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Upgrade {fmt} to 8.0.0 to address issue with build on Debian bullseye: https://github.com/fmtlib/fmt/issues/2261

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error: no matching function for call to 'compile<int, int, int,
int>(build_ipv4_address_from_array(std::array<unsigned char, 4>,
std::string&)::<lambda()>::FMT_COMPILE_STRING)'
   648 |   constexpr auto compiled = detail::compile<Args...>(S());
       |                             ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
This commit is contained in:
Pavel Odintsov 2022-05-03 17:12:01 +01:00
parent 198c668a12
commit 21bb13bdc3
4 changed files with 4156 additions and 4647 deletions
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834
src/fmt/compile.h
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@ -8,13 +8,135 @@
#ifndef FMT_COMPILE_H_
#define FMT_COMPILE_H_
#include <vector>
#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 {};
@ -34,335 +156,29 @@ struct is_compiled_string : std::is_base_of<compiled_string, S> {};
std::string s = fmt::format(FMT_COMPILE("{}"), 42);
\endrst
*/
#define FMT_COMPILE(s) FMT_STRING_IMPL(s, fmt::detail::compiled_string)
#ifdef __cpp_if_constexpr
# 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;
}
// Part of a compiled format string. It can be either literal text or a
// replacement field.
template <typename Char> struct format_part {
enum class kind { arg_index, arg_name, text, replacement };
struct replacement {
arg_ref<Char> arg_id;
dynamic_format_specs<Char> specs;
};
kind part_kind;
union value {
int arg_index;
basic_string_view<Char> str;
replacement repl;
FMT_CONSTEXPR value(int index = 0) : arg_index(index) {}
FMT_CONSTEXPR value(basic_string_view<Char> s) : str(s) {}
FMT_CONSTEXPR value(replacement r) : repl(r) {}
} val;
// Position past the end of the argument id.
const Char* arg_id_end = nullptr;
FMT_CONSTEXPR format_part(kind k = kind::arg_index, value v = {})
: part_kind(k), val(v) {}
static FMT_CONSTEXPR format_part make_arg_index(int index) {
return format_part(kind::arg_index, index);
}
static FMT_CONSTEXPR format_part make_arg_name(basic_string_view<Char> name) {
return format_part(kind::arg_name, name);
}
static FMT_CONSTEXPR format_part make_text(basic_string_view<Char> text) {
return format_part(kind::text, text);
}
static FMT_CONSTEXPR format_part make_replacement(replacement repl) {
return format_part(kind::replacement, repl);
}
};
template <typename Char> struct part_counter {
unsigned num_parts = 0;
FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
if (begin != end) ++num_parts;
}
FMT_CONSTEXPR int on_arg_id() { return ++num_parts, 0; }
FMT_CONSTEXPR int on_arg_id(int) { return ++num_parts, 0; }
FMT_CONSTEXPR int on_arg_id(basic_string_view<Char>) {
return ++num_parts, 0;
}
FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
const Char* end) {
// Find the matching brace.
unsigned brace_counter = 0;
for (; begin != end; ++begin) {
if (*begin == '{') {
++brace_counter;
} else if (*begin == '}') {
if (brace_counter == 0u) break;
--brace_counter;
}
}
return begin;
}
FMT_CONSTEXPR void on_error(const char*) {}
};
// Counts the number of parts in a format string.
template <typename Char>
FMT_CONSTEXPR unsigned count_parts(basic_string_view<Char> format_str) {
part_counter<Char> counter;
parse_format_string<true>(format_str, counter);
return counter.num_parts;
}
template <typename Char, typename PartHandler>
class format_string_compiler : public error_handler {
private:
using part = format_part<Char>;
PartHandler handler_;
part part_;
basic_string_view<Char> format_str_;
basic_format_parse_context<Char> parse_context_;
public:
FMT_CONSTEXPR format_string_compiler(basic_string_view<Char> format_str,
PartHandler handler)
: handler_(handler),
format_str_(format_str),
parse_context_(format_str) {}
FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
if (begin != end)
handler_(part::make_text({begin, to_unsigned(end - begin)}));
}
FMT_CONSTEXPR int on_arg_id() {
part_ = part::make_arg_index(parse_context_.next_arg_id());
return 0;
}
FMT_CONSTEXPR int on_arg_id(int id) {
parse_context_.check_arg_id(id);
part_ = part::make_arg_index(id);
return 0;
}
FMT_CONSTEXPR int on_arg_id(basic_string_view<Char> id) {
part_ = part::make_arg_name(id);
return 0;
}
FMT_CONSTEXPR void on_replacement_field(int, const Char* ptr) {
part_.arg_id_end = ptr;
handler_(part_);
}
FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
const Char* end) {
auto repl = typename part::replacement();
dynamic_specs_handler<basic_format_parse_context<Char>> handler(
repl.specs, parse_context_);
auto it = parse_format_specs(begin, end, handler);
if (*it != '}') on_error("missing '}' in format string");
repl.arg_id = part_.part_kind == part::kind::arg_index
? arg_ref<Char>(part_.val.arg_index)
: arg_ref<Char>(part_.val.str);
auto part = part::make_replacement(repl);
part.arg_id_end = begin;
handler_(part);
return it;
}
};
// Compiles a format string and invokes handler(part) for each parsed part.
