libstdc++: Add default constructor to net::service_already_exists (PR 94199)
The service_already_exists exception type specified in the TS doesn't have any constructors defined. Since its base class isn't default constructible, that means has no usable constructors. This may be a defect in the TS. This patch fixes it by adding a default constructor, but making it private. The make_service function is declared as a friend to be able to call that private constructor. PR libstdc++/94199 * include/experimental/executor (service_already_exists): Add default constructor. Declare make_service to be a friend. * testsuite/experimental/net/execution_context/make_service.cc: New test.
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2020-03-16 Jonathan Wakely <jwakely@redhat.com>
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PR libstdc++/94199
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* include/experimental/executor (service_already_exists): Add default
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constructor. Declare make_service to be a friend.
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* testsuite/experimental/net/execution_context/make_service.cc: New
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test.
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2020-03-12 Jonathan Wakely <jwakely@redhat.com>
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* testsuite/tr1/8_c_compatibility/cstdlib/functions.cc: Do not pass
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@ -127,7 +127,14 @@ inline namespace v1
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/// An extensible, type-safe, polymorphic set of services.
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class execution_context;
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class service_already_exists : public logic_error { };
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class service_already_exists : public logic_error
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{
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template<typename _Service, typename... _Args>
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friend _Service&
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make_service(execution_context&, _Args&&...);
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service_already_exists() : logic_error("service already exists") { }
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};
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template<typename _Tp> struct is_executor;
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@ -0,0 +1,36 @@
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// Copyright (C) 2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do compile { target c++14 } }
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#include <experimental/executor>
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namespace net = std::experimental::net;
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struct S : net::execution_context::service
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{
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using key_type = S;
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S(net::execution_context&);
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void shutdown() noexcept override { }
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};
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void test01(net::execution_context& c)
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{
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net::make_service<S>(c);
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}
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