643 lines
21 KiB
C
643 lines
21 KiB
C
|
// Formatting library for C++ - experimental format string compilation
|
||
|
|
//
|
||
|
|
// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
|
||
|
|
// All rights reserved.
|
||
|
|
//
|
||
|
|
// For the license information refer to format.h.
|
||
|
|
|
||
|
|
#ifndef FMT_COMPILE_H_
|
||
|
|
#define FMT_COMPILE_H_
|
||
|
|
|
||
|
|
#include "format.h"
|
||
|
|
|
||
|
|
FMT_BEGIN_NAMESPACE
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
// An output iterator that counts the number of objects written to it and
|
||
|
|
// discards them.
|
||
|
|
class counting_iterator {
|
||
|
|
private:
|
||
|
|
size_t count_;
|
||
|
|
|
||
|
|
public:
|
||
|
|
using iterator_category = std::output_iterator_tag;
|
||
|
|
using difference_type = std::ptrdiff_t;
|
||
|
|
using pointer = void;
|
||
|
|
using reference = void;
|
||
|
|
using _Unchecked_type = counting_iterator; // Mark iterator as checked.
|
||
|
|
|
||
|
|
struct value_type {
|
||
|
|
template <typename T> void operator=(const T&) {}
|
||
|
|
};
|
||
|
|
|
||
|
|
counting_iterator() : count_(0) {}
|
||
|
|
|
||
|
|
size_t count() const { return count_; }
|
||
|
|
|
||
|
|
counting_iterator& operator++() {
|
||
|
|
++count_;
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
counting_iterator operator++(int) {
|
||
|
|
auto it = *this;
|
||
|
|
++*this;
|
||
|
|
return it;
|
||
|
|
}
|
||
|
|
|
||
|
|
friend counting_iterator operator+(counting_iterator it, difference_type n) {
|
||
|
|
it.count_ += static_cast<size_t>(n);
|
||
|
|
return it;
|
||
|
|
}
|
||
|
|
|
||
|
|
value_type operator*() const { return {}; }
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Char, typename InputIt>
|
||
|
|
inline counting_iterator copy_str(InputIt begin, InputIt end,
|
||
|
|
counting_iterator it) {
|
||
|
|
return it + (end - begin);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename OutputIt> class truncating_iterator_base {
|
||
|
|
protected:
|
||
|
|
OutputIt out_;
|
||
|
|
size_t limit_;
|
||
|
|
size_t count_ = 0;
|
||
|
|
|
||
|
|
truncating_iterator_base() : out_(), limit_(0) {}
|
||
|
|
|
||
|
|
truncating_iterator_base(OutputIt out, size_t limit)
|
||
|
|
: out_(out), limit_(limit) {}
|
||
|
|
|
||
|
|
public:
|
||
|
|
using iterator_category = std::output_iterator_tag;
|
||
|
|
using value_type = typename std::iterator_traits<OutputIt>::value_type;
|
||
|
|
using difference_type = std::ptrdiff_t;
|
||
|
|
using pointer = void;
|
||
|
|
using reference = void;
|
||
|
|
using _Unchecked_type =
|
||
|
|
truncating_iterator_base; // Mark iterator as checked.
|
||
|
|
|
||
|
|
OutputIt base() const { return out_; }
|
||
|
|
size_t count() const { return count_; }
|
||
|
|
};
|
||
|
|
|
||
|
|
// An output iterator that truncates the output and counts the number of objects
|
||
|
|
// written to it.
