| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/http_proto | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_HTTP_PROTO_IMPL_CONTEXT_HPP | ||
| 11 | #define BOOST_HTTP_PROTO_IMPL_CONTEXT_HPP | ||
| 12 | |||
| 13 | #include <boost/http_proto/detail/except.hpp> | ||
| 14 | #include <boost/http_proto/detail/type_index.hpp> | ||
| 15 | |||
| 16 | #include <boost/mp11/utility.hpp> | ||
| 17 | #include <utility> | ||
| 18 | |||
| 19 | namespace boost { | ||
| 20 | namespace http_proto { | ||
| 21 | |||
| 22 | namespace detail { | ||
| 23 | |||
| 24 | template<class T> | ||
| 25 | using get_key_impl = | ||
| 26 | typename T::key_type; | ||
| 27 | |||
| 28 | template<class T> | ||
| 29 | using get_key_type = | ||
| 30 | mp11::mp_eval_or<T, get_key_impl, T>; | ||
| 31 | |||
| 32 | } // detail | ||
| 33 | |||
| 34 | //------------------------------------------------ | ||
| 35 | |||
| 36 | template<class T, class... Args> | ||
| 37 | T& | ||
| 38 | 32 | context:: | |
| 39 | make_service( | ||
| 40 | Args&&... args) | ||
| 41 | { | ||
| 42 | static_assert( | ||
| 43 | std::is_base_of<service, T>::value, | ||
| 44 | "Type requirements not met."); | ||
| 45 | |||
| 46 | auto const ti = detail::get_type_index< | ||
| 47 | 32 | detail::get_key_type<T>>(); | |
| 48 | 32 | auto const ps = find_service_impl(ti); | |
| 49 |
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32 | if(ps) |
| 50 | ✗ | detail::throw_invalid_argument( | |
| 51 | "service exists"); | ||
| 52 |
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64 | return detail::downcast<T&>( |
| 53 | make_service_impl(ti, | ||
| 54 |
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1 | std::unique_ptr<service>( |
| 55 |
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32 | new T(*this, std::forward< |
| 56 | 95 | Args>(args)...)))); | |
| 57 | } | ||
| 58 | |||
| 59 | template<class T> | ||
| 60 | T* | ||
| 61 | 2089 | context:: | |
| 62 | find_service() const noexcept | ||
| 63 | { | ||
| 64 | auto const ti = detail::get_type_index< | ||
| 65 | 2089 | detail::get_key_type<T>>(); | |
| 66 | 2089 | auto const ps = find_service_impl(ti); | |
| 67 |
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2089 | if(! ps) |
| 68 | ✗ | return nullptr; | |
| 69 | 2089 | return detail::downcast<T*>(ps); | |
| 70 | } | ||
| 71 | |||
| 72 | template<class T> | ||
| 73 | bool | ||
| 74 | context:: | ||
| 75 | has_service() const noexcept | ||
| 76 | { | ||
| 77 | return find_service<T>() != nullptr; | ||
| 78 | } | ||
| 79 | |||
| 80 | template<class T> | ||
| 81 | T& | ||
| 82 | 1044 | context:: | |
| 83 | get_service() const | ||
| 84 | { | ||
| 85 | 1044 | auto ps = find_service<T>(); | |
| 86 | 1044 | if(! ps) | |
| 87 | ✗ | detail::throw_invalid_argument( | |
| 88 | "service not found"); | ||
| 89 | 1044 | return *ps; | |
| 90 | } | ||
| 91 | |||
| 92 | } // http_proto | ||
| 93 | } // boost | ||
| 94 | |||
| 95 | #endif | ||
| 96 |