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// -*- C++ -*-
//===--------------------------- format -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_FORMAT
#define _LIBCPP_FORMAT
/*
namespace std {
// [format.context], class template basic_format_context
template<class Out, class charT>
class basic_format_context {
basic_format_args<basic_format_context> args_; // exposition only
Out out_; // exposition only
public:
using iterator = Out;
using char_type = charT;
template<class T> using formatter_type = formatter<T, charT>;
basic_format_arg<basic_format_context> arg(size_t id) const;
std::locale locale();
iterator out();
void advance_to(iterator it);
};
using format_context = basic_format_context<unspecified, char>;
using wformat_context = basic_format_context<unspecified, wchar_t>;
// [format.args], class template basic_format_args
template<class Context>
class basic_format_args {
size_t size_; // exposition only
const basic_format_arg<Context>* data_; // exposition only
public:
basic_format_args() noexcept;
template<class... Args>
basic_format_args(const format-arg-store<Context, Args...>& store) noexcept;
basic_format_arg<Context> get(size_t i) const noexcept;
};
using format_args = basic_format_args<format_context>;
using wformat_args = basic_format_args<wformat_context>;
template<class Out, class charT>
using format_args_t = basic_format_args<basic_format_context<Out, charT>>;
// [format.functions], formatting functions
template<class... Args>
string format(string_view fmt, const Args&... args);
template<class... Args>
wstring format(wstring_view fmt, const Args&... args);
template<class... Args>
string format(const locale& loc, string_view fmt, const Args&... args);
template<class... Args>
wstring format(const locale& loc, wstring_view fmt, const Args&... args);
string vformat(string_view fmt, format_args args);
wstring vformat(wstring_view fmt, wformat_args args);
string vformat(const locale& loc, string_view fmt, format_args args);
wstring vformat(const locale& loc, wstring_view fmt, wformat_args args);
template<class Out, class... Args>
Out format_to(Out out, string_view fmt, const Args&... args);
template<class Out, class... Args>
Out format_to(Out out, wstring_view fmt, const Args&... args);
template<class Out, class... Args>
Out format_to(Out out, const locale& loc, string_view fmt, const Args&... args);
template<class Out, class... Args>
Out format_to(Out out, const locale& loc, wstring_view fmt, const Args&... args);
template<class Out>
Out vformat_to(Out out, string_view fmt,
format_args_t<type_identity_t<Out>, char> args);
template<class Out>
Out vformat_to(Out out, wstring_view fmt,
format_args_t<type_identity_t<Out>, wchar_t> args);
template<class Out>
Out vformat_to(Out out, const locale& loc, string_view fmt,
format_args_t<type_identity_t<Out>, char> args);
template<class Out>
Out vformat_to(Out out, const locale& loc, wstring_view fmt,
format_args_t<type_identity_t<Out>, wchar_t> args);
template<class Out> struct format_to_n_result {
Out out;
iter_difference_t<Out> size;
};
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
string_view fmt, const Args&... args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
wstring_view fmt, const Args&... args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
const locale& loc, string_view fmt,
const Args&... args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
const locale& loc, wstring_view fmt,
const Args&... args);
template<class... Args>
size_t formatted_size(string_view fmt, const Args&... args);
template<class... Args>
size_t formatted_size(wstring_view fmt, const Args&... args);
template<class... Args>
size_t formatted_size(const locale& loc, string_view fmt, const Args&... args);
template<class... Args>
size_t formatted_size(const locale& loc, wstring_view fmt, const Args&... args);
// [format.formatter], formatter
template<> struct formatter<char, char>;
template<> struct formatter<char, wchar_t>;
template<> struct formatter<wchar_t, wchar_t>;
template<> struct formatter<charT*, charT>;
template<> struct formatter<const charT*, charT>;
template<size_t N> struct formatter<const charT[N], charT>;
template<class traits, class Allocator>
struct formatter<basic_string<charT, traits, Allocator>, charT>;
template<class traits>
struct formatter<basic_string_view<charT, traits>, charT>;
