67 main()
  68 {
  69   test01();
  70   test02();
  71 }