libstdc++-v3/testsuite/experimental/net/execution_context/use_service.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/executor>
  21 #include <testsuite_hooks.h>
  22
  23 using std::experimental::net::execution_context;
  24 using std::experimental::net::use_service;
  25
  26 struct service1 : execution_context::service
  27 {
  28   using key_type = service1;
  29   service1(execution_context& c) : service(c) { }
  30   void shutdown() noexcept { }
  31 };
  32
  33 struct key2 : execution_context::service
  34 {
  35   key2(execution_context& c) : service(c) { }
  36 };
  37
  38 struct service2 : key2
  39 {
  40   using key_type = key2;
  41   service2(execution_context& c) : key2(c) { }
  42   void shutdown() noexcept { }
  43 };
  44
  45 struct service3 : service1
  46 {
  47   using service1::service1;
  48 };
  49
  50 struct service4 : service2
  51 {
  52   using service2::service2;
  53 };
  54
  55 void
  56 test01()
  57 {
  58   execution_context ctx;
  59   service1& svc1 = use_service<service1>(ctx);
  60   service1& svc1a = use_service<service1>(ctx);
  61   VERIFY( &svc1a == &svc1 );
  62
  63   key2& svc2 = use_service<service2>(ctx);
  64   key2& svc2a = use_service<service2>(ctx);
  65   VERIFY( &svc2a == &svc2 );
  66
  67   service1& svc3 = use_service<service3>(ctx);
  68   VERIFY( &svc3 == &svc1 );
  69
  70   key2& svc4 = use_service<service4>(ctx);
  71   VERIFY( &svc4 == &svc2 );
  72
  73   // TODO test02() function that puts derived types in first, then tests base comes out
  74 }
  75
  76 int
  77 main()
  78 {
  79   test01();
  80 }