// [format.parse.ctx], class template basic_format_parse_context
template<class charT>
class basic_format_parse_context {
public:
using char_type = charT;
using const_iterator = typename basic_string_view<charT>::const_iterator;
using iterator = const_iterator;
private:
iterator begin_; // exposition only
iterator end_; // exposition only
enum indexing { unknown, manual, automatic }; // exposition only
indexing indexing_; // exposition only
size_t next_arg_id_; // exposition only
size_t num_args_; // exposition only
public:
constexpr explicit basic_format_parse_context(basic_string_view<charT> fmt,
size_t num_args = 0) noexcept;
basic_format_parse_context(const basic_format_parse_context&) = delete;
basic_format_parse_context& operator=(const basic_format_parse_context&) = delete;
constexpr const_iterator begin() const noexcept;
constexpr const_iterator end() const noexcept;
constexpr void advance_to(const_iterator it);
constexpr size_t next_arg_id();
constexpr void check_arg_id(size_t id);
};
using format_parse_context = basic_format_parse_context<char>;
using wformat_parse_context = basic_format_parse_context<wchar_t>;
// [format.arguments], arguments
// [format.arg], class template basic_format_arg
template<class Context>
class basic_format_arg {
public:
class handle;
private:
using char_type = typename Context::char_type; // exposition only
variant<monostate, bool, char_type,
int, unsigned int, long long int, unsigned long long int,
float, double, long double,
const char_type*, basic_string_view<char_type>,
const void*, handle> value; // exposition only
template<class T> explicit basic_format_arg(const T& v) noexcept; // exposition only
explicit basic_format_arg(float n) noexcept; // exposition only
explicit basic_format_arg(double n) noexcept; // exposition only
explicit basic_format_arg(long double n) noexcept; // exposition only
explicit basic_format_arg(const char_type* s); // exposition only
template<class traits>
explicit basic_format_arg(
basic_string_view<char_type, traits> s) noexcept; // exposition only
template<class traits, class Allocator>
explicit basic_format_arg(
const basic_string<char_type, traits, Allocator>& s) noexcept; // exposition only
explicit basic_format_arg(nullptr_t) noexcept; // exposition only
template<class T>
explicit basic_format_arg(const T* p) noexcept; // exposition only
public:
basic_format_arg() noexcept;
explicit operator bool() const noexcept;
};
template<class Visitor, class Context>
see below visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg);
// [format.arg.store], class template format-arg-store
template<class Context, class... Args>
struct format-arg-store { // exposition only
array<basic_format_arg<Context>, sizeof...(Args)> args;
};
template<class Context = format_context, class... Args>
format-arg-store<Context, Args...>
make_format_args(const Args&... args);
template<class... Args>
format-arg-store<wformat_context, Args...>
make_wformat_args(const Args&... args);
// [format.error], class format_error
class format_error : public runtime_error {
public:
explicit format_error(const string& what_arg);
explicit format_error(const char* what_arg);
};
// [format.parse.ctx], class template basic_format_parse_context
template<class charT>
class basic_format_parse_context {
public:
using char_type = charT;
using const_iterator = typename basic_string_view<charT>::const_iterator;
using iterator = const_iterator;
private:
iterator begin_; // exposition only
iterator end_; // exposition only
enum indexing { unknown, manual, automatic }; // exposition only
indexing indexing_; // exposition only
size_t next_arg_id_; // exposition only
size_t num_args_; // exposition only
public:
constexpr explicit basic_format_parse_context(basic_string_view<charT> fmt,
size_t num_args = 0) noexcept;
basic_format_parse_context(const basic_format_parse_context&) = delete;
basic_format_parse_context& operator=(const basic_format_parse_context&) = delete;
constexpr const_iterator begin() const noexcept;
constexpr const_iterator end() const noexcept;
constexpr void advance_to(const_iterator it);
constexpr size_t next_arg_id();
constexpr void check_arg_id(size_t id);
};
using format_parse_context = basic_format_parse_context<char>;
using wformat_parse_context = basic_format_parse_context<wchar_t>;
}
*/
// Make sure all feature-test macros are available.
