72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
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// Copyright 2011 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/// \file engine/action.hpp
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/// Representation of user-initiated actions.
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#if !defined(ENGINE_ACTION_HPP)
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#define ENGINE_ACTION_HPP
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#include <ostream>
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#include <tr1/memory>
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namespace engine {
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class context;
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/// Representation of an action.
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///
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/// The instances of this class are unique (i.e. copying the objects only yields
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/// a shallow copy that shares the same internal implementation). This is a
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/// requirement for the 'store' API model.
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class action {
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struct impl;
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/// Pointer to the shared internal implementation.
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std::tr1::shared_ptr< impl > _pimpl;
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public:
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explicit action(const context&);
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~action(void);
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const context& runtime_context(void) const;
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bool operator==(const action&) const;
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bool operator!=(const action&) const;
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};
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std::ostream& operator<<(std::ostream&, const action&);
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} // namespace engine
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#endif // !defined(ENGINE_ACTION_HPP)
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