|
||
|
|
template <typename OutputIt,
|
||
|
|
typename Enable = typename std::is_void<
|
||
|
|
typename std::iterator_traits<OutputIt>::value_type>::type>
|
||
|
|
class truncating_iterator;
|
||
|
|
|
||
|
|
template <typename OutputIt>
|
||
|
|
class truncating_iterator<OutputIt, std::false_type>
|
||
|
|
: public truncating_iterator_base<OutputIt> {
|
||
|
|
mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
|
||
|
|
|
||
|
|
public:
|
||
|
|
using value_type = typename truncating_iterator_base<OutputIt>::value_type;
|
||
|
|
|
||
|
|
truncating_iterator() = default;
|
||
|
|
|
||
|
|
truncating_iterator(OutputIt out, size_t limit)
|
||
|
|
: truncating_iterator_base<OutputIt>(out, limit) {}
|
||
|
|
|
||
|
|
truncating_iterator& operator++() {
|
||
|
|
if (this->count_++ < this->limit_) ++this->out_;
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
truncating_iterator operator++(int) {
|
||
|
|
auto it = *this;
|
||
|
|
++*this;
|
||
|
|
return it;
|
||
|
|
}
|
||
|
|
|
||
|
|
value_type& operator*() const {
|
||
|
|
return this->count_ < this->limit_ ? *this->out_ : blackhole_;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename OutputIt>
|
||
|
|
class truncating_iterator<OutputIt, std::true_type>
|
||
|
|
: public truncating_iterator_base<OutputIt> {
|
||
|
|
public:
|
||
|
|
truncating_iterator() = default;
|
||
|
|
|
||
|
|
truncating_iterator(OutputIt out, size_t limit)
|
||
|
|
: truncating_iterator_base<OutputIt>(out, limit) {}
|
||
|
|
|
||
|
|
template <typename T> truncating_iterator& operator=(T val) {
|
||
|
|
if (this->count_++ < this->limit_) *this->out_++ = val;
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
truncating_iterator& operator++() { return *this; }
|
||
|
|
truncating_iterator& operator++(int) { return *this; }
|
||
|
|
truncating_iterator& operator*() { return *this; }
|
||
|
|
};
|
||
|
|
|
||
|
|
// A compile-time string which is compiled into fast formatting code.
|
||
|
|
class compiled_string {};
|
||
|
|
|
||
|
|
template <typename S>
|
||
|
|
struct is_compiled_string : std::is_base_of<compiled_string, S> {};
|
||
|
|
|
||
|
|
/**
|
||
|
|
\rst
|
||
|
|
Converts a string literal *s* into a format string that will be parsed at
|
||
|
|
compile time and converted into efficient formatting code. Requires C++17
|
||
|
|
``constexpr if`` compiler support.
|
||
|
|
|
||
|
|
**Example**::
|
||
|
|
|
||
|
|
// Converts 42 into std::string using the most efficient method and no
|
||
|
|
// runtime format string processing.
|
||
|
|
std::string s = fmt::format(FMT_COMPILE("{}"), 42);
|
||
|
|
\endrst
|
||
|
|
*/
|
||
|
|
#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
|
||
|
|
# define FMT_COMPILE(s) \
|
||
|
|
FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
|
||
|
|
#else
|
||
|
|
# define FMT_COMPILE(s) FMT_STRING(s)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
|
||
|
|
template <typename Char, size_t N,
|
||
|
|
fmt::detail_exported::fixed_string<Char, N> Str>
|
||
|
|
struct udl_compiled_string : compiled_string {
|
||
|
|
using char_type = Char;
|
||
|
|
constexpr operator basic_string_view<char_type>() const {
|
||
|
|
return {Str.data, N - 1};
|
||
|
|
}
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
template <typename T, typename... Tail>
|
||
|
|
const T& first(const T& value, const Tail&...) {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
|
||
|
|
template <typename... Args> struct type_list {};
|
||
|
|
|
||
|
|
// Returns a reference to the argument at index N from [first, rest...].