#include <version>
// Enable the contents of the header only when libc++ was built with LIBCXX_ENABLE_INCOMPLETE_FEATURES.
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
#include <__config>
#include <__debug>
#include <__format/format_arg.h>
#include <__format/format_args.h>
#include <__format/format_context.h>
#include <__format/format_error.h>
#include <__format/format_parse_context.h>
#include <__format/format_string.h>
#include <__format/parser_std_format_spec.h>
#include <__format/formatter.h>
#include <__variant/monostate.h>
#include <array>
#include <concepts>
#include <string>
#include <string_view>
#include <type_traits>
#ifndef _LIBCPP_HAS_NO_LOCALIZATION
#include <locale>
#endif
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER > 17
// TODO FMT Remove this once we require compilers with proper C++20 support.
// If the compiler has no concepts support, the format header will be disabled.
// Without concepts support enable_if needs to be used and that too much effort
// to support compilers with partial C++20 support.
#if !defined(_LIBCPP_HAS_NO_CONCEPTS)
// TODO FMT Evaluate which templates should be external templates. This
// improves the efficiency of the header. However since the header is still
// under heavy development and not all classes are stable it makes no sense
// to do this optimization now.
using format_args = basic_format_args<format_context>;
using wformat_args = basic_format_args<wformat_context>;
template <class _OutIt, class _CharT>
using format_args_t = basic_format_args<basic_format_context<_OutIt, _CharT>>;
template <class _Context, class... _Args>
struct _LIBCPP_TEMPLATE_VIS __format_arg_store {
// TODO FMT Use a built-in array.
array<basic_format_arg<_Context>, sizeof...(_Args)> __args;
};
template <class _Context = format_context, class... _Args>
_LIBCPP_HIDE_FROM_ABI __format_arg_store<_Context, _Args...>
make_format_args(const _Args&... __args) {
return {basic_format_arg<_Context>(__args)...};
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI __format_arg_store<wformat_context, _Args...>
make_wformat_args(const _Args&... __args) {
return _VSTD::make_format_args<wformat_context>(__args...);
}
namespace __format {
template <class _Tp, class _CharT>
struct _LIBCPP_TEMPLATE_VIS __formatter_char {
_LIBCPP_HIDE_FROM_ABI
auto parse(auto& __parse_ctx) -> decltype(__parse_ctx.begin()) {
// TODO FMT Implement this function.
return __parse_ctx.begin();
}
_LIBCPP_HIDE_FROM_ABI
auto format(_Tp __c, auto& __ctx) -> decltype(__ctx.out()) {
// TODO FMT Implement the parsed formatting arguments.
auto __out_it = __ctx.out();
*__out_it++ = _CharT(__c);
return __out_it;
}
};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS __formatter_c_string {
_LIBCPP_HIDE_FROM_ABI
auto parse(auto& __parse_ctx) -> decltype(__parse_ctx.begin()) {
// TODO FMT Implement this function.
return __parse_ctx.begin();
}
_LIBCPP_HIDE_FROM_ABI
auto format(const _CharT* __str, auto& __ctx) -> decltype(__ctx.out()) {
// TODO FMT Implement the parsed formatting arguments.
auto __out_it = __ctx.out();
while (*__str)
*__out_it++ = *__str++;
return __out_it;
}
};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS __formatter_string {
_LIBCPP_HIDE_FROM_ABI
auto parse(auto& __parse_ctx) -> decltype(__parse_ctx.begin()) {
// TODO FMT Implement this function.
return __parse_ctx.begin();
}
_LIBCPP_HIDE_FROM_ABI
auto format(basic_string_view<_CharT> __str, auto& __ctx)
-> decltype(__ctx.out()) {
// TODO FMT Implement the parsed formatting arguments.
