113 lines
2.6 KiB
C++
113 lines
2.6 KiB
C++
//
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// Copyright (c) 2019-2024 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_MYSQL_DETAIL_EXECUTION_CONCEPTS_HPP
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#define BOOST_MYSQL_DETAIL_EXECUTION_CONCEPTS_HPP
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#include <boost/mysql/statement.hpp>
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#include <boost/mysql/string_view.hpp>
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#include <boost/mysql/detail/config.hpp>
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#include <type_traits>
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#ifdef BOOST_MYSQL_HAS_CONCEPTS
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namespace boost {
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namespace mysql {
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// Forward decls
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template <class... StaticRow>
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class static_execution_state;
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template <class... StaticRow>
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class static_results;
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class execution_state;
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class results;
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namespace detail {
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// Execution state
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template <class T>
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struct is_static_execution_state : std::false_type
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{
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};
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template <class... T>
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struct is_static_execution_state<static_execution_state<T...>> : std::true_type
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{
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};
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template <class T>
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concept execution_state_type = std::is_same_v<T, execution_state> || is_static_execution_state<T>::value;
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// Results
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template <class T>
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struct is_static_results : std::false_type
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{
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};
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template <class... T>
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struct is_static_results<static_results<T...>> : std::true_type
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{
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};
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template <class T>
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concept results_type = std::is_same_v<T, results> || is_static_results<T>::value;
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// Execution request
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template <class T>
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struct is_bound_statement_tuple : std::false_type
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{
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};
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template <class T>
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struct is_bound_statement_tuple<bound_statement_tuple<T>> : std::true_type
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{
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};
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template <class T>
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struct is_bound_statement_range : std::false_type
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{
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};
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template <class T>
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struct is_bound_statement_range<bound_statement_iterator_range<T>> : std::true_type
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{
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};
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template <class T>
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struct is_execution_request
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{
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using without_cvref = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
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static constexpr bool value = std::is_convertible<T, string_view>::value ||
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is_bound_statement_tuple<without_cvref>::value ||
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is_bound_statement_range<without_cvref>::value;
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};
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template <class T>
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concept execution_request = is_execution_request<T>::value;
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} // namespace detail
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} // namespace mysql
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} // namespace boost
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#define BOOST_MYSQL_EXECUTION_STATE_TYPE ::boost::mysql::detail::execution_state_type
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#define BOOST_MYSQL_RESULTS_TYPE ::boost::mysql::detail::results_type
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#define BOOST_MYSQL_EXECUTION_REQUEST ::boost::mysql::detail::execution_request
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#else
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#define BOOST_MYSQL_EXECUTION_STATE_TYPE class
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#define BOOST_MYSQL_RESULTS_TYPE class
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#define BOOST_MYSQL_EXECUTION_REQUEST class
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#endif
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#endif
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