|
||
|
|
template <int N, typename T, typename... Args>
|
||
|
|
constexpr const auto& get([[maybe_unused]] const T& first,
|
||
|
|
[[maybe_unused]] const Args&... rest) {
|
||
|
|
static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
|
||
|
|
if constexpr (N == 0)
|
||
|
|
return first;
|
||
|
|
else
|
||
|
|
return detail::get<N - 1>(rest...);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Char, typename... Args>
|
||
|
|
constexpr int get_arg_index_by_name(basic_string_view<Char> name,
|
||
|
|
type_list<Args...>) {
|
||
|
|
return get_arg_index_by_name<Args...>(name);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <int N, typename> struct get_type_impl;
|
||
|
|
|
||
|
|
template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
|
||
|
|
using type =
|
||
|
|
remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <int N, typename T>
|
||
|
|
using get_type = typename get_type_impl<N, T>::type;
|
||
|
|
|
||
|
|
template <typename T> struct is_compiled_format : std::false_type {};
|
||
|
|
|
||
|
|
template <typename Char> struct text {
|
||
|
|
basic_string_view<Char> data;
|
||
|
|
using char_type = Char;
|
||
|
|
|
||
|
|
template <typename OutputIt, typename... Args>
|
||
|
|
constexpr OutputIt format(OutputIt out, const Args&...) const {
|
||
|
|
return write<Char>(out, data);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Char>
|
||
|
|
struct is_compiled_format<text<Char>> : std::true_type {};
|
||
|
|
|
||
|
|
template <typename Char>
|
||
|
|
constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
|
||
|
|
size_t size) {
|
||
|
|
return {{&s[pos], size}};
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Char> struct code_unit {
|
||
|
|
Char value;
|
||
|
|
using char_type = Char;
|
||
|
|
|
||
|
|
template <typename OutputIt, typename... Args>
|
||
|
|
constexpr OutputIt format(OutputIt out, const Args&...) const {
|
||
|
|
return write<Char>(out, value);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// This ensures that the argument type is convertible to `const T&`.
|
||
|
|
template <typename T, int N, typename... Args>
|
||
|
|
constexpr const T& get_arg_checked(const Args&... args) {
|
||
|
|
const auto& arg = detail::get<N>(args...);
|
||
|
|
if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
|
||
|
|
return arg.value;
|
||
|
|
} else {
|
||
|
|
return arg;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Char>
|
||
|
|
struct is_compiled_format<code_unit<Char>> : std::true_type {};
|
||
|
|
|
||
|
|
// A replacement field that refers to argument N.
|
||
|
|
template <typename Char, typename T, int N> struct field {
|
||
|
|
using char_type = Char;
|
||
|
|
|
||
|
|
template <typename OutputIt, typename... Args>
|
||
|
|
constexpr OutputIt format(OutputIt out, const Args&... args) const {
|
||
|
|
return write<Char>(out, get_arg_checked<T, N>(args...));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Char, typename T, int N>
|
||
|
|
struct is_compiled_format<field<Char, T, N>> : std::true_type {};
|
||
|
|
|
||
|
|
// A replacement field that refers to argument with name.
|
||
|
|
template <typename Char> struct runtime_named_field {
|
||
|
|
using char_type = Char;
|
||
|
|
basic_string_view<Char> name;
|
||
|
|
|
||
|
|
template <typename OutputIt, typename T>
|
||
|
|
constexpr static bool try_format_argument(
|
||
|
|
OutputIt& out,
|
||
|
|
// [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
|
||
|
|
[[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
|
||
|
|
if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
|
||
|
|
if (arg_name == arg.name) {
|
||
|
|
out = write<Char>(out, arg.value);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename OutputIt, typename... Args>
|
||
|
|
constexpr OutputIt format(OutputIt out, const Args&... args) const {
|
||
|
|
bool found = (try_format_argument(out, name, args) || ...);
|
||
|
|
if (!found) {
|
||
|
|
FMT_THROW(format_error("argument with specified name is not found"));
|
||
|
|
}
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Char>
|
||
|
|
struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
|
||
|
|
|
||
|
|
// A replacement field that refers to argument N and has format specifiers.
