string.hpp

#pragma once
 
// Just in case, because we can't ignore some warnings from `-Wpedantic` (about zero size arrays and anonymous structs when gnu extensions are disabled) on gcc
#if defined(__clang__)
#  pragma clang system_header
#elif defined(__GNUC__)
#  pragma GCC system_header
#endif
 
#include <initializer_list>  // for std::initializer_list
#include <string_view>       // for std::basic_string_view
#include <type_traits>       // for std::is_constant_evaluated, std::declval, std::false_type
#include <algorithm>         // for std::min, std::max
#include <concepts>          // for std::unsigned_integral, std::signed_integral
#include <iterator>          // for std::distance, std::next, std::iterator_traits, std::input_iterator
#include <utility>           // for std::move, std::hash
#include <compare>           // for std::strong_ordering
#include <memory>            // for std::allocator, std::swap, std::allocator_traits
#include <limits>            // for std::numeric_limits
#include <charconv>          // for std::to_chars
 
#include <cstdint>
#include <cstddef>
#include <cstdarg>
 
#if PLUGIFY_STRING_CONTAINERS_RANGES && (__cplusplus <= 202002L || !__has_include(<ranges>) || !defined(__cpp_lib_containers_ranges))
#  undef PLUGIFY_STRING_CONTAINERS_RANGES
#  define PLUGIFY_STRING_CONTAINERS_RANGES 0
#endif
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
#  include <ranges>
#endif
 
#ifndef PLUGIFY_STRING_NO_NUMERIC_CONVERSIONS
#  include <cstdlib>
#endif
 
#ifndef PLUGIFY_STRING_NO_STD_FORMAT
#  include "compat_format.hpp"
#endif
 
#include "macro.hpp"
 
namespace plg {
    namespace detail {
        template<typename Allocator, typename = void>
        struct is_allocator : std::false_type {};
 
        template<typename Allocator>
        struct is_allocator<Allocator, std::void_t<typename Allocator::value_type, decltype(std::declval<Allocator&>().allocate(std::size_t{}))>> : std::true_type {};
 
        template<typename Allocator>
        constexpr inline bool is_allocator_v = is_allocator<Allocator>::value;
 
        template<typename Traits>
        using is_traits = std::conjunction<std::is_integral<typename Traits::char_type>, std::is_integral<typename Traits::char_traits::char_type>>;
 
        template<typename Traits>
        constexpr bool is_traits_v = is_traits<Traits>::value;
 
        struct uninitialized_size_tag {};
 
        template<typename>
        constexpr bool dependent_false = false;
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
        template<typename Range, typename Type>
        concept string_compatible_range = std::ranges::input_range<Range> && std::convertible_to<std::ranges::range_reference_t<Range>, Type>;
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
    }// namespace detail
 
    // basic_string
    // based on implementations from libc++, libstdc++ and Microsoft STL
    template<typename Char, typename Traits = std::char_traits<Char>, typename Allocator = std::allocator<Char>>
    class basic_string {
    private:
        using allocator_traits = std::allocator_traits<Allocator>;
    public:
        using traits_type = Traits;
        using value_type = typename traits_type::char_type;
        using allocator_type = Allocator;
        using size_type = typename allocator_traits::size_type;
        using difference_type = typename allocator_traits::difference_type;
        using reference = value_type&;
        using const_reference = const value_type&;
        using pointer = typename allocator_traits::pointer;
        using const_pointer = typename allocator_traits::const_pointer;
        using iterator = pointer;
        using const_iterator = const_pointer;
        using reverse_iterator = std::reverse_iterator<iterator>;
        using const_reverse_iterator = std::reverse_iterator<const_iterator>;
        using sview_type = std::basic_string_view<Char, Traits>;
 
        constexpr static size_type npos = static_cast<size_t>(-1);
 
    private:
        constexpr static auto _terminator = value_type();
 
        PLUGIFY_NO_UNIQUE_ADDRESS
        allocator_type _allocator;
 
        PLUGIFY_WARN_PUSH()
 
#if defined(__clang__)
        PLUGIFY_WARN_IGNORE("-Wgnu-anonymous-struct")
        PLUGIFY_WARN_IGNORE("-Wzero-length-array")
#elif defined(__GNUC__)
        PLUGIFY_WARN_IGNORE("-Wpedantic")
#elif defined(_MSC_VER)
        PLUGIFY_WARN_IGNORE(4201)
        PLUGIFY_WARN_IGNORE(4200)
#endif
 
        template<typename CharT, std::size_t = sizeof(CharT)>
        struct padding {
            [[maybe_unused]] uint8_t padding[sizeof(CharT) - 1];
        };
 
        template<typename CharT>
        struct padding<CharT, 1> {
            // template specialization to remove the padding structure to avoid warnings on zero length arrays
            // also, this allows us to take advantage of the empty-base-class optimization.
        };
 
        // size must correspond to the last byte of long_data.cap, so we don't want the compiler to insert
        // padding after size if sizeof(value_type) != 1; Also ensures both layouts are the same size.
        struct sso_size : padding<value_type> {
            PLUGIFY_PACK(struct {
                uint8_t spare_size : 7;
                uint8_t is_long : 1;
            });
        };
 
        static constexpr int char_bit = std::numeric_limits<uint8_t>::digits + std::numeric_limits<uint8_t>::is_signed;
        static_assert(char_bit == 8, "assumes an 8 bit byte.");
 
        struct long_data {
            pointer data;
            size_type size;
            PLUGIFY_PACK(struct {
                size_type cap : sizeof(size_type) * char_bit - 1;
                size_type is_long : 1;
            });
        };
 
        static constexpr size_type min_cap = (sizeof(long_data) - 1) / sizeof(value_type) > 2 ? (sizeof(long_data) - 1) / sizeof(value_type) : 2;
 
        struct short_data {
            value_type data[min_cap];
            sso_size size;
        };
 
        PLUGIFY_WARN_POP()
 
        static_assert(sizeof(short_data) == (sizeof(value_type) * (min_cap + 1)), "short has an unexpected size.");
        static_assert(sizeof(short_data) == sizeof(long_data), "short and long layout structures must be the same size");
 
        union {
            long_data _long;
            short_data _short{};
        } _storage;
 
        [[nodiscard]] constexpr static bool fits_in_sso(size_type size) noexcept {
            return size < min_cap;
        }
 
        constexpr void long_init() noexcept {
            set_long(true);
            set_long_data(nullptr);
            set_long_size(0);
            set_long_cap(0);
        }
 
        constexpr void short_init() noexcept {
            set_long(false);
            set_short_size(0);
        }
 
        constexpr void default_init(size_type size) noexcept {
            if (fits_in_sso(size))
                short_init();
            else
                long_init();
        }
 
        [[nodiscard]] constexpr auto& get_long_data() noexcept {
            return _storage._long.data;
        }
 
        [[nodiscard]] constexpr const auto& get_long_data() const noexcept {
            return _storage._long.data;
        }
 
        [[nodiscard]] constexpr auto& get_short_data() noexcept {
            return _storage._short.data;
        }
 
        [[nodiscard]] constexpr const auto& get_short_data() const noexcept {
            return _storage._short.data;
        }
 
        constexpr void set_short_size(size_type size) noexcept {
            _storage._short.size.spare_size = min_cap - (size & 0x7F);
        }
 
        [[nodiscard]] constexpr size_type get_short_size() const noexcept {
            return min_cap - _storage._short.size.spare_size;
        }
 
        constexpr void set_long_size(size_type size) noexcept {
            _storage._long.size = size;
        }
 
        [[nodiscard]] constexpr size_type get_long_size() const noexcept {
            return _storage._long.size;
        }
 
        constexpr void set_long_cap(size_type cap) noexcept {
            _storage._long.cap = (cap & 0x7FFFFFFFFFFFFFFF);
        }
 
        [[nodiscard]] constexpr size_type get_long_cap() const noexcept {
            return _storage._long.cap;
        }
 
        constexpr void set_long_data(value_type* data) noexcept {
            _storage._long.data = data;
        }
 
        [[nodiscard]] constexpr bool is_long() const noexcept {
            return _storage._long.is_long == true;
        }
 
        constexpr void set_long(bool is_long) noexcept {
            _storage._long.is_long = is_long;
        }
 
        constexpr void set_size(size_type size) noexcept {
            if (is_long())
                set_long_size(size);
            else
                set_short_size(size);
        }
 