auto __out_it = __ctx.out();
for (const auto __c : __str)
*__out_it++ = __c;
return __out_it;
}
};
template <class _Tp, class _CharT>
requires(is_arithmetic_v<_Tp> &&
!same_as<_Tp, bool>) struct _LIBCPP_HIDE_FROM_ABI
__formatter_arithmetic {
_LIBCPP_HIDE_FROM_ABI
auto parse(auto& __parse_ctx) -> decltype(__parse_ctx.begin()) {
// TODO FMT Implement
return __parse_ctx.begin();
}
_LIBCPP_HIDE_FROM_ABI
auto format(_Tp __value, auto& __ctx) -> decltype(__ctx.out()) {
return __handle_format(__value, __ctx);
}
private:
template <class _Uv>
_LIBCPP_HIDDEN static string
__convert(_Uv __value) requires(same_as<_CharT, char>) {
return _VSTD::to_string(__value);
}
template <class _Uv>
_LIBCPP_HIDDEN static wstring
__convert(_Uv __value) requires(same_as<_CharT, wchar_t>) {
return _VSTD::to_wstring(__value);
}
template <class _Uv>
_LIBCPP_HIDDEN auto __handle_format(_Uv __value, auto& __ctx)
-> decltype(__ctx.out())
#ifndef _LIBCPP_HAS_NO_INT128
requires(!same_as<_Uv, __int128_t> && !same_as<_Uv, __uint128_t>)
#endif
{
// TODO FMT Implement using formatting arguments
// TODO FMT Improve PoC since using std::to_string is inefficient.
// Note the code doesn't use std::string::iterator since the unit tests
// test with debug iterators and they fail with strings created from
// std::to_string.
auto __str = __convert(__value);
auto __out_it = __ctx.out();
for (size_t __i = 0, __e = __str.size(); __i != __e; ++__i)
*__out_it++ = __str[__i];
return __out_it;
}
#ifndef _LIBCPP_HAS_NO_INT128
template <class _Uv>
_LIBCPP_HIDDEN auto __handle_format(_Uv __value, auto& __ctx)
-> decltype(__ctx.out()) requires(same_as<_Uv, __int128_t> ||
same_as<_Uv, __uint128_t>) {
using _To = conditional_t<is_signed_v<_Uv>, long long, unsigned long long>;
// TODO FMT Implement full 128-bit support.
if (__value < numeric_limits<_To>::min() ||
__value > numeric_limits<_To>::max())
__throw_format_error("128-bit value is outside of implemented range");
return __handle_format(static_cast<_To>(__value), __ctx);
}
#endif
};
} // namespace __format
// These specializations are helper stubs and not proper formatters.
// TODO FMT Implement the proper formatter specializations.