|
||
|
|
template <typename Char, typename T, int N> struct spec_field {
|
||
|
|
using char_type = Char;
|
||
|
|
formatter<T, Char> fmt;
|
||
|
|
|
||
|
|
template <typename OutputIt, typename... Args>
|
||
|
|
constexpr FMT_INLINE OutputIt format(OutputIt out,
|
||
|
|
const Args&... args) const {
|
||
|
|
const auto& vargs =
|
||
|
|
fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
|
||
|
|
basic_format_context<OutputIt, Char> ctx(out, vargs);
|
||
|
|
return fmt.format(get_arg_checked<T, N>(args...), ctx);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Char, typename T, int N>
|
||
|
|
struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
|
||
|
|
|
||
|
|
template <typename L, typename R> struct concat {
|
||
|
|
L lhs;
|
||
|
|
R rhs;
|
||
|
|
using char_type = typename L::char_type;
|
||
|
|
|
||
|
|
template <typename OutputIt, typename... Args>
|
||
|
|
constexpr OutputIt format(OutputIt out, const Args&... args) const {
|
||
|
|
out = lhs.format(out, args...);
|
||
|
|
return rhs.format(out, args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename L, typename R>
|
||
|
|
struct is_compiled_format<concat<L, R>> : std::true_type {};
|
||
|
|
|
||
|
|
template <typename L, typename R>
|
||
|
|
constexpr concat<L, R> make_concat(L lhs, R rhs) {
|
||
|
|
return {lhs, rhs};
|
||
|
|
}
|
||
|
|
|
||
|
|
struct unknown_format {};
|
||
|
|
|
||
|
|
template <typename Char>
|
||
|
|
constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
|
||
|
|
for (size_t size = str.size(); pos != size; ++pos) {
|
||
|
|
if (str[pos] == '{' || str[pos] == '}') break;
|
||
|
|
}
|
||
|
|
return pos;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Args, size_t POS, int ID, typename S>
|
||
|
|
constexpr auto compile_format_string(S format_str);
|
||
|
|
|
||
|
|
template <typename Args, size_t POS, int ID, typename T, typename S>
|
||
|
|
constexpr auto parse_tail(T head, S format_str) {
|
||
|
|
if constexpr (POS !=
|
||
|
|
basic_string_view<typename S::char_type>(format_str).size()) {
|
||
|
|
constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
|
||
|
|
if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
|
||
|
|
unknown_format>())
|
||
|
|
return tail;
|
||
|
|
else
|
||
|
|
return make_concat(head, tail);
|
||
|
|
} else {
|
||
|
|
return head;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, typename Char> struct parse_specs_result {
|
||
|
|
formatter<T, Char> fmt;
|
||
|
|
size_t end;
|
||
|
|
int next_arg_id;
|
||
|
|
};
|
||
|
|
|
||
|
|
constexpr int manual_indexing_id = -1;
|
||
|
|
|
||
|
|
template <typename T, typename Char>
|
||
|
|
constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
|
||
|
|
size_t pos, int next_arg_id) {
|
||
|
|
str.remove_prefix(pos);
|
||
|
|
auto ctx = basic_format_parse_context<Char>(str, {}, next_arg_id);
|
||
|
|
auto f = formatter<T, Char>();
|
||
|
|
auto end = f.parse(ctx);
|
||
|
|
return {f, pos + fmt::detail::to_unsigned(end - str.data()) + 1,
|
||
|
|
next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Char> struct arg_id_handler {
|
||
|
|
arg_ref<Char> arg_id;
|
||
|
|
|
||
|
|
constexpr int operator()() {
|
||
|
|
FMT_ASSERT(false, "handler cannot be used with automatic indexing");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
constexpr int operator()(int id) {
|
||
|
|
arg_id = arg_ref<Char>(id);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
constexpr int operator()(basic_string_view<Char> id) {
|
||
|
|
arg_id = arg_ref<Char>(id);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
constexpr void on_error(const char* message) {
|
||
|
|
FMT_THROW(format_error(message));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Char> struct parse_arg_id_result {
|
||
|
|
arg_ref<Char> arg_id;
|
||
|
|
const Char* arg_id_end;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <int ID, typename Char>
|
||
|
|
constexpr auto parse_arg_id(const Char* begin, const Char* end) {
|
||
|
|
auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
|
||
|
|
auto arg_id_end = parse_arg_id(begin, end, handler);
|
||
|
|
return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, typename Enable = void> struct field_type {
|
||
|
|
using type = remove_cvref_t<T>;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
|
||
|
|
using type = remove_cvref_t<decltype(T::value)>;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
|
||
|
|
typename S>
|
||
|
|
constexpr auto parse_replacement_field_then_tail(S format_str) {
|
||
|
|
using char_type = typename S::char_type;
|
||
|
|
constexpr auto str = basic_string_view<char_type>(format_str);
|
||
|
|
constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
|
||
|
|
if constexpr (c == '}') {
|
||
|
|
return parse_tail<Args, END_POS + 1, NEXT_ID>(
|
||
|
|
field<char_type, typename field_type<T>::type, ARG_INDEX>(),
|
||
|
|
format_str);
|
||
|
|
} else if constexpr (c == ':') {
|
||
|
|
constexpr auto result = parse_specs<typename field_type<T>::type>(
|
||
|
|
str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
|
||
|
|
return parse_tail<Args, result.end, result.next_arg_id>(
|
||
|
|
spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
|
||
|
|
result.fmt},
|
||
|
|
format_str);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Compiles a non-empty format string and returns the compiled representation
|
||
|
|
// or unknown_format() on unrecognized input.