        [[nodiscard]] constexpr sview_type view() const noexcept {
            return sview_type(data(), size());
        }
 
        constexpr void reallocate(size_type new_cap, bool copy_old) {
            if (new_cap == get_long_cap())
                return;
 
            auto old_len = get_long_size();
            auto old_cap = get_long_cap();
            auto& old_buffer = get_long_data();
 
            auto new_len = std::min(new_cap, old_len);
            auto new_data = allocator_traits::allocate(_allocator, new_cap + 1);
 
            if (old_buffer != nullptr) {
                if (old_len != 0 && copy_old)
                    Traits::copy(new_data, old_buffer, new_len);
                allocator_traits::deallocate(_allocator, old_buffer, old_cap + 1);
            }
 
            set_long_data(new_data);
            set_long_size(new_len);
            set_long_cap(new_cap);
        }
 
        constexpr void deallocate() {
            if (is_long()) {
                if (auto& buffer = get_long_data(); buffer != nullptr) {
                    allocator_traits::deallocate(_allocator, buffer, get_long_cap() + 1);
                    buffer = nullptr;
                }
            }
        }
 
        constexpr void grow_to(size_type new_cap) {
            if (is_long() == true) {
                reallocate(new_cap, true);
                return;
            }
 
            auto buffer = allocator_traits::allocate(_allocator, new_cap + 1);
            auto len = get_short_size();
 
            Traits::copy(buffer, get_short_data(), len);
            Traits::assign(buffer[len], _terminator);
 
            long_init();
            set_long_data(buffer);
            set_long_size(len);
            set_long_cap(new_cap);
        }
 
        constexpr void null_terminate() {
            auto buffer = data();
            if (buffer == nullptr) [[unlikely]]
                return;
            Traits::assign(buffer[size()], _terminator);
        }
 
        [[nodiscard]] constexpr bool addr_in_range(const_pointer ptr) const noexcept {
            if (std::is_constant_evaluated())
                return false;
            else
                return data() <= ptr && ptr <= data() + size();
        }
 
        template<typename F>
        constexpr void internal_replace_impl(const F& func, size_type pos, size_type oldcount, size_type count) {
            auto cap = capacity();
            auto sz = size();
 
            auto rsz = sz - oldcount + count;
 
            if (cap < rsz)
                grow_to(rsz);
 
            if (oldcount != count)
                Traits::move(data() + pos + count, data() + pos + oldcount, sz - pos - oldcount);
 
            func();
 
            set_size(rsz);
            null_terminate();
        }
 
        constexpr void internal_replace(size_type pos, const_pointer str, size_type oldcount, size_type count) {
            if (addr_in_range(str)) {
                basic_string rstr(str, count);
                internal_replace_impl([&]() { Traits::copy(data() + pos, rstr.data(), count); }, pos, oldcount, count);
            } else
                internal_replace_impl([&]() { Traits::copy(data() + pos, str, count); }, pos, oldcount, count);
        }
 
        constexpr void internal_replace(size_type pos, value_type ch, size_type oldcount, size_type count) {
            internal_replace_impl([&]() { Traits::assign(data() + pos, count, ch); }, pos, oldcount, count);
        }
 
        template<typename F>
        constexpr void internal_insert_impl(const F& func, size_type pos, size_type count) {
            if (count == 0) [[unlikely]]
                return;
 
            auto cap = capacity();
            auto sz = size();
            auto rsz = sz + count;
 
            if (cap < rsz)
                grow_to(rsz);
 
            Traits::move(data() + pos + count, data() + pos, sz - pos);
            func();
 
            set_size(rsz);
            null_terminate();
        }
 
        constexpr void internal_insert(size_type pos, const_pointer str, size_type count) {
            if (addr_in_range(str)) {
                basic_string rstr(str, count);
                internal_insert_impl([&]() { Traits::copy(data() + pos, rstr.data(), count); }, pos, count);
            } else
                internal_insert_impl([&]() { Traits::copy(data() + pos, str, count); }, pos, count);
        }
 
        constexpr void internal_insert(size_type pos, value_type ch, size_type count) {
            internal_insert_impl([&]() { Traits::assign(data() + pos, count, ch); }, pos, count);
        }
 
        template<typename F>
        constexpr void internal_append_impl(const F& func, size_type count) {
            if (count == 0) [[unlikely]]
                return;
 
            auto cap = capacity();
            auto sz = size();
            auto rsz = sz + count;
 
            if (cap < rsz)
                grow_to(rsz);
 
            func(sz);
            set_size(rsz);
            null_terminate();
        }
 
        constexpr void internal_append(const_pointer str, size_type count) {
            if (addr_in_range(str)) {
                basic_string rstr(str, count);
                internal_append_impl([&](size_type pos) { Traits::copy(data() + pos, rstr.data(), count); }, count);
            } else
                internal_append_impl([&](size_type pos) { Traits::copy(data() + pos, str, count); }, count);
        }
 
        constexpr void internal_append(value_type ch, size_type count) {
            internal_append_impl([&](size_type pos) { Traits::assign(data() + pos, count, ch); }, count);
        }
 
        template<typename F>
        constexpr void internal_assign_impl(const F& func, size_type size, bool copy_old) {
            if (fits_in_sso(size)) {
                if (is_long() == true) {
                    deallocate();
                    short_init();
                }
 
                set_short_size(size);
                func(get_short_data());
                null_terminate();
            } else {
                if (is_long() == false)
                    long_init();
                if (get_long_cap() < size)
                    reallocate(size, copy_old);
 
                func(get_long_data());
                set_long_size(size);
                null_terminate();
            }
        }
 
        constexpr void internal_assign(const_pointer str, size_type size, bool copy_old = false) {
            if (addr_in_range(str)) {
                basic_string rstr(str, size);
                internal_assign_impl([&](auto data) { Traits::copy(data, rstr.data(), size); }, size, copy_old);
            } else
                internal_assign_impl([&](auto data) { Traits::copy(data, str, size); }, size, copy_old);
        }
 
        constexpr void internal_assign(value_type ch, size_type count, bool copy_old = false) {
            internal_assign_impl([&](auto data) { Traits::assign(data, count, ch); }, count, copy_old);
        }
 
    public:
        explicit constexpr basic_string(detail::uninitialized_size_tag, size_type size, const Allocator& allocator)
            : _allocator(allocator) {
            PLUGIFY_ASSERT(size <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            if (fits_in_sso(size))
                short_init();
            else {
                long_init();
                reallocate(size, false);
            }
            set_size(size);
        }
 
        constexpr basic_string() noexcept(std::is_nothrow_default_constructible<Allocator>::value)
            : basic_string(Allocator()) {}
 
        explicit constexpr basic_string(const Allocator& allocator) noexcept
            : _allocator(allocator) {
            short_init();
        }
 
        constexpr basic_string(size_type count, value_type ch, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            PLUGIFY_ASSERT(count <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(ch, count);
        }
 
        constexpr basic_string(const basic_string& str, size_type pos, size_type count, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            PLUGIFY_ASSERT(pos <= str.size(), "plg::basic_string::basic_string(): pos out of range", std::out_of_range);
            auto len = std::min(count, str.size() - pos);
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(str.data() + pos, len);
        }
        constexpr basic_string(const basic_string& str, size_type pos, const Allocator& allocator = Allocator())
            : basic_string(str, pos, npos, allocator) {}
 
        constexpr basic_string(const value_type* str, size_type count, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            PLUGIFY_ASSERT(count <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(str, count);
        }
 
        constexpr basic_string(const value_type* str, const Allocator& allocator = Allocator())
            : basic_string(str, Traits::length(str), allocator) {}
 
        template<PLUGIFY_INPUT_ITERATOR InputIterator>
        constexpr basic_string(InputIterator first, InputIterator last, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            auto len = size_type(std::distance(first, last));
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(const_pointer(first), len);
        }
 
        constexpr basic_string(const basic_string& str, const Allocator& allocator)
            : _allocator(allocator) {
            auto len = str.length();
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(str.data(), len);
        }
        constexpr basic_string(const basic_string& str)
            : basic_string(str, str.get_allocator()) {}
 
        constexpr basic_string(basic_string&& str) noexcept(std::is_nothrow_move_constructible<Allocator>::value)
            : _allocator(std::move(str._allocator)), _storage(std::move(str._storage)) {
            str.short_init();
        }
 
        constexpr basic_string(basic_string&& str, const Allocator& allocator)
            : _allocator(allocator) {
            if constexpr (allocator_traits::is_always_equal::value) {
                std::swap(_storage, str._storage);
            } else {
                if (!str.is_long() || get_allocator() == str.get_allocator()) {
                    std::swap(_storage, str._storage);
                } else {
                    internal_assign(str.data(), str.size());
                    str.deallocate();
                }
            }
            str.short_init();
        }
 
        constexpr basic_string(std::initializer_list<value_type> list, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            auto len = list.size();
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(const_pointer(list.begin()), len);
        }
 
