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

   1 // Copyright (C) 2015-2020 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-do run { target c++14 } }
  19
  20 #include <experimental/buffer>
  21 #include <testsuite_hooks.h>
  22
  23 using std::experimental::net::const_buffer;
  24 using std::experimental::net::mutable_buffer;
  25
  26 void
  27 test01()
  28 {
  29   using B = const_buffer;
  30   const B b;
  31
  32   static_assert( std::is_nothrow_default_constructible<B>::value,
  33       "const_mutable is nothrow default constructible" );
  34   static_assert( std::is_copy_assignable<B>::value,
  35       "const_mutable is copy assignable" );
  36   static_assert( std::is_nothrow_constructible<B, const void*, size_t>::value,
  37       "const_mutable is nothrow constructible from pointer and length" );
  38   static_assert( std::is_nothrow_constructible<B, mutable_buffer>::value,
  39       "const_mutable is nothrow constructible from mutable_buffer" );
  40   static_assert( std::is_same<decltype(b.data()), const void*>::value,
  41       "data() return const void*" );
  42   static_assert( noexcept(b.data()),
  43       "data() is nothrow" );
  44   static_assert( std::is_same<decltype(b.size()), size_t>::value,
  45       "size() return size_t" );
  46   static_assert( noexcept(b.size()),
  47       "size() is nothrow" );
  48 }
  49
  50 void
  51 test02()
  52 {
  53   bool test __attribute__((unused)) = false;
  54   char c[4];
  55
  56   const_buffer b;
  57   VERIFY( b.data() == nullptr );
  58   VERIFY( b.size() == 0 );
  59
  60   b = const_buffer(c, sizeof(c));
  61   VERIFY( b.data() == c );
  62   VERIFY( b.size() == sizeof(c) );
  63
  64   b = const_buffer{};
  65   VERIFY( b.data() == nullptr );
  66   VERIFY( b.size() == 0 );
  67 }
  68
  69 int
  70 main()
  71 {
  72   test01();
  73   test02();
  74 }