// [format.formatter.spec]/2.1 The specializations
template <>
struct _LIBCPP_TEMPLATE_VIS formatter<char, char>
: public __format::__formatter_char<char, char> {};
template <>
struct _LIBCPP_TEMPLATE_VIS formatter<char, wchar_t>
: public __format::__formatter_char<char, wchar_t> {};
template <>
struct _LIBCPP_TEMPLATE_VIS formatter<wchar_t, wchar_t>
: public __format::__formatter_char<wchar_t, wchar_t> {};
// [format.formatter.spec]/2.2 For each charT, the string type specializations
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<_CharT*, _CharT>
: public __format::__formatter_c_string<_CharT> {
using _Base = __format::__formatter_c_string<_CharT>;
_LIBCPP_HIDE_FROM_ABI auto format(_CharT* __str, auto& __ctx)
-> decltype(__ctx.out()) {
_LIBCPP_ASSERT(__str, "The basic_format_arg constructor should have "
"prevented an invalid pointer");
return _Base::format(__str, __ctx);
}
};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<const _CharT*, _CharT>
: public __format::__formatter_c_string<_CharT> {};
template <class _CharT, size_t _Size>
struct _LIBCPP_TEMPLATE_VIS formatter<const _CharT[_Size], _CharT>
: public __format::__formatter_string<_CharT> {
using _Base = __format::__formatter_string<_CharT>;
_LIBCPP_HIDE_FROM_ABI auto format(const _CharT __str[_Size], auto& __ctx)
-> decltype(__ctx.out()) {
return _Base::format(_VSTD::basic_string_view<_CharT>(__str, _Size), __ctx);
}
};
template <class _CharT, class _Traits, class _Allocator>
struct _LIBCPP_TEMPLATE_VIS
formatter<basic_string<_CharT, _Traits, _Allocator>, _CharT>
: public __format::__formatter_string<_CharT> {
using _Base = __format::__formatter_string<_CharT>;
_LIBCPP_HIDE_FROM_ABI auto
format(const basic_string<_CharT, _Traits, _Allocator>& __str, auto& __ctx)
-> decltype(__ctx.out()) {
return _Base::format(_VSTD::basic_string_view<_CharT>(__str), __ctx);
}
};
template <class _CharT, class _Traits>
struct _LIBCPP_TEMPLATE_VIS
formatter<basic_string_view<_CharT, _Traits>, _CharT>
: public __format::__formatter_string<_CharT> {};
// [format.formatter.spec]/2.3
// For each charT, for each cv-unqualified arithmetic type ArithmeticT other
// than char, wchar_t, char8_t, char16_t, or char32_t, a specialization
// Boolean.
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<bool, _CharT> {
_LIBCPP_HIDE_FROM_ABI
auto parse(auto& __parse_ctx) -> decltype(__parse_ctx.begin()) {
// TODO FMT Implement
return __parse_ctx.begin();
}
_LIBCPP_HIDE_FROM_ABI
auto format(bool __b, auto& __ctx) -> decltype(__ctx.out()) {
// TODO FMT Implement using formatting arguments
auto __out_it = __ctx.out();
*__out_it++ = _CharT('0') + __b;
return __out_it;
}
};
// Signed integral types.
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<signed char, _CharT>
: public __format::__formatter_arithmetic<signed char, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<short, _CharT>
: public __format::__formatter_arithmetic<short, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<int, _CharT>
: public __format::__formatter_arithmetic<int, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<long, _CharT>
: public __format::__formatter_arithmetic<long, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<long long, _CharT>
: public __format::__formatter_arithmetic<long long, _CharT> {};
#ifndef _LIBCPP_HAS_NO_INT128
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<__int128_t, _CharT>
: public __format::__formatter_arithmetic<__int128_t, _CharT> {};
#endif
// Unsigned integral types.
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<unsigned char, _CharT>
: public __format::__formatter_arithmetic<unsigned char, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<unsigned short, _CharT>
: public __format::__formatter_arithmetic<unsigned short, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<unsigned, _CharT>
: public __format::__formatter_arithmetic<unsigned, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<unsigned long, _CharT>
: public __format::__formatter_arithmetic<unsigned long, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<unsigned long long, _CharT>
: public __format::__formatter_arithmetic<unsigned long long, _CharT> {};
#ifndef _LIBCPP_HAS_NO_INT128
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS formatter<__uint128_t, _CharT>
: public __format::__formatter_arithmetic<__uint128_t, _CharT> {};
#endif
// Floating point types.
// TODO FMT There are no replacements for the floating point stubs due to not
// having floating point support in std::to_chars yet. These stubs aren't
// removed since they are useful for developing the real versions.
// Ultimately the stubs should be implemented properly and this code can be
// removed.
