mirror of
https://github.com/zeromq/libzmq.git
synced 2025-01-06 00:31:13 +01:00
217e0ae9c6
Updated:
src/metdata.hpp: Remove explicit "const" from key of std::map<>
because the key is implicitly const already (see
http://en.cppreference.com/w/cpp/container/map and
http://www.cplusplus.com/reference/map/map/).
On some platforms (such as z/OS UNIX System Services) explicitly
declaring the map key as "const" causes template expansion errors
as it tries to create separate allocators for "const const std::string"
and "const std::string" only to find that they clash. (Presumably
some compilers collapse these into one earlier.)
There are no template expansion errors if the map key is left to be
implicitly const.
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
/*
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Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_METADATA_HPP_INCLUDED__
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#define __ZMQ_METADATA_HPP_INCLUDED__
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#include <map>
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#include <string>
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#include "atomic_counter.hpp"
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namespace zmq
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{
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class metadata_t
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{
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public:
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typedef std::map <std::string, const std::string> dict_t;
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metadata_t (const dict_t &dict);
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virtual ~metadata_t ();
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// Returns pointer to property value or NULL if
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// property is not found.
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virtual const char *get (const std::string &property) const;
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virtual void add_ref ();
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// Drop reference. Returns true iff the reference
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// counter drops to zero.
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virtual bool drop_ref ();
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private:
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// Reference counter.
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atomic_counter_t ref_cnt;
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// Dictionary holding metadata.
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const dict_t dict;
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};
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}
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#endif
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