mirror of
https://github.com/matrix-construct/construct
synced 2024-11-09 11:31:11 +01:00
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#define HAVE_IRCD_JS_GENERATOR_H
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namespace ircd {
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namespace js {
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struct generator
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{
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object state;
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object last;
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bool done() const;
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template<class... args> value next(args&&...);
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template<class... args> value _throw(args&&...);
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template<class... args> value _return(args&&...);
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generator(object::handle state);
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generator(object state);
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generator() = default;
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};
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inline
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generator::generator(object state)
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:state{state}
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{
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}
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inline
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generator::generator(object::handle state)
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:state{state}
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{
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}
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template<class... args>
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value
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generator::_return(args&&... a)
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{
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function func(get(state, "return"));
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last = func(state, std::forward<args>(a)...);
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return has(last, "value")? get(last, "value") : value{};
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}
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template<class... args>
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value
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generator::_throw(args&&... a)
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{
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function func(get(state, "throw"));
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last = func(state, std::forward<args>(a)...);
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return has(last, "value")? get(last, "value") : value{};
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}
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template<class... args>
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value
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generator::next(args&&... a)
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{
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function func(get(state, "next"));
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last = func(state, std::forward<args>(a)...);
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return has(last, "value")? get(last, "value") : value{};
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}
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inline bool
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generator::done()
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const
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{
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return bool(get(last, "done"));
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}
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} // namespace js
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} // namespace ircd
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