#if 0
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<float, _CharT>
: public __format::__formatter_arithmetic<float, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
formatter<double, _CharT>
: public __format::__formatter_arithmetic<double, _CharT> {};
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
formatter<long double, _CharT>
: public __format::__formatter_arithmetic<long double, _CharT> {};
#endif
namespace __format {
template <class _CharT, class _ParseCtx, class _Ctx>
_LIBCPP_HIDE_FROM_ABI const _CharT*
__handle_replacement_field(const _CharT* __begin, const _CharT* __end,
_ParseCtx& __parse_ctx, _Ctx& __ctx) {
__format::__parse_number_result __r =
__format::__parse_arg_id(__begin, __end, __parse_ctx);
switch (*__r.__ptr) {
case _CharT(':'):
// The arg-id has a format-specifier, advance the input to the format-spec.
__parse_ctx.advance_to(__r.__ptr + 1);
break;
case _CharT('}'):
// The arg-id has no format-specifier.
__parse_ctx.advance_to(__r.__ptr);
break;
default:
__throw_format_error(
"The replacement field arg-id should terminate at a ':' or '}'");
}
_VSTD::visit_format_arg(
[&](auto __arg) {
if constexpr (same_as<decltype(__arg), monostate>)
__throw_format_error("Argument index out of bounds");
else {
formatter<decltype(__arg), _CharT> __formatter;
__parse_ctx.advance_to(__formatter.parse(__parse_ctx));
__ctx.advance_to(__formatter.format(__arg, __ctx));
}
},
__ctx.arg(__r.__value));
__begin = __parse_ctx.begin();
if (__begin == __end || *__begin != _CharT('}'))
__throw_format_error("The replacement field misses a terminating '}'");
return ++__begin;
}
template <class _ParseCtx, class _Ctx>
_LIBCPP_HIDE_FROM_ABI typename _Ctx::iterator
__vformat_to(_ParseCtx&& __parse_ctx, _Ctx&& __ctx) {
using _CharT = typename _ParseCtx::char_type;
static_assert(same_as<typename _Ctx::char_type, _CharT>);
const _CharT* __begin = __parse_ctx.begin();
const _CharT* __end = __parse_ctx.end();
typename _Ctx::iterator __out_it = __ctx.out();
while (__begin != __end) {
switch (*__begin) {
case _CharT('{'):
++__begin;
if (__begin == __end)
__throw_format_error("The format string terminates at a '{'");
if (*__begin != _CharT('{')) [[likely]] {
__ctx.advance_to(_VSTD::move(__out_it));
__begin =
__handle_replacement_field(__begin, __end, __parse_ctx, __ctx);
__out_it = __ctx.out();
// The output is written and __begin points to the next character. So
// start the next iteration.
continue;
}
// The string is an escape character.
break;
case _CharT('}'):
++__begin;
if (__begin == __end || *__begin != _CharT('}'))
__throw_format_error(
"The format string contains an invalid escape sequence");
break;
}
// Copy the character to the output verbatim.
*__out_it++ = *__begin++;
}
return __out_it;
}
} // namespace __format
template <class _OutIt, class _CharT>
requires(output_iterator<_OutIt, const _CharT&>) _LIBCPP_HIDE_FROM_ABI _OutIt
__vformat_to(_OutIt __out_it, basic_string_view<_CharT> __fmt,
format_args_t<type_identity_t<_OutIt>, _CharT> __args) {
return __format::__vformat_to(
basic_format_parse_context{__fmt, __args.__size()},
_VSTD::__format_context_create(_VSTD::move(__out_it), __args));
}
template <output_iterator<const char&> _OutIt>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt
vformat_to(_OutIt __out_it, string_view __fmt,
format_args_t<type_identity_t<_OutIt>, char> __args) {
return _VSTD::__vformat_to(_VSTD::move(__out_it), __fmt, __args);
}
template <output_iterator<const wchar_t&> _OutIt>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt
vformat_to(_OutIt __out_it, wstring_view __fmt,
format_args_t<type_identity_t<_OutIt>, wchar_t> __args) {
return _VSTD::__vformat_to(_VSTD::move(__out_it), __fmt, __args);
}
template <output_iterator<const char&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt
format_to(_OutIt __out_it, string_view __fmt, const _Args&... __args) {