#if __cpp_impl_three_way_comparison
        template<typename Type>
            requires(std::is_convertible_v<const Type&, sview_type>)
        constexpr basic_string(const Type& t, size_type pos, size_type count, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            auto sv = sview_type(t);
            PLUGIFY_ASSERT(pos <= sv.length(), "plg::basic_string::basic_string(): pos out of range", std::out_of_range);
            auto ssv = sv.substr(pos, count);
            auto len = ssv.length();
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(ssv.data(), len);
        }
#endif // __cpp_impl_three_way_comparison
 
        template<typename Type>
#if __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string(const Type& t, const Allocator& allocator = Allocator())
            : _allocator(allocator) {
            sview_type sv(t);
            auto len = sv.length();
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::basic_string(): constructed string size would exceed max_size()", std::length_error);
            internal_assign(sv.data(), len);
        }
 
        constexpr basic_string(basic_string&& str, size_type pos, size_type count, const Allocator& allocator = Allocator())
            : basic_string(std::move(str), allocator) {
            PLUGIFY_ASSERT(pos <= str.size(), "plg::basic_string::basic_string(): pos out of range", std::out_of_range);
            erase(pos, count);
        }
 
        constexpr basic_string(basic_string&& str, size_type pos, const Allocator& allocator = Allocator())
            : basic_string(std::move(str), pos, npos, allocator) {}
 
#if __cplusplus > 202002L
        basic_string(std::nullptr_t) = delete;
#endif // __cplusplus > 202002L
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
        template<detail::string_compatible_range<Char> Range>
        constexpr basic_string(std::from_range_t, Range&& range, const Allocator& allocator = Allocator())
            : basic_string(std::ranges::begin(range), std::ranges::end(range), allocator) {}
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
 
#if __cpp_constexpr >= 201907L
        constexpr 
#endif // __cpp_constexpr >= 201907L
        ~basic_string() {
            deallocate();
        }
 
        constexpr basic_string& operator=(const basic_string& str) {
            return assign(str);
        }
 
        constexpr basic_string& operator=(basic_string&& str) noexcept(
                allocator_traits::propagate_on_container_move_assignment::value ||
                allocator_traits::is_always_equal::value) {
            return assign(std::move(str));
        }
 
        constexpr basic_string& operator=(const value_type* str) {
            return assign(str, Traits::length(str));
        }
 
        constexpr basic_string& operator=(value_type ch) {
            return assign(std::addressof(ch), 1);
        }
 
        constexpr basic_string& operator=(std::initializer_list<value_type> list) {
            return assign(list.begin(), list.size());
        }
 
        template<typename Type>
#if __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& operator=(const Type& t) {
            sview_type sv(t);
            return assign(sv);
        }
 
#if __cplusplus > 202002L
        constexpr basic_string& operator=(std::nullptr_t) = delete;
#endif
 
        constexpr basic_string& assign(size_type count, value_type ch) {
            PLUGIFY_ASSERT(count <= max_size(), "plg::basic_string::assign(): resulted string size would exceed max_size()", std::length_error);
            internal_assign(ch, count);
            return *this;
        }
 
        constexpr basic_string& assign(const basic_string& str, size_type pos, size_type count = npos) {
            PLUGIFY_ASSERT(pos <= str.size(), "plg::basic_string::assign(): pos out of range", std::out_of_range);
            internal_assign(str.data(), std::min(count, str.size() - pos));
            return *this;
        }
 
        constexpr basic_string& assign(const basic_string& str) {
            if (this == &str) [[unlikely]]
                return *this;
 
            if constexpr (allocator_traits::propagate_on_container_copy_assignment::value) {
                if constexpr (!allocator_traits::is_always_equal::value) {
                    if (get_allocator() != str.get_allocator()) {
                        deallocate();
                        short_init();
                    }
                }
                _allocator = str._allocator;
            }
 
            internal_assign(str.data(), str.size());
            return *this;
        }
 
        constexpr basic_string& assign(basic_string&& str) noexcept(
                allocator_traits::propagate_on_container_move_assignment::value ||
                allocator_traits::is_always_equal::value) {
            if (this == &str) [[unlikely]]
                return *this;
 
            if constexpr (allocator_traits::propagate_on_container_move_assignment::value) {
                if constexpr (!allocator_traits::is_always_equal::value) {
                    if (get_allocator() != str.get_allocator()) {
                        deallocate();
                        short_init();
                    }
                }
                _allocator = std::move(str._allocator);
            }
 
            if constexpr (allocator_traits::propagate_on_container_move_assignment::value || allocator_traits::is_always_equal::value) {
                deallocate();
                short_init();
                std::swap(_storage, str._storage);
            } else {
                if (get_allocator() == str.get_allocator()) {
                    deallocate();
                    short_init();
                    std::swap(_storage, str._storage);
                } else {
                    internal_assign(str.data(), str.size());
                }
            }
 
            return *this;
        }
 
        constexpr basic_string& assign(const value_type* str, size_type count) {
            PLUGIFY_ASSERT(count <= max_size(), "plg::basic_string::assign(): resulted string size would exceed max_size()", std::length_error);
            internal_assign(str, count);
            return *this;
        }
 
        constexpr basic_string& assign(const value_type* str) {
            return assign(str, Traits::length(str));
        }
 
        template<PLUGIFY_INPUT_ITERATOR InputIterator>
        constexpr basic_string& assign(InputIterator first, InputIterator last) {
            auto len = static_cast<size_type>(std::distance(first, last));
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::assign(): resulted string size would exceed max_size()", std::length_error);
            internal_assign(const_pointer(first), len);
            return *this;
        }
 
        constexpr basic_string& assign(std::initializer_list<value_type> list) {
            auto len = list.size();
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::assign(): resulted string size would exceed max_size()", std::length_error);
            internal_assign(const_pointer(list.begin()), len);
            return *this;
        }
 
        template<typename Type>
#if __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& assign(const Type& t) {
            sview_type sv(t);
            return assign(sv.data(), sv.length());
        }
 
        template<typename Type>
#if __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& assign(const Type& t, size_type pos, size_type count = npos) {
            auto sv = sview_type(t).substr(pos, count);
            auto len = sv.length();
            PLUGIFY_ASSERT(len <= max_size(), "plg::basic_string::assign(): resulted string size would exceed max_size()", std::length_error);
            return assign(sv.data(), len);
        }
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
        template<detail::string_compatible_range<Char> Range>
        constexpr basic_string& assign_range(Range&& range) {
            auto str = basic_string(std::from_range, std::forward<Range>(range), _allocator);
            PLUGIFY_ASSERT(str.size() <= max_size(), "plg::basic_string::assign_range(): resulted string size would exceed max_size()", std::length_error);
            return assign(std::move(str));
        }
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
 
        [[nodiscard]] constexpr allocator_type get_allocator() const noexcept {
            return _allocator;
        }
 
        [[nodiscard]] constexpr reference operator[](size_type pos) {
            return data()[pos];
        }
 
        [[nodiscard]] constexpr const_reference operator[](size_type pos) const {
            return data()[pos];
        }
 
        [[nodiscard]] constexpr reference at(size_type pos) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::at(): pos out of range", std::out_of_range);
            return data()[pos];
        }
 
        [[nodiscard]] constexpr const_reference at(size_type pos) const {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::at(): pos out of range", std::out_of_range);
            return data()[pos];
        }
 
        [[nodiscard]] constexpr reference front() {
            PLUGIFY_ASSERT(!empty(), "plg::basic_string::front(): vector is empty", std::length_error);
            return data()[0];
        }
 
        [[nodiscard]] constexpr const_reference front() const {
            PLUGIFY_ASSERT(!empty(), "plg::basic_string::front(): vector is empty", std::length_error);
            return data()[0];
        }
 
        [[nodiscard]] constexpr reference back() {
            PLUGIFY_ASSERT(!empty(), "plg::basic_string::back(): vector is empty", std::length_error);
            return data()[size() - 1];
        }
 
        [[nodiscard]] constexpr const_reference back() const {
            PLUGIFY_ASSERT(!empty(), "plg::basic_string::back(): vector is empty", std::length_error);
            return data()[size() - 1];
        }
 
        [[nodiscard]] constexpr const value_type* data() const noexcept {
            return is_long() ? get_long_data() : get_short_data();
        }
 
