mirror of
https://github.com/Naios/continuable.git
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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
/**
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Copyright(c) 2015 - 2017 Denis Blank <denis.blank at outlook dot com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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**/
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#include <exception>
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#include <functional>
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#include <string>
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#include <system_error>
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struct continuable_base {
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template <typename T> continuable_base& then(T&&) { return *this; }
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template <typename T> continuable_base& dropped(T&&) { return *this; }
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template <typename T> continuable_base& thrown(T&&) { return *this; }
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template <typename T> continuable_base& failed(T&&) { return *this; }
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};
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template <typename... Result> struct accumulator {
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auto accumulate() {
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return [] {};
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}
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};
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template <typename Accumulator, typename... Initial>
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auto make_accumulator(Accumulator&& /*ac*/, Initial&&... /*initial*/) {
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return std::make_tuple(continuable_base{}, accumulator<int>{});
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}
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continuable_base http_request(std::string) { return {}; }
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int main(int, char**) {
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auto accumulator = make_accumulator(std::plus<int>{}, 0);
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http_request("github.com")
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.then([](std::string response) {
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// ...
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(void)response;
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})
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.then(std::get<1>(accumulator).accumulate())
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.thrown([](std::exception_ptr exception) {
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// ...
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(void)exception;
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})
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.failed([](std::error_code code) {
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// ...
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(void)code;
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});
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return 0;
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}
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