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94 lines
2.0 KiB
C++
94 lines
2.0 KiB
C++
// Copyright Toru Niina 2017.
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// Distributed under the MIT License.
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#ifndef TOML11_UTILITY_HPP
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#define TOML11_UTILITY_HPP
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#include <memory>
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#include <sstream>
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#include <utility>
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#include "traits.hpp"
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#if __cplusplus >= 201402L
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# define TOML11_MARK_AS_DEPRECATED(msg) [[deprecated(msg)]]
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#elif defined(__GNUC__)
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# define TOML11_MARK_AS_DEPRECATED(msg) __attribute__((deprecated(msg)))
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#elif defined(_MSC_VER)
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# define TOML11_MARK_AS_DEPRECATED(msg) __declspec(deprecated(msg))
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#else
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# define TOML11_MARK_AS_DEPRECATED
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#endif
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namespace toml
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{
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#if __cplusplus >= 201402L
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using std::make_unique;
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#else
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template<typename T, typename ... Ts>
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inline std::unique_ptr<T> make_unique(Ts&& ... args)
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{
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return std::unique_ptr<T>(new T(std::forward<Ts>(args)...));
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}
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#endif // __cplusplus >= 2014
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namespace detail
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{
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template<typename Container>
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void try_reserve_impl(Container& container, std::size_t N, std::true_type)
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{
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container.reserve(N);
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return;
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}
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template<typename Container>
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void try_reserve_impl(Container&, std::size_t, std::false_type) noexcept
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{
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return;
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}
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} // detail
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template<typename Container>
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void try_reserve(Container& container, std::size_t N)
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{
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if(N <= container.size()) {return;}
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detail::try_reserve_impl(container, N, detail::has_reserve_method<Container>{});
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return;
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}
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namespace detail
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{
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inline std::string concat_to_string_impl(std::ostringstream& oss)
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{
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return oss.str();
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}
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template<typename T, typename ... Ts>
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std::string concat_to_string_impl(std::ostringstream& oss, T&& head, Ts&& ... tail)
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{
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oss << std::forward<T>(head);
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return concat_to_string_impl(oss, std::forward<Ts>(tail) ... );
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}
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} // detail
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template<typename ... Ts>
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std::string concat_to_string(Ts&& ... args)
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{
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std::ostringstream oss;
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oss << std::boolalpha << std::fixed;
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return detail::concat_to_string_impl(oss, std::forward<Ts>(args) ...);
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}
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template<typename T>
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T from_string(const std::string& str, T opt)
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{
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T v(opt);
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std::istringstream iss(str);
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iss >> v;
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return v;
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}
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}// toml
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#endif // TOML11_UTILITY
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