|
||
|
|
template <typename Args, size_t POS, int ID, typename S>
|
||
|
|
constexpr auto compile_format_string(S format_str) {
|
||
|
|
using char_type = typename S::char_type;
|
||
|
|
constexpr auto str = basic_string_view<char_type>(format_str);
|
||
|
|
if constexpr (str[POS] == '{') {
|
||
|
|
if constexpr (POS + 1 == str.size())
|
||
|
|
FMT_THROW(format_error("unmatched '{' in format string"));
|
||
|
|
if constexpr (str[POS + 1] == '{') {
|
||
|
|
return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
|
||
|
|
} else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
|
||
|
|
static_assert(ID != manual_indexing_id,
|
||
|
|
"cannot switch from manual to automatic argument indexing");
|
||
|
|
constexpr auto next_id =
|
||
|
|
ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
|
||
|
|
return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
|
||
|
|
POS + 1, ID, next_id>(
|
||
|
|
format_str);
|
||
|
|
} else {
|
||
|
|
constexpr auto arg_id_result =
|
||
|
|
parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
|
||
|
|
constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
|
||
|
|
constexpr char_type c =
|
||
|
|
arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
|
||
|
|
static_assert(c == '}' || c == ':', "missing '}' in format string");
|
||
|
|
if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
|
||
|
|
static_assert(
|
||
|
|
ID == manual_indexing_id || ID == 0,
|
||
|
|
"cannot switch from automatic to manual argument indexing");
|
||
|
|
constexpr auto arg_index = arg_id_result.arg_id.val.index;
|
||
|
|
return parse_replacement_field_then_tail<get_type<arg_index, Args>,
|
||
|
|
Args, arg_id_end_pos,
|
||
|
|
arg_index, manual_indexing_id>(
|
||
|
|
format_str);
|
||
|
|
} else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
|
||
|
|
constexpr auto arg_index =
|
||
|
|
get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
|
||
|
|
if constexpr (arg_index != invalid_arg_index) {
|
||
|
|
constexpr auto next_id =
|
||
|
|
ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
|
||
|
|
return parse_replacement_field_then_tail<
|
||
|
|
decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
|
||
|
|
arg_index, next_id>(format_str);
|
||
|
|
} else {
|
||
|
|
if constexpr (c == '}') {
|
||
|
|
return parse_tail<Args, arg_id_end_pos + 1, ID>(
|
||
|
|
runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
|
||
|
|
format_str);
|
||
|
|
} else if constexpr (c == ':') {
|
||
|
|
return unknown_format(); // no type info for specs parsing
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else if constexpr (str[POS] == '}') {
|
||
|
|
if constexpr (POS + 1 == str.size())
|
||
|
|
FMT_THROW(format_error("unmatched '}' in format string"));
|
||
|
|
return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
|
||
|
|
} else {
|
||
|
|
constexpr auto end = parse_text(str, POS + 1);
|
||
|
|
if constexpr (end - POS > 1) {
|
||
|
|
return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
|
||
|
|
format_str);
|
||
|
|
} else {
|
||
|
|
return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
|
||
|
|
format_str);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename... Args, typename S,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
constexpr auto compile(S format_str) {
|
||
|
|
constexpr auto str = basic_string_view<typename S::char_type>(format_str);
|
||
|
|
if constexpr (str.size() == 0) {
|
||
|
|
return detail::make_text(str, 0, 0);
|
||
|
|
} else {
|
||
|
|
constexpr auto result =
|
||
|
|
detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
|
||
|
|
format_str);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
FMT_MODULE_EXPORT_BEGIN
|
||
|
|
|
||
|
|
#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
|
||
|
|
|
||
|
|
template <typename CompiledFormat, typename... Args,
|
||
|
|