template <bool IS_CONSTEXPR, typename Char, typename PartHandler>
FMT_CONSTEXPR void compile_format_string(basic_string_view<Char> format_str,
PartHandler handler) {
parse_format_string<IS_CONSTEXPR>(
format_str,
format_string_compiler<Char, PartHandler>(format_str, handler));
}
template <typename OutputIt, typename Context, typename Id>
void format_arg(
basic_format_parse_context<typename Context::char_type>& parse_ctx,
Context& ctx, Id arg_id) {
ctx.advance_to(visit_format_arg(
arg_formatter<OutputIt, typename Context::char_type>(ctx, &parse_ctx),
ctx.arg(arg_id)));
}
// vformat_to is defined in a subnamespace to prevent ADL.
namespace cf {
template <typename Context, typename OutputIt, typename CompiledFormat>
auto vformat_to(OutputIt out, CompiledFormat& cf,
basic_format_args<Context> args) -> typename Context::iterator {
using char_type = typename Context::char_type;
basic_format_parse_context<char_type> parse_ctx(
to_string_view(cf.format_str_));
Context ctx(out, args);
const auto& parts = cf.parts();
for (auto part_it = std::begin(parts); part_it != std::end(parts);
++part_it) {
const auto& part = *part_it;
const auto& value = part.val;
using format_part_t = format_part<char_type>;
switch (part.part_kind) {
case format_part_t::kind::text: {
const auto text = value.str;
auto output = ctx.out();
auto&& it = reserve(output, text.size());
it = std::copy_n(text.begin(), text.size(), it);
ctx.advance_to(output);
break;
}
case format_part_t::kind::arg_index:
advance_to(parse_ctx, part.arg_id_end);
detail::format_arg<OutputIt>(parse_ctx, ctx, value.arg_index);
break;
case format_part_t::kind::arg_name:
advance_to(parse_ctx, part.arg_id_end);
detail::format_arg<OutputIt>(parse_ctx, ctx, value.str);
break;
case format_part_t::kind::replacement: {
const auto& arg_id_value = value.repl.arg_id.val;
const auto arg = value.repl.arg_id.kind == arg_id_kind::index
? ctx.arg(arg_id_value.index)
: ctx.arg(arg_id_value.name);
auto specs = value.repl.specs;
handle_dynamic_spec<width_checker>(specs.width, specs.width_ref, ctx);
handle_dynamic_spec<precision_checker>(specs.precision,
specs.precision_ref, ctx);
error_handler h;
numeric_specs_checker<error_handler> checker(h, arg.type());
if (specs.align == align::numeric) checker.require_numeric_argument();
if (specs.sign != sign::none) checker.check_sign();
if (specs.alt) checker.require_numeric_argument();
if (specs.precision >= 0) checker.check_precision();
advance_to(parse_ctx, part.arg_id_end);
ctx.advance_to(
visit_format_arg(arg_formatter<OutputIt, typename Context::char_type>(
ctx, nullptr, &specs),
arg));
break;
}
}
}
return ctx.out();
}
} // namespace cf
struct basic_compiled_format {};
template <typename S, typename = void>
struct compiled_format_base : basic_compiled_format {
using char_type = char_t<S>;
using parts_container = std::vector<detail::format_part<char_type>>;
parts_container compiled_parts;
explicit compiled_format_base(basic_string_view<char_type> format_str) {
compile_format_string<false>(format_str,
[this](const format_part<char_type>& part) {
compiled_parts.push_back(part);
});
}
const parts_container& parts() const { return compiled_parts; }
};
template <typename Char, unsigned N> struct format_part_array {
format_part<Char> data[N] = {};
FMT_CONSTEXPR format_part_array() = default;
};
template <typename Char, unsigned N>
FMT_CONSTEXPR format_part_array<Char, N> compile_to_parts(
basic_string_view<Char> format_str) {
format_part_array<Char, N> parts;
unsigned counter = 0;
// This is not a lambda for compatibility with older compilers.
struct {
format_part<Char>* parts;
unsigned* counter;
FMT_CONSTEXPR void operator()(const format_part<Char>& part) {
parts[(*counter)++] = part;
}
} collector{parts.data, &counter};
compile_format_string<true>(format_str, collector);
if (counter < N) {
parts.data[counter] =
format_part<Char>::make_text(basic_string_view<Char>());
}
return parts;
}
template <typename T> constexpr const T& constexpr_max(const T& a, const T& b) {
return (a < b) ? b : a;
}
template <typename S>
struct compiled_format_base<S, enable_if_t<is_compile_string<S>::value>>
: basic_compiled_format {
using char_type = char_t<S>;
FMT_CONSTEXPR explicit compiled_format_base(basic_string_view<char_type>) {}
// Workaround for old compilers. Format string compilation will not be
// performed there anyway.