        [[nodiscard]] constexpr value_type* data() noexcept {
            return is_long() ? get_long_data() : get_short_data();
        }
 
        [[nodiscard]] constexpr const value_type* c_str() const noexcept {
            return data();
        }
 
        [[nodiscard]] constexpr operator sview_type() const noexcept {
            return view();
        }
 
        [[nodiscard]] constexpr iterator begin() noexcept {
            return data();
        }
 
        [[nodiscard]] constexpr const_iterator begin() const noexcept {
            return data();
        }
 
        [[nodiscard]] constexpr const_iterator cbegin() const noexcept {
            return data();
        }
 
        [[nodiscard]] constexpr iterator end() noexcept {
            return data() + size();
        }
 
        [[nodiscard]] constexpr const_iterator end() const noexcept {
            return data() + size();
        }
 
        [[nodiscard]] constexpr const_iterator cend() const noexcept {
            return data() + size();
        }
 
        [[nodiscard]] constexpr reverse_iterator rbegin() noexcept {
            return reverse_iterator(end());
        }
 
        [[nodiscard]] constexpr const_reverse_iterator rbegin() const noexcept {
            return const_reverse_iterator(end());
        }
 
        [[nodiscard]] constexpr const_reverse_iterator crbegin() const noexcept {
            return const_reverse_iterator(cend());
        }
 
        [[nodiscard]] constexpr reverse_iterator rend() noexcept {
            return reverse_iterator(begin());
        }
 
        [[nodiscard]] constexpr const_reverse_iterator rend() const noexcept {
            return const_reverse_iterator(begin());
        }
 
        [[nodiscard]] constexpr const_reverse_iterator crend() const noexcept {
            return const_reverse_iterator(cbegin());
        }
 
        [[nodiscard]] constexpr bool empty() const noexcept {
            return size() == 0;
        }
 
        [[nodiscard]] constexpr size_type size() const noexcept {
            return is_long() ? get_long_size() : get_short_size();
        }
 
        [[nodiscard]] constexpr size_type length() const noexcept {
            return size();
        }
 
        [[nodiscard]] constexpr size_type max_size() const noexcept {
            // const size_type alignment = 16;
            // size_type m = allocator_traits::max_size(_allocator);
            // if (m <= std::numeric_limits<size_type>::max() / 2)
            //     return m - alignment;
            // else
            //=     return (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) ? m - alignment : (m / 2) - alignment;
            return (allocator_traits::max_size(_allocator) - 1) / 2;
        }
 
        [[nodiscard]] constexpr size_type capacity() const noexcept {
            return is_long() ? get_long_cap() : min_cap;
        }
 
        constexpr void reserve(size_type cap) {
            PLUGIFY_ASSERT(cap <= max_size(), "plg::basic_string::reserve(): allocated memory size would exceed max_size()", std::length_error);
            if (cap <= capacity())
                return;
 
            auto new_cap = std::max(cap, size());
            if (new_cap == capacity())
                return;
 
            grow_to(new_cap);
        }
 
        void reserve() {
            shrink_to_fit();
        }
 
        constexpr void shrink_to_fit() {
            if (is_long() == false)
                return;
 
            reallocate(size(), true);
        }
 
        constexpr void clear() noexcept {
            set_size(0);
        }
 
        constexpr basic_string& insert(size_type pos, size_type count, value_type ch) {
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::insert(): pos out of range", std::out_of_range);
            insert(std::next(cbegin(), pos), count, ch);
            return *this;
        }
 
        constexpr basic_string& insert(size_type pos, const value_type* str) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::insert(): pos out of range", std::out_of_range);
            auto len = Traits::length(str);
            PLUGIFY_ASSERT(size() + len <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            internal_insert(pos, str, len);
            return *this;
        }
 
        constexpr basic_string& insert(size_type pos, const value_type* str, size_type count) {
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::insert(): pos out of range", std::out_of_range);
            internal_insert(pos, str, count);
            return *this;
        }
 
        constexpr basic_string& insert(size_type pos, const basic_string& str) {
            PLUGIFY_ASSERT(size() + str.size() <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::insert(): pos out of range", std::out_of_range);
            internal_insert(pos, const_pointer(str.data()), str.size());
            return *this;
        }
 
        constexpr basic_string& insert(size_type pos, const basic_string& str, size_type pos_str, size_type count = npos) {
            PLUGIFY_ASSERT(pos <= size() && pos_str <= str.size(), "plg::basic_string::insert(): pos or pos_str out of range", std::out_of_range);
            count = std::min(count, str.length() - pos_str);
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            return insert(pos, str.data() + pos_str, count);
        }
 
        constexpr iterator insert(const_iterator pos, value_type ch) {
            return insert(pos, 1, ch);
        }
 
        constexpr iterator insert(const_iterator pos, size_type count, value_type ch) {
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            auto spos = std::distance(cbegin(), pos);
            internal_insert(spos, ch, count);
            return std::next(begin(), spos);
        }
 
        template<PLUGIFY_INPUT_ITERATOR InputIterator>
        constexpr iterator insert(const_iterator pos, InputIterator first, InputIterator last) {
            auto spos = std::distance(cbegin(), pos);
            auto len = static_cast<size_type>(std::distance(first, last));
            PLUGIFY_ASSERT(size() + len <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            internal_insert(spos, const_pointer(first), len);
            return std::next(begin(), spos);
        }
 
        constexpr iterator insert(const_iterator pos, std::initializer_list<value_type> list) {
            PLUGIFY_ASSERT(size() + list.size() <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            auto spos = std::distance(cbegin(), pos);
            internal_insert(spos, const_pointer(list.begin()), list.size());
            return std::next(begin(), spos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& insert(size_type pos, const Type& t) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::insert(): pos out of range", std::out_of_range);
            sview_type sv(t);
            PLUGIFY_ASSERT(size() + sv.length() <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            internal_insert(pos, const_pointer(sv.data()), sv.length());
            return *this;
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& insert(size_type pos, const Type& t, size_type pos_str, size_type count = npos) {
            auto sv = sview_type(t);
            PLUGIFY_ASSERT(pos <= size() && pos_str <= sv.length(), "plg::basic_string::insert(): pos or pos_str out of range", std::out_of_range);
            auto ssv = sv.substr(pos_str, count);
            PLUGIFY_ASSERT(size() + ssv.length() <= max_size(), "plg::basic_string::insert(): resulted string size would exceed max_size()", std::length_error);
            internal_insert(pos, const_pointer(ssv.data()), ssv.length());
            return *this;
        }
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
        template<detail::string_compatible_range<Char> Range>
        constexpr iterator insert_range(const_iterator pos, Range&& range) {
            auto str = basic_string(std::from_range, std::forward<Range>(range), _allocator);
            PLUGIFY_ASSERT(size() + str.size() <= max_size(), "plg::basic_string::insert_range(): resulted string size would exceed max_size()", std::length_error);
            return insert(pos - begin(), str);
        }
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
 
        constexpr basic_string& erase(size_type pos = 0, size_type count = npos) {
            auto sz = size();
            auto buffer = data();
 
            PLUGIFY_ASSERT(pos <= sz, "plg::basic_string::erase(): pos out of range", std::out_of_range);
 
            count = std::min(count, sz - pos);
 
            auto left = sz - (pos + count);
            if (left != 0)
                Traits::move(buffer + pos, buffer + pos + count, left);
 
            auto new_size = pos + left;
            set_size(new_size);
            null_terminate();
 
            return *this;
        }
 
        constexpr iterator erase(const_iterator position) {
            auto pos = std::distance(cbegin(), position);
            erase(pos, 1);
            return begin() + pos;
        }
 
        constexpr iterator erase(const_iterator first, const_iterator last) {
            auto pos = std::distance(cbegin(), first);
            auto len = std::distance(first, last);
            erase(pos, len);
            return begin() + pos;
        }
 
        constexpr void push_back(value_type ch) {
            PLUGIFY_ASSERT(size() + 1 <= max_size(), "plg::basic_string::push_back(): resulted string size would exceed max_size()", std::length_error);
            append(1, ch);
        }
 
        constexpr void pop_back() {
            erase(end() - 1);
        }
 
        constexpr basic_string& append(size_type count, value_type ch) {
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(ch, count);
            return *this;
        }
 
        constexpr basic_string& append(const basic_string& str) {
            PLUGIFY_ASSERT(size() + str.size() <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(str.data(), str.size());
            return *this;
        }
 