typename Char = typename CompiledFormat::char_type,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
|
||
|
|
FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
|
||
|
|
const Args&... args) {
|
||
|
|
auto s = std::basic_string<Char>();
|
||
|
|
cf.format(std::back_inserter(s), args...);
|
||
|
|
return s;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename OutputIt, typename CompiledFormat, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
|
||
|
|
constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
|
||
|
|
const Args&... args) {
|
||
|
|
return cf.format(out, args...);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename S, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
|
||
|
|
Args&&... args) {
|
||
|
|
if constexpr (std::is_same<typename S::char_type, char>::value) {
|
||
|
|
constexpr auto str = basic_string_view<typename S::char_type>(S());
|
||
|
|
if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
|
||
|
|
const auto& first = detail::first(args...);
|
||
|
|
if constexpr (detail::is_named_arg<
|
||
|
|
remove_cvref_t<decltype(first)>>::value) {
|
||
|
|
return fmt::to_string(first.value);
|
||
|
|
} else {
|
||
|
|
return fmt::to_string(first);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
constexpr auto compiled = detail::compile<Args...>(S());
|
||
|
|
if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
|
||
|
|
detail::unknown_format>()) {
|
||
|
|
return format(static_cast<basic_string_view<typename S::char_type>>(S()),
|
||
|
|
std::forward<Args>(args)...);
|
||
|
|
} else {
|
||
|
|
return format(compiled, std::forward<Args>(args)...);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename OutputIt, typename S, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
|
||
|
|
constexpr auto compiled = detail::compile<Args...>(S());
|
||
|
|
if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
|
||
|
|
detail::unknown_format>()) {
|
||
|
|
return format_to(out,
|
||
|
|
static_cast<basic_string_view<typename S::char_type>>(S()),
|
||
|
|
std::forward<Args>(args)...);
|
||
|
|
} else {
|
||
|
|
return format_to(out, compiled, std::forward<Args>(args)...);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
template <typename OutputIt, typename S, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
|
||
|
|
const S& format_str, Args&&... args) {
|
||
|
|
auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), format_str,
|
||
|
|
std::forward<Args>(args)...);
|
||
|
|
return {it.base(), it.count()};
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename S, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
size_t formatted_size(const S& format_str, const Args&... args) {
|
||
|
|
return format_to(detail::counting_iterator(), format_str, args...).count();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename S, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
void print(std::FILE* f, const S& format_str, const Args&... args) {
|
||
|
|
memory_buffer buffer;
|
||
|
|
format_to(std::back_inserter(buffer), format_str, args...);
|
||
|
|
detail::print(f, {buffer.data(), buffer.size()});
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename S, typename... Args,
|
||
|
|
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
|
||
|
|
void print(const S& format_str, const Args&... args) {
|
||
|
|
print(stdout, format_str, args...);
|
||
|
|
}
|
||
|
|
|
||
|
|
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
|
||
|
|
inline namespace literals {
|
||
|
|
template <detail_exported::fixed_string Str>
|
||
|
|
constexpr detail::udl_compiled_string<
|
||
|
|
remove_cvref_t<decltype(Str.data[0])>,
|
||
|
|
sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str>
|
||
|
|
operator""_cf() {
|
||
|
|
return {};
|
||
|
|
}
|
||
|
|
} // namespace literals
|
||
|
|
#endif
|
||
|
|
|
||
|
|
FMT_MODULE_EXPORT_END
|
||
|
|
FMT_END_NAMESPACE
|
||
|
|
|
||
|
|
#endif // FMT_COMPILE_H_
|