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//
// Copyright (c) 2024 Alexander Grund
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#ifndef BOOST_LOCALE_STD_COLLATE_ADAPTER_HPP
#define BOOST_LOCALE_STD_COLLATE_ADAPTER_HPP
#include <boost/locale/collator.hpp>
#include <locale>
#include <utility>
namespace boost { namespace locale { namespace impl {
template<typename CharT, class Base>
class BOOST_SYMBOL_VISIBLE std_collate_adapter : public std::collate<CharT> {
public:
using typename std::collate<CharT>::string_type;
template<typename... TArgs>
explicit std_collate_adapter(TArgs&&... args) : base_(std::forward<TArgs>(args)...)
{}
protected:
int do_compare(const CharT* beg1, const CharT* end1, const CharT* beg2, const CharT* end2) const override
{
return base_.compare(collate_level::identical, beg1, end1, beg2, end2);
}
string_type do_transform(const CharT* beg, const CharT* end) const override
{
return base_.transform(collate_level::identical, beg, end);
}
long do_hash(const CharT* beg, const CharT* end) const override
{
return base_.hash(collate_level::identical, beg, end);
}
Base base_;
};
template<typename CharType, class CollatorImpl, typename... TArgs>
static std::locale create_collators(const std::locale& in, TArgs&&... args)
{
static_assert(std::is_base_of<collator<CharType>, CollatorImpl>::value, "Must be a collator implementation");
std::locale res(in, new CollatorImpl(args...));
return std::locale(res, new std_collate_adapter<CharType, CollatorImpl>(args...));
}
template<typename CharType, template<typename> class CollatorImpl, typename... TArgs>
static std::locale create_collators(const std::locale& in, TArgs&&... args)
{
return create_collators<CharType, CollatorImpl<CharType>>(in, args...);
}
}}} // namespace boost::locale::impl
#endif
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