#if FMT_USE_CONSTEXPR
static FMT_CONSTEXPR_DECL const unsigned num_format_parts =
constexpr_max(count_parts(to_string_view(S())), 1u);
#else
static const unsigned num_format_parts = 1;
#endif
using parts_container = format_part<char_type>[num_format_parts];
const parts_container& parts() const {
static FMT_CONSTEXPR_DECL const auto compiled_parts =
compile_to_parts<char_type, num_format_parts>(
detail::to_string_view(S()));
return compiled_parts.data;
}
};
template <typename S, typename... Args>
class compiled_format : private compiled_format_base<S> {
public:
using typename compiled_format_base<S>::char_type;
private:
basic_string_view<char_type> format_str_;
template <typename Context, typename OutputIt, typename CompiledFormat>
friend auto cf::vformat_to(OutputIt out, CompiledFormat& cf,
basic_format_args<Context> args) ->
typename Context::iterator;
public:
compiled_format() = delete;
explicit constexpr compiled_format(basic_string_view<char_type> format_str)
: compiled_format_base<S>(format_str), format_str_(format_str) {}
};
#ifdef __cpp_if_constexpr
template <typename... Args> struct type_list {};
@ -377,6 +193,12 @@ constexpr const auto& get([[maybe_unused]] const T& first,
return 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...>> {
@ -393,7 +215,7 @@ template <typename Char> struct text {
using char_type = Char;
template <typename OutputIt, typename... Args>
OutputIt format(OutputIt out, const Args&...) const {
constexpr OutputIt format(OutputIt out, const Args&...) const {
return write<Char>(out, data);
}
};
@ -412,11 +234,22 @@ template <typename Char> struct code_unit {
using char_type = Char;
template <typename OutputIt, typename... Args>
OutputIt format(OutputIt out, const Args&...) const {
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 = 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 {};
@ -425,29 +258,58 @@ template <typename Char, typename T, int N> struct field {
using char_type = Char;
template <typename OutputIt, typename... Args>
OutputIt format(OutputIt out, const Args&... args) const {
// This ensures that the argument type is convertile to `const T&`.
const T& arg = get<N>(args...);
return write<Char>(out, arg);
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) {
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;
mutable formatter<T, Char> fmt;
formatter<T, Char> fmt;
template <typename OutputIt, typename... Args>
OutputIt format(OutputIt out, const Args&... args) const {
// This ensures that the argument type is convertile to `const T&`.
const T& arg = get<N>(args...);
constexpr FMT_INLINE OutputIt format(OutputIt out,
const Args&... args) const {
const auto& vargs =
make_format_args<basic_format_context<OutputIt, Char>>(args...);
fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
basic_format_context<OutputIt, Char> ctx(out, vargs);
return fmt.format(arg, ctx);
return fmt.format(get_arg_checked<T, N>(args...), ctx);
}
};
@ -460,7 +322,7 @@ template <typename L, typename R> struct concat {
using char_type = typename L::char_type;
template <typename OutputIt, typename... Args>
OutputIt format(OutputIt out, const Args&... args) const {
constexpr OutputIt format(OutputIt out, const Args&... args) const {
out = lhs.format(out, args...);
return rhs.format(out, args...);
}
@ -508,14 +370,77 @@ template <typename T, typename Char> struct parse_specs_result {
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 arg_id) {
size_t pos, int next_arg_id) {
str.remove_prefix(pos);
auto ctx = basic_format_parse_context<Char>(str, {}, arg_id + 1);
auto ctx = basic_format_parse_context<Char>(str, {}, next_arg_id);
auto f = formatter<T, Char>();
auto end = f.parse(ctx);
return {f, pos + (end - str.data()) + 1, ctx.next_arg_id()};
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) { 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
@ -523,26 +448,58 @@ constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
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 basic_string_view<char_type> str = format_str;
constexpr auto str = basic_string_view<char_type>(format_str);
if constexpr (str[POS] == '{') {
if (POS + 1 == str.size())
if constexpr (POS + 1 == str.size())
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] == '}') {
using type = get_type<ID, Args>;
return parse_tail<Args, POS + 2, ID + 1>(field<char_type, type, ID>(),
format_str);
} else if constexpr (str[POS + 1] == ':') {
using type = get_type<ID, Args>;
constexpr auto result = parse_specs<type>(str, POS + 2, ID);
return parse_tail<Args, result.end, result.next_arg_id>(
spec_field<char_type, type, ID>{result.fmt}, 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 {
return unknown_format();
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 (POS + 1 == str.size())
if constexpr (POS + 1 == str.size())
throw format_error("unmatched '}' in format string");
return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
} else {
@ -558,144 +515,125 @@ constexpr auto compile_format_string(S format_str) {
}
template <typename... Args, typename S,
FMT_ENABLE_IF(is_compile_string<S>::value ||
detail::is_compiled_string<S>::value)>
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
constexpr auto compile(S format_str) {
constexpr basic_string_view<typename S::char_type> str = 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);
if constexpr (std::is_same<remove_cvref_t<decltype(result)>,
detail::unknown_format>()) {
return detail::compiled_format<S, Args...>(to_string_view(format_str));
} else {
return result;
}
return result;
}
}
#else
template <typename... Args, typename S,
FMT_ENABLE_IF(is_compile_string<S>::value)>