        constexpr basic_string& append(const basic_string& str, size_type pos, size_type count = npos) {
            PLUGIFY_ASSERT(pos <= str.size(), "plg::basic_string::append(): pos out of range", std::out_of_range);
            auto ssv = sview_type(str).substr(pos, count);
            PLUGIFY_ASSERT(size() + ssv.length() <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(ssv.data(), ssv.length());
            return *this;
        }
 
        constexpr basic_string& append(const value_type* str, size_type count) {
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(str, count);
            return *this;
        }
 
        constexpr basic_string& append(const value_type* str) {
            auto len = Traits::length(str);
            PLUGIFY_ASSERT(size() + len <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            return append(str, len);
        }
 
        template<PLUGIFY_INPUT_ITERATOR InputIterator>
        constexpr basic_string& append(InputIterator first, InputIterator last) {
            auto len = static_cast<size_type>(std::distance(first, last));
            PLUGIFY_ASSERT(size() + len <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(const_pointer(first), len);
            return *this;
        }
 
        constexpr basic_string& append(std::initializer_list<value_type> list) {
            PLUGIFY_ASSERT(size() + list.size() <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(const_pointer(list.begin()), list.size());
            return *this;
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& append(const Type& t) {
            sview_type sv(t);
            PLUGIFY_ASSERT(size() + sv.length() <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(sv.data(), sv.size());
            return *this;
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& append(const Type& t, size_type pos, size_type count = npos) {
            sview_type sv(t);
            PLUGIFY_ASSERT(pos <= sv.length(), "plg::basic_string::append(): pos out of range", std::out_of_range);
            auto ssv = sv.substr(pos, count);
            PLUGIFY_ASSERT(size() + ssv.length() <= max_size(), "plg::basic_string::append(): resulted string size would exceed max_size()", std::length_error);
            internal_append(ssv.data(), ssv.length());
            return *this;
        }
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
        template<detail::string_compatible_range<Char> Range>
        constexpr basic_string& append_range(Range&& range) {
            auto str = basic_string(std::from_range, std::forward<Range>(range), _allocator);
            PLUGIFY_ASSERT(size() + str.size() <= max_size(), "plg::basic_string::insert_range(): resulted string size would exceed max_size()", std::length_error);
            return append(str);
        }
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
 
        constexpr basic_string& operator+=(const basic_string& str) {
            return append(str);
        }
 
        constexpr basic_string& operator+=(value_type ch) {
            push_back(ch);
            return *this;
        }
 
        constexpr basic_string& operator+=(const value_type* str) {
            return append(str);
        }
 
        constexpr basic_string& operator+=(std::initializer_list<value_type> list) {
            return append(list);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& operator+=(const Type& t) {
            return append(sview_type(t));
        }
 
        [[nodiscard]] constexpr int compare(const basic_string& str) const noexcept {
            return view().compare(str.view());
        }
 
        [[nodiscard]] constexpr int compare(size_type pos1, size_type count1, const basic_string& str) const {
            return view().compare(pos1, count1, str.view());
        }
 
        [[nodiscard]] constexpr int compare(size_type pos1, size_type count1, const basic_string& str, size_type pos2, size_type count2 = npos) const {
            return view().compare(pos1, count1, str.view(), pos2, count2);
        }
 
        [[nodiscard]] constexpr int compare(const value_type* str) const {
            return view().compare(str);
        }
 
        [[nodiscard]] constexpr int compare(size_type pos1, size_type count1, const value_type* str) const {
            return view().compare(pos1, count1, str);
        }
 
        [[nodiscard]] constexpr int compare(size_type pos1, size_type count1, const value_type* str, size_type count2) const {
            return view().compare(pos1, count1, str, count2);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr int compare(const Type& t) const noexcept(noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type))) {
            return view().compare(sview_type(t));
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr int compare(size_type pos1, size_type count1, const Type& t) const {
            return view().compare(pos1, count1, sview_type(t));
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr int compare(size_type pos1, size_type count1, const Type& t, size_type pos2, size_type count2 = npos) const {
            return view().compare(pos1, count1, sview_type(t), pos2, count2);
        }
 
        [[nodiscard]] constexpr bool starts_with(sview_type sv) const noexcept {
            return view().starts_with(sv);
        }
 
        [[nodiscard]] constexpr bool starts_with(Char ch) const noexcept {
            return view().starts_with(ch);
        }
 
        [[nodiscard]] constexpr bool starts_with(const Char* str) const {
            return view().starts_with(str);
        }
 
        [[nodiscard]] constexpr bool ends_with(sview_type sv) const noexcept {
            return view().ends_with(sv);
        }
 
        [[nodiscard]] constexpr bool ends_with(Char ch) const noexcept {
            return view().ends_with(ch);
        }
 
        [[nodiscard]] constexpr bool ends_with(const Char* str) const {
            return view().ends_with(str);
        }
 
        [[nodiscard]] constexpr bool contains(sview_type sv) const noexcept {
            return view().contains(sv);
        }
 
        [[nodiscard]] constexpr bool contains(Char ch) const noexcept {
            return view().contains(ch);
        }
 
        [[nodiscard]] constexpr bool contains(const Char* str) const {
            return view().contains(str);
        }
 
        constexpr basic_string& replace(size_type pos, size_type count, const basic_string& str) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::replace(): pos out of range", std::out_of_range);
            return replace(pos, count, str, 0, str.length());
        }
 
        constexpr basic_string& replace(const_iterator first, const_iterator last, const basic_string& str) {
            auto pos = std::distance(cbegin(), first);
            auto count = std::distance(first, last);
            return replace(pos, count, str, 0, str.length());
        }
 
        constexpr basic_string& replace(size_type pos, size_type count, const basic_string& str, size_type pos2, size_type count2 = npos) {
            PLUGIFY_ASSERT(pos <= size() && pos2 <= str.size(), "plg::basic_string::replace(): pos or pos_str out of range", std::out_of_range);
            count2 = std::min(count2, str.length() - pos2);
            auto ssv = sview_type(str).substr(pos2, count2);
            return replace(pos, count, ssv.data(), ssv.length());
        }
 
        template<PLUGIFY_INPUT_ITERATOR InputIterator>
        constexpr basic_string& replace(const_iterator first, const_iterator last, InputIterator first2, InputIterator last2) {
            return replace(first, last, const_pointer(first2), std::distance(first2, last2));
        }
 
        constexpr basic_string& replace(size_type pos, size_type count, const value_type* str, size_type count2) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::replace(): pos out of range", std::out_of_range);
            count = std::min(count, length() - pos);
            PLUGIFY_ASSERT(size() - count + count2 <= max_size(), "plg::basic_string::replace(): resulted string size would exceed max_size()", std::length_error);
            internal_replace(pos, const_pointer(str), count, count2);
            return *this;
        }
 
        constexpr basic_string& replace(const_iterator first, const_iterator last, const value_type* str, size_type count2) {
            auto pos = std::distance(cbegin(), first);
            auto count = std::distance(first, last);
            return replace(pos, count, str, count2);
        }
 
        constexpr basic_string& replace(size_type pos, size_type count, const value_type* str) {
            return replace(pos, count, str, Traits::length(str));
        }
 
        constexpr basic_string& replace(const_iterator first, const_iterator last, const value_type* str) {
            return replace(first, last, str, Traits::length(str));
        }
 
        constexpr basic_string& replace(size_type pos, size_type count, size_type count2, value_type ch) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::replace(): pos out of range", std::out_of_range);
            count = std::min(count, length() - pos);
            PLUGIFY_ASSERT(size() - count + count2 <= max_size(), "plg::basic_string::replace(): resulted string size would exceed max_size()", std::length_error);
            internal_replace(pos, ch, count, count2);
            return *this;
        }
 
        constexpr basic_string& replace(const_iterator first, const_iterator last, size_type count2, value_type ch) {
            auto pos = std::distance(cbegin(), first);
            auto count = std::distance(first, last);
 
            PLUGIFY_ASSERT(size() - count + count2 <= max_size(), "plg::basic_string::replace(): resulted string size would exceed max_size()", std::length_error);
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::replace(): pos out of range", std::out_of_range);
            internal_replace(pos, ch, count, count2);
            return *this;
        }
 
        constexpr basic_string& replace(const_iterator first, const_iterator last, std::initializer_list<value_type> list) {
            return replace(first, last, const_pointer(list.begin()), list.size());
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& replace(size_type pos, size_type count, const Type& t) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::replace(): pos out of range", std::out_of_range);
            sview_type sv(t);
            return replace(pos, count, sv.data(), sv.length());
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& replace(const_iterator first, const_iterator last, const Type& t) {
            sview_type sv(t);
            return replace(first, last, sv.data(), sv.length());
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        constexpr basic_string& replace(size_type pos, size_type count, const Type& t, size_type pos2, size_type count2 = npos) {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::replace(): pos out of range", std::out_of_range);
            auto sv = sview_type(t).substr(pos2, count2);
            return replace(pos, count, sv.data(), sv.length());
        }
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
        template<detail::string_compatible_range<Char> Range>
        constexpr iterator replace_with_range(const_iterator first, const_iterator last, Range&& range) {
            auto str = basic_string(std::from_range, std::forward<Range>(range), _allocator);
            return replace(first, last, str);// replace checks for max_size()
        }
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
 