return _VSTD::vformat_to(
_VSTD::move(__out_it), __fmt,
_VSTD::make_format_args<basic_format_context<_OutIt, char>>(__args...));
}
template <output_iterator<const wchar_t&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt
format_to(_OutIt __out_it, wstring_view __fmt, const _Args&... __args) {
return _VSTD::vformat_to(
_VSTD::move(__out_it), __fmt,
_VSTD::make_format_args<basic_format_context<_OutIt, wchar_t>>(
__args...));
}
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT string
vformat(string_view __fmt, format_args __args) {
string __res;
_VSTD::vformat_to(_VSTD::back_inserter(__res), __fmt, __args);
return __res;
}
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT wstring
vformat(wstring_view __fmt, wformat_args __args) {
wstring __res;
_VSTD::vformat_to(_VSTD::back_inserter(__res), __fmt, __args);
return __res;
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT string
format(string_view __fmt, const _Args&... __args) {
return _VSTD::vformat(__fmt, _VSTD::make_format_args(__args...));
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT wstring
format(wstring_view __fmt, const _Args&... __args) {
return _VSTD::vformat(__fmt, _VSTD::make_wformat_args(__args...));
}
template <class _OutIt>
struct _LIBCPP_TEMPLATE_VIS format_to_n_result {
_OutIt out;
iter_difference_t<_OutIt> size;
};
template <output_iterator<const char&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT format_to_n_result<_OutIt>
format_to_n(_OutIt __out_it, iter_difference_t<_OutIt> __n, string_view __fmt,
const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
string __str = _VSTD::vformat(__fmt, _VSTD::make_format_args(__args...));
iter_difference_t<_OutIt> __s = __str.size();
iter_difference_t<_OutIt> __m =
_VSTD::clamp(__n, iter_difference_t<_OutIt>(0), __s);
__out_it = _VSTD::copy_n(__str.begin(), __m, _VSTD::move(__out_it));
return {_VSTD::move(__out_it), __s};
}
template <output_iterator<const wchar_t&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT format_to_n_result<_OutIt>
format_to_n(_OutIt __out_it, iter_difference_t<_OutIt> __n, wstring_view __fmt,
const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
wstring __str = _VSTD::vformat(__fmt, _VSTD::make_wformat_args(__args...));
iter_difference_t<_OutIt> __s = __str.size();
iter_difference_t<_OutIt> __m =
_VSTD::clamp(__n, iter_difference_t<_OutIt>(0), __s);
__out_it = _VSTD::copy_n(__str.begin(), __m, _VSTD::move(__out_it));
return {_VSTD::move(__out_it), __s};
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT size_t
formatted_size(string_view __fmt, const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
return _VSTD::vformat(__fmt, _VSTD::make_format_args(__args...)).size();
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT size_t
formatted_size(wstring_view __fmt, const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
return _VSTD::vformat(__fmt, _VSTD::make_wformat_args(__args...)).size();
}
#ifndef _LIBCPP_HAS_NO_LOCALIZATION
template <class _OutIt, class _CharT>
requires(output_iterator<_OutIt, const _CharT&>) _LIBCPP_HIDE_FROM_ABI _OutIt
__vformat_to(_OutIt __out_it, locale __loc, basic_string_view<_CharT> __fmt,
format_args_t<type_identity_t<_OutIt>, _CharT> __args) {
return __format::__vformat_to(
basic_format_parse_context{__fmt, __args.__size()},
_VSTD::__format_context_create(_VSTD::move(__out_it), __args,
_VSTD::move(__loc)));
}
template <output_iterator<const char&> _OutIt>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt
vformat_to(_OutIt __out_it, locale __loc, string_view __fmt,
format_args_t<type_identity_t<_OutIt>, char> __args) {
return _VSTD::__vformat_to(_VSTD::move(__out_it), _VSTD::move(__loc), __fmt,
__args);
}
template <output_iterator<const wchar_t&> _OutIt>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt
vformat_to(_OutIt __out_it, locale __loc, wstring_view __fmt,
format_args_t<type_identity_t<_OutIt>, wchar_t> __args) {
return _VSTD::__vformat_to(_VSTD::move(__out_it), _VSTD::move(__loc), __fmt,
__args);
}
template <output_iterator<const char&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt format_to(
_OutIt __out_it, locale __loc, string_view __fmt, const _Args&... __args) {
return _VSTD::vformat_to(
_VSTD::move(__out_it), _VSTD::move(__loc), __fmt,
_VSTD::make_format_args<basic_format_context<_OutIt, char>>(__args...));
}
template <output_iterator<const wchar_t&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT _OutIt format_to(
_OutIt __out_it, locale __loc, wstring_view __fmt, const _Args&... __args) {
return _VSTD::vformat_to(
_VSTD::move(__out_it), _VSTD::move(__loc), __fmt,
_VSTD::make_format_args<basic_format_context<_OutIt, wchar_t>>(
__args...));
}
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT string
vformat(locale __loc, string_view __fmt, format_args __args) {
string __res;
_VSTD::vformat_to(_VSTD::back_inserter(__res), _VSTD::move(__loc), __fmt,
__args);
return __res;
}
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT wstring
vformat(locale __loc, wstring_view __fmt, wformat_args __args) {
wstring __res;
_VSTD::vformat_to(_VSTD::back_inserter(__res), _VSTD::move(__loc), __fmt,
__args);
return __res;
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT string
format(locale __loc, string_view __fmt, const _Args&... __args) {
return _VSTD::vformat(_VSTD::move(__loc), __fmt,
_VSTD::make_format_args(__args...));
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT wstring
format(locale __loc, wstring_view __fmt, const _Args&... __args) {
return _VSTD::vformat(_VSTD::move(__loc), __fmt,
_VSTD::make_wformat_args(__args...));
}
template <output_iterator<const char&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT format_to_n_result<_OutIt>
format_to_n(_OutIt __out_it, iter_difference_t<_OutIt> __n, locale __loc,
string_view __fmt, const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
string __str = _VSTD::vformat(_VSTD::move(__loc), __fmt,
_VSTD::make_format_args(__args...));
iter_difference_t<_OutIt> __s = __str.size();
iter_difference_t<_OutIt> __m =
_VSTD::clamp(__n, iter_difference_t<_OutIt>(0), __s);
__out_it = _VSTD::copy_n(__str.begin(), __m, _VSTD::move(__out_it));
return {_VSTD::move(__out_it), __s};
}
template <output_iterator<const wchar_t&> _OutIt, class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT format_to_n_result<_OutIt>
format_to_n(_OutIt __out_it, iter_difference_t<_OutIt> __n, locale __loc,
wstring_view __fmt, const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
wstring __str = _VSTD::vformat(_VSTD::move(__loc), __fmt,
_VSTD::make_wformat_args(__args...));
iter_difference_t<_OutIt> __s = __str.size();
iter_difference_t<_OutIt> __m =
_VSTD::clamp(__n, iter_difference_t<_OutIt>(0), __s);
__out_it = _VSTD::copy_n(__str.begin(), __m, _VSTD::move(__out_it));
return {_VSTD::move(__out_it), __s};
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT size_t
formatted_size(locale __loc, string_view __fmt, const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
return _VSTD::vformat(_VSTD::move(__loc), __fmt,
_VSTD::make_format_args(__args...))
.size();
}
template <class... _Args>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT size_t
formatted_size(locale __loc, wstring_view __fmt, const _Args&... __args) {
// TODO FMT Improve PoC: using std::string is inefficient.
return _VSTD::vformat(_VSTD::move(__loc), __fmt,
_VSTD::make_wformat_args(__args...))
.size();
}
#endif // _LIBCPP_HAS_NO_LOCALIZATION
#endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
#endif //_LIBCPP_STD_VER > 17
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
#endif // _LIBCPP_FORMAT
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