0b6a182c
 Hu Chunming
添加无鉴权注册和注销
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// Copyright (c) 2016-2022 Antony Polukhin
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_PFR_DETAIL_IO_HPP
#define BOOST_PFR_DETAIL_IO_HPP
#pragma once
#include <boost/pfr/detail/config.hpp>
#include <boost/pfr/detail/sequence_tuple.hpp>
#include <iosfwd> // stream operators
#include <iomanip>
#if defined(__has_include)
# if __has_include(<string_view>) && BOOST_PFR_USE_CPP17
# include <string_view>
# endif
#endif
namespace boost { namespace pfr { namespace detail {
inline auto quoted_helper(const std::string& s) noexcept {
return std::quoted(s);
}
#if defined(__has_include)
# if __has_include(<string_view>) && BOOST_PFR_USE_CPP17
template <class CharT, class Traits>
inline auto quoted_helper(std::basic_string_view<CharT, Traits> s) noexcept {
return std::quoted(s);
}
# endif
#endif
inline auto quoted_helper(std::string& s) noexcept {
return std::quoted(s);
}
template <class T>
inline decltype(auto) quoted_helper(T&& v) noexcept {
return std::forward<T>(v);
}
template <std::size_t I, std::size_t N>
struct print_impl {
template <class Stream, class T>
static void print (Stream& out, const T& value) {
if (!!I) out << ", ";
out << detail::quoted_helper(boost::pfr::detail::sequence_tuple::get<I>(value));
print_impl<I + 1, N>::print(out, value);
}
};
template <std::size_t I>
struct print_impl<I, I> {
template <class Stream, class T> static void print (Stream&, const T&) noexcept {}
};
template <std::size_t I, std::size_t N>
struct read_impl {
template <class Stream, class T>
static void read (Stream& in, const T& value) {
char ignore = {};
if (!!I) {
in >> ignore;
if (ignore != ',') in.setstate(Stream::failbit);
in >> ignore;
if (ignore != ' ') in.setstate(Stream::failbit);
}
in >> detail::quoted_helper( boost::pfr::detail::sequence_tuple::get<I>(value) );
read_impl<I + 1, N>::read(in, value);
}
};
template <std::size_t I>
struct read_impl<I, I> {
template <class Stream, class T> static void read (Stream&, const T&) {}
};
}}} // namespace boost::pfr::detail
#endif // BOOST_PFR_DETAIL_IO_HPP
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