        [[nodiscard]] constexpr basic_string substr(size_type pos = 0, size_type count = npos) const {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::substr(): pos out of range", std::out_of_range);
            return basic_string(*this, pos, count);
        }
 
        constexpr size_type copy(value_type* str, size_type count, size_type pos = 0) const {
            PLUGIFY_ASSERT(pos <= size(), "plg::basic_string::copy(): pos out of range", std::out_of_range);
            return view().copy(str, count, pos);
        }
 
        constexpr void resize(size_type count, value_type ch) {
            PLUGIFY_ASSERT(size() + count <= max_size(), "plg::basic_string::resize(): resulted string size would exceed max_size()", std::length_error);
            auto cap = capacity();
            auto sz = size();
            auto rsz = count + sz;
 
            if (sz < rsz) {
                if (cap < rsz)
                    grow_to(rsz);
                Traits::assign(data() + sz, count, ch);
            }
            set_size(rsz);
            null_terminate();
        }
 
        constexpr void resize(size_type count) {
            resize(count, _terminator);
        }
 
        template<typename Operation>
        constexpr void resize_and_overwrite(size_type, Operation) {
            static_assert(detail::dependent_false<Char>, "plg::basic_string::resize_and_overwrite(count, op) not implemented!");
        }
 
        constexpr void swap(basic_string& other) noexcept(allocator_traits::propagate_on_container_swap::value || allocator_traits::is_always_equal::value) {
            using std::swap;
            if constexpr (allocator_traits::propagate_on_container_swap::value) {
                swap(_allocator, other._allocator);
            }
            swap(_storage, other._storage);
        }
 
        [[nodiscard]] constexpr size_type find(const basic_string& str, size_type pos = 0) const noexcept {
            return view().find(sview_type(str), pos);
        }
 
        [[nodiscard]] constexpr size_type find(const value_type* str, size_type pos, size_type count) const noexcept {
            return view().find(str, pos, count);
        }
 
        [[nodiscard]] constexpr size_type find(const value_type* str, size_type pos = 0) const noexcept {
            return view().find(str, pos);
        }
 
        [[nodiscard]] constexpr size_type find(value_type ch, size_type pos = 0) const noexcept {
            return view().find(ch, pos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr size_type find(const Type& t, size_type pos = 0) const noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type)) {
            return view().find(sview_type(t), pos);
        }
 
        [[nodiscard]] constexpr size_type rfind(const basic_string& str, size_type pos = npos) const noexcept {
            return view().rfind(sview_type(str), pos);
        }
 
        [[nodiscard]] constexpr size_type rfind(const value_type* str, size_type pos, size_type count) const noexcept {
            return view().rfind(str, pos, count);
        }
 
        [[nodiscard]] constexpr size_type rfind(const value_type* str, size_type pos = npos) const noexcept {
            return view().rfind(str, pos);
        }
 
        [[nodiscard]] constexpr size_type rfind(value_type ch, size_type pos = npos) const noexcept {
            return view().rfind(ch, pos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr size_type rfind(const Type& t, size_type pos = npos) const noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type)) {
            return view().rfind(sview_type(t), pos);
        }
 
        [[nodiscard]] constexpr size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept {
            return view().find_first_of(sview_type(str), pos);
        }
 
        [[nodiscard]] constexpr size_type find_first_of(const value_type* str, size_type pos, size_type count) const noexcept {
            return view().find_first_of(str, pos, count);
        }
 
        [[nodiscard]] constexpr size_type find_first_of(const value_type* str, size_type pos = 0) const noexcept {
            return view().find_first_of(str, pos);
        }
 
        [[nodiscard]] constexpr size_type find_first_of(value_type ch, size_type pos = 0) const noexcept {
            return view().find_first_of(ch, pos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr size_type find_first_of(const Type& t, size_type pos = 0) const noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type)) {
            return view().find_first_of(sview_type(t), pos);
        }
 
        [[nodiscard]] constexpr size_type find_first_not_of(const basic_string& str, size_type pos = 0) const noexcept {
            return view().find_last_not_of(sview_type(str), pos);
        }
 
        [[nodiscard]] constexpr size_type find_first_not_of(const value_type* str, size_type pos, size_type count) const noexcept {
            return view().find_last_not_of(str, pos, count);
        }
 
        [[nodiscard]] constexpr size_type find_first_not_of(const value_type* str, size_type pos = 0) const noexcept {
            return view().find_last_not_of(str, pos);
        }
 
        [[nodiscard]] constexpr size_type find_first_not_of(value_type ch, size_type pos = 0) const noexcept {
            return view().find_first_not_of(ch, pos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr size_type find_first_not_of(const Type& t, size_type pos = 0) const noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type)) {
            return view().find_first_not_of(sview_type(t), pos);
        }
 
        [[nodiscard]] constexpr size_type find_last_of(const basic_string& str, size_type pos = npos) const noexcept {
            return view().find_last_of(sview_type(str), pos);
        }
 
        [[nodiscard]] constexpr size_type find_last_of(const value_type* str, size_type pos, size_type count) const noexcept {
            return view().find_last_of(str, pos, count);
        }
 
        [[nodiscard]] constexpr size_type find_last_of(const value_type* str, size_type pos = npos) const noexcept {
            return view().find_last_of(str, pos);
        }
 
        [[nodiscard]] constexpr size_type find_last_of(value_type ch, size_type pos = npos) const noexcept {
            return view().find_last_of(ch, pos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr size_type find_last_of(const Type& t, size_type pos = npos) const noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type)) {
            return view().find_last_of(sview_type(t), pos);
        }
 
        [[nodiscard]] constexpr size_type find_last_not_of(const basic_string& str, size_type pos = npos) const noexcept {
            return view().find_last_not_of(sview_type(str), pos);
        }
 
        [[nodiscard]] constexpr size_type find_last_not_of(const value_type* str, size_type pos, size_type count) const noexcept {
            return view().find_last_not_of(str, pos, count);
        }
 
        [[nodiscard]] constexpr size_type find_last_not_of(const value_type* str, size_type pos = npos) const noexcept {
            return view().find_last_not_of(str, pos);
        }
 
        [[nodiscard]] constexpr size_type find_last_not_of(value_type ch, size_type pos = npos) const noexcept {
            return view().find_last_not_of(ch, pos);
        }
 
        template<typename Type>
#ifdef __cpp_concepts
            requires(std::is_convertible_v<const Type&, sview_type> &&
                     !std::is_convertible_v<const Type&, const Char*>)
#endif // __cpp_concepts
        [[nodiscard]] constexpr size_type find_last_not_of(const Type& t, size_type pos = npos) const noexcept(PLUGIFY_NOTTHROW_CONVERTIBLE(const Type&, sview_type)) {
            return view().find_last_not_of(sview_type(t), pos);
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(const basic_string& lhs, const basic_string& rhs) {
            auto lhs_sz = lhs.size();
            auto rhs_sz = rhs.size();
            basic_string ret(detail::uninitialized_size_tag(), lhs_sz + rhs_sz, basic_string::allocator_traits::select_on_container_copy_construction(lhs._allocator));
            auto buffer = ret.data();
            Traits::copy(buffer, lhs.data(), lhs_sz);
            Traits::copy(buffer + lhs_sz, rhs.data(), rhs_sz);
            ret.null_terminate();
            return ret;
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(basic_string&& lhs, const basic_string& rhs) {
            return std::move(lhs.append(rhs));
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(const basic_string& lhs, basic_string&& rhs) {
            return std::move(rhs.insert(0, lhs));
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(basic_string&& lhs, basic_string&& rhs) {
            return std::move(lhs.append(rhs));
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(const Char* lhs, const basic_string& rhs) {
            auto lhs_sz = Traits::length(lhs);
            auto rhs_sz = rhs.size();
            basic_string ret(detail::uninitialized_size_tag(), lhs_sz + rhs_sz, basic_string::allocator_traits::select_on_container_copy_construction(rhs._allocator));
            auto buffer = ret.data();
            Traits::copy(buffer, lhs, lhs_sz);
            Traits::copy(buffer + lhs_sz, rhs.data(), rhs_sz);
            ret.null_terminate();
            return ret;
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(const Char* lhs, basic_string&& rhs) {
            return std::move(rhs.insert(0, lhs));
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(Char lhs, const basic_string& rhs) {
            auto rhs_sz = rhs.size();
            basic_string ret(detail::uninitialized_size_tag(), rhs_sz + 1, basic_string::allocator_traits::select_on_container_copy_construction(rhs._allocator));
            auto buffer = ret.data();
            Traits::assign(buffer, 1, lhs);
            Traits::copy(buffer + 1, rhs.data(), rhs_sz);
            ret.null_terminate();
            return ret;
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(Char lhs, basic_string&& rhs) {
            rhs.insert(rhs.begin(), lhs);
            return std::move(rhs);
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(const basic_string& lhs, const Char* rhs) {
            auto lhs_sz = lhs.size();
            auto rhs_sz = Traits::length(rhs);
            basic_string ret(detail::uninitialized_size_tag(), lhs_sz + rhs_sz, basic_string::allocator_traits::select_on_container_copy_construction(lhs._allocator));
            auto buffer = ret.data();
            Traits::copy(buffer, lhs.data(), lhs_sz);
            Traits::copy(buffer + lhs_sz, rhs, rhs_sz);
            ret.null_terminate();
            return ret;
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(basic_string&& lhs, const Char* rhs) {
            return std::move(lhs.append(rhs));
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(const basic_string& lhs, Char rhs) {
            auto lhs_sz = lhs.size();
            basic_string ret(detail::uninitialized_size_tag(), lhs_sz + 1, basic_string::allocator_traits::select_on_container_copy_construction(lhs._allocator));
            auto buffer = ret.data();
            Traits::copy(buffer, lhs.data(), lhs_sz);
            Traits::assign(buffer + lhs_sz, 1, rhs);
            ret.null_terminate();
            return ret;
        }
 
        [[nodiscard]] friend constexpr basic_string operator+(basic_string&& lhs, Char rhs) {
            lhs.push_back(rhs);
            return std::move(lhs);
        }
    };
 
    template<typename Char, typename Traits, typename Allocator>
    [[nodiscard]] constexpr bool operator==(const basic_string<Char, Traits, Allocator>& lhs, const basic_string<Char, Traits, Allocator>& rhs) noexcept {
        return lhs.compare(rhs) == 0;
    }
 
    template<typename Char, typename Traits, typename Allocator>
    [[nodiscard]] constexpr bool operator==(const basic_string<Char, Traits, Allocator>& lhs, const Char* rhs) {
        return lhs.compare(rhs) == 0;
    }
 
#if __cpp_impl_three_way_comparison
    template<typename Char, typename Traits, typename Allocator>
    [[nodiscard]] constexpr std::strong_ordering operator<=>(const basic_string<Char, Traits, Allocator>& lhs, const basic_string<Char, Traits, Allocator>& rhs) noexcept {
        return lhs.compare(rhs) <=> 0;
    }
 
    template<typename Char, typename Traits, typename Allocator>
    [[nodiscard]] constexpr std::strong_ordering operator<=>(const basic_string<Char, Traits, Allocator>& lhs, const Char* rhs) {
        return lhs.compare(rhs) <=> 0;
    }
#endif // __cpp_impl_three_way_comparison
 
    // swap
    template<typename Char, typename Traits, typename Allocator>
    constexpr void swap(basic_string<Char, Traits, Allocator>& lhs, basic_string<Char, Traits, Allocator>& rhs) noexcept(noexcept(lhs.swap(rhs))) {
        lhs.swap(rhs);
    }
 
    // erasure
    template<typename Char, typename Traits, typename Allocator, typename U>
    constexpr typename basic_string<Char, Traits, Allocator>::size_type erase(basic_string<Char, Traits, Allocator>& c, const U& value) {
        auto it = std::remove(c.begin(), c.end(), value);
        auto r = std::distance(it, c.end());
        c.erase(it, c.end());
        return r;
    }
 
    template<typename Char, typename Traits, typename Allocator, typename Pred>
    constexpr typename basic_string<Char, Traits, Allocator>::size_type erase_if(basic_string<Char, Traits, Allocator>& c, Pred pred) {
        auto it = std::remove_if(c.begin(), c.end(), pred);
        auto r = std::distance(it, c.end());
        c.erase(it, c.end());
        return r;
    }
 
    // deduction guides
    template<typename InputIterator, typename Allocator = std::allocator<typename std::iterator_traits<InputIterator>::value_type>>
    basic_string(InputIterator, InputIterator, Allocator = Allocator()) -> basic_string<typename std::iterator_traits<InputIterator>::value_type, std::char_traits<typename std::iterator_traits<InputIterator>::value_type>, Allocator>;
 
    template<typename Char, typename Traits, typename Allocator = std::allocator<Char>>
    explicit basic_string(std::basic_string_view<Char, Traits>, const Allocator& = Allocator()) -> basic_string<Char, Traits, Allocator>;
 
    template<typename Char, typename Traits, typename Allocator = std::allocator<Char>>
    basic_string(std::basic_string_view<Char, Traits>, typename basic_string<Char, Traits, Allocator>::size_type, typename basic_string<Char, Traits, Allocator>::size_type, const Allocator& = Allocator()) -> basic_string<Char, Traits, Allocator>;
 
#if PLUGIFY_STRING_CONTAINERS_RANGES
    template<std::ranges::input_range Range, typename Allocator = std::allocator<std::ranges::range_value_t<Range>>>
    basic_string(std::from_range_t, Range&&, Allocator = Allocator()) -> basic_string<std::ranges::range_value_t<Range>, std::char_traits<std::ranges::range_value_t<Range>>, Allocator>;
#endif // PLUGIFY_STRING_CONTAINERS_RANGES
 
    // basic_string typedef-names
    using string = basic_string<char>;
    using u8string = basic_string<char8_t>;
    using u16string = basic_string<char16_t>;
    using u32string = basic_string<char32_t>;
    using wstring = basic_string<wchar_t>;
 
#ifndef PLUGIFY_STRING_NO_NUMERIC_CONVERSIONS
    // numeric conversions
    [[nodiscard]] inline int stoi(const string& str, std::size_t* pos = nullptr, int base = 10) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtol(cstr, &ptr, base);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return static_cast<int>(ret);
    }
 
    [[nodiscard]] inline long stol(const string& str, std::size_t* pos = nullptr, int base = 10) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtol(cstr, &ptr, base);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    [[nodiscard]] inline long long stoll(const string& str, std::size_t* pos = nullptr, int base = 10) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtoll(cstr, &ptr, base);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    [[nodiscard]] inline unsigned long stoul(const string& str, std::size_t* pos = nullptr, int base = 10) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtoul(cstr, &ptr, base);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    [[nodiscard]] inline unsigned long long stoull(const string& str, std::size_t* pos = nullptr, int base = 10) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtoull(cstr, &ptr, base);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    [[nodiscard]] inline float stof(const string& str, std::size_t* pos = nullptr) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtof(cstr, &ptr);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    [[nodiscard]] inline double stod(const string& str, std::size_t* pos = nullptr) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtod(cstr, &ptr);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    [[nodiscard]] inline long double stold(const string& str, std::size_t* pos = nullptr) {
        auto cstr = str.c_str();
        char* ptr = const_cast<char*>(cstr);
 
        auto ret = strtold(cstr, &ptr);
        if (pos != nullptr)
            *pos = static_cast<size_t>(cstr - ptr);
 
        return ret;
    }
 
    namespace detail {
        template<typename S, typename V>
        PLUGIFY_FORCE_INLINE constexpr S to_string(V v) {
            //  numeric_limits::digits10 returns value less on 1 than desired for unsigned numbers.
            //  For example, for 1-byte unsigned value digits10 is 2 (999 can not be represented),
            //  so we need +1 here.
            constexpr std::size_t bufSize = std::numeric_limits<V>::digits10 + 2; // +1 for minus, +1 for digits10
            char buf[bufSize];
            const auto res = std::to_chars(buf, buf + bufSize, v);
            return S(buf, res.ptr);
        }
 
        typedef int (*wide_printf)(wchar_t* __restrict, std::size_t, const wchar_t* __restrict, ...);
 
#if defined(_MSC_VER)
        inline int truncate_snwprintf(wchar_t* __restrict buffer, std::size_t count, const wchar_t* __restrict format, ...) {
            int r;
            va_list args;
            va_start(args, format);
            r = _vsnwprintf_s(buffer, count, _TRUNCATE, format, args);
            va_end(args);
            return r;
        }
#endif
 
        PLUGIFY_FORCE_INLINE constexpr wide_printf get_swprintf() noexcept {
#if defined(_MSC_VER)
            return static_cast<int(__cdecl*)(wchar_t* __restrict, std::size_t, const wchar_t* __restrict, ...)>(truncate_snwprintf);
#else
            return swprintf;
#endif
        }
 
        template<typename S, typename P, typename V>
        PLUGIFY_FORCE_INLINE constexpr S as_string(P sprintf_like, const typename S::value_type* fmt, V v) {
            typedef typename S::size_type size_type;
            S s;
            s.resize(s.capacity());
            size_type available = s.size();
            while (true) {
                int status = sprintf_like(&s[0], available + 1, fmt, v);
                if (status >= 0) {
                    auto used = static_cast<size_type>(status);
                    if (used <= available) {
                        s.resize(used);
                        break;
                    }
                    available = used; // Assume this is advice of how much space we need.
                } else {
                    available = available * 2 + 1;
                }
                s.resize(available);
            }
            return s;
        }
    }// namespace detail
 
    [[nodiscard]] inline string to_string(int val) { return detail::to_string<string>(val); }
    [[nodiscard]] inline string to_string(unsigned val) { return detail::to_string<string>(val); }
    [[nodiscard]] inline string to_string(long val) { return detail::to_string<string>(val); }
    [[nodiscard]] inline string to_string(unsigned long val) { return detail::to_string<string>(val); }
    [[nodiscard]] inline string to_string(long long val) { return detail::to_string<string>(val); }
    [[nodiscard]] inline string to_string(unsigned long long val) { return detail::to_string<string>(val); }
    [[nodiscard]] inline string to_string(float val) { return detail::as_string<string>(snprintf, "%f", val); }
    [[nodiscard]] inline string to_string(double val) { return detail::as_string<string>(snprintf, "%f", val); }
    [[nodiscard]] inline string to_string(long double val) { return detail::as_string<string>(snprintf, "%Lf", val); }
 
    [[nodiscard]] inline wstring to_wstring(int val) { return detail::to_string<wstring>(val); }
    [[nodiscard]] inline wstring to_wstring(unsigned val) { return detail::to_string<wstring>(val); }
    [[nodiscard]] inline wstring to_wstring(long val) { return detail::to_string<wstring>(val); }
    [[nodiscard]] inline wstring to_wstring(unsigned long val) { return detail::to_string<wstring>(val); }
    [[nodiscard]] inline wstring to_wstring(long long val) { return detail::to_string<wstring>(val); }
    [[nodiscard]] inline wstring to_wstring(unsigned long long val) { return detail::to_string<wstring>(val); }
    [[nodiscard]] inline wstring to_wstring(float val) { return detail::as_string<wstring>(detail::get_swprintf(), L"%f", val); }
    [[nodiscard]] inline wstring to_wstring(double val) { return detail::as_string<wstring>(detail::get_swprintf(), L"%f", val); }
    [[nodiscard]] inline wstring to_wstring(long double val) { return detail::as_string<wstring>(detail::get_swprintf(), L"%Lf", val); }
#endif // PLUGIFY_STRING_NO_NUMERIC_CONVERSIONS
 
#ifndef PLUGIFY_STRING_NO_STD_HASH
    // hash support
    namespace detail {
        template<typename Char, typename Allocator, typename String = basic_string<Char, std::char_traits<Char>, Allocator>>
        struct string_hash_base {
            [[nodiscard]] constexpr std::size_t operator()(const String& str) const noexcept {
                return std::hash<typename String::sview_type>{}(typename String::sview_type(str));
            }
        };
    }// namespace detail
#endif // PLUGIFY_STRING_NO_STD_HASH
 
#ifndef PLUGIFY_STRING_NO_STD_FORMAT
    // format support
    namespace detail {
        template<typename Char>
        static constexpr const Char* format_string() {
            if constexpr (std::is_same_v<Char, char> || std::is_same_v<Char, char8_t>)
                return "{}";
            if constexpr (std::is_same_v<Char, wchar_t>)
                return L"{}";
            if constexpr (std::is_same_v<Char, char16_t>)
                return u"{}";
            if constexpr (std::is_same_v<Char, char32_t>)
                return U"{}";
            return "";
        }
 
        template<typename Char, typename Allocator, typename String = basic_string<Char, std::char_traits<Char>, Allocator>>
        struct string_formatter_base {
            constexpr auto parse(std::format_parse_context& ctx) {
                return ctx.begin();
            }
 
            template<class FormatContext>
            auto format(const String& str, FormatContext& ctx) const {
                return std::format_to(ctx.out(), format_string<Char>(), str.c_str());
            }
        };
    }
#endif // PLUGIFY_STRING_NO_STD_FORMAT
 
    inline namespace literals {
        inline namespace string_literals {
            PLUGIFY_WARN_PUSH()
 
#if defined(__clang__)
            PLUGIFY_WARN_IGNORE("-Wuser-defined-literals")
#elif defined(__GNUC__)
            PLUGIFY_WARN_IGNORE("-Wliteral-suffix")
#elif defined(_MSC_VER)
            PLUGIFY_WARN_IGNORE(4455)
#endif
            // suffix for basic_string literals
            [[nodiscard]] inline string operator""s(const char* str, std::size_t len) { return string{str, len}; }
#ifdef __cpp_char8_t
            [[nodiscard]] inline u8string operator""s(const char8_t* str, std::size_t len) { return u8string{str, len}; }
#endif // __cpp_char8_t
            [[nodiscard]] inline u16string operator""s(const char16_t* str, std::size_t len) { return u16string{str, len}; }
            [[nodiscard]] inline u32string operator""s(const char32_t* str, std::size_t len) { return u32string{str, len}; }
            [[nodiscard]] inline wstring operator""s(const wchar_t* str, std::size_t len) { return wstring{str, len}; }
 
            PLUGIFY_WARN_POP()
        }// namespace string_literals
    }// namespace literals
}// namespace plg
 
#ifndef PLUGIFY_STRING_NO_STD_HASH
// hash support
namespace std {
    template<typename Allocator>
    struct hash<plg::basic_string<char, std::char_traits<char>, Allocator>> : plg::detail::string_hash_base<char, Allocator> {};
 
    template<typename Allocator>
    struct hash<plg::basic_string<char8_t, std::char_traits<char8_t>, Allocator>> : plg::detail::string_hash_base<char8_t, Allocator> {};
 
    template<typename Allocator>
    struct hash<plg::basic_string<char16_t, std::char_traits<char16_t>, Allocator>> : plg::detail::string_hash_base<char16_t, Allocator> {};
 
    template<typename Allocator>
    struct hash<plg::basic_string<char32_t, std::char_traits<char32_t>, Allocator>> : plg::detail::string_hash_base<char32_t, Allocator> {};
 
    template<typename Allocator>
    struct hash<plg::basic_string<wchar_t, std::char_traits<wchar_t>, Allocator>> : plg::detail::string_hash_base<wchar_t, Allocator> {};
}// namespace std
#endif // PLUGIFY_STRING_NO_STD_HASH
 
#ifndef PLUGIFY_STRING_NO_STD_FORMAT
// format support
#ifdef FMT_HEADER_ONLY
namespace fmt {
#else
namespace std {
#endif
    template<typename Allocator>
    struct formatter<plg::basic_string<char, std::char_traits<char>, Allocator>> : plg::detail::string_formatter_base<char, Allocator> {};
 
    template<typename Allocator>
    struct formatter<plg::basic_string<char8_t, std::char_traits<char8_t>, Allocator>> : plg::detail::string_formatter_base<char8_t, Allocator> {};
 
    template<typename Allocator>
    struct formatter<plg::basic_string<char16_t, std::char_traits<char16_t>, Allocator>> : plg::detail::string_formatter_base<char16_t, Allocator> {};
 
    template<typename Allocator>
    struct formatter<plg::basic_string<char32_t, std::char_traits<char32_t>, Allocator>> : plg::detail::string_formatter_base<char32_t, Allocator> {};
 
    template<typename Allocator>
    struct formatter<plg::basic_string<wchar_t, std::char_traits<wchar_t>, Allocator>> : plg::detail::string_formatter_base<wchar_t, Allocator> {};
}// namespace std
#endif // PLUGIFY_STRING_NO_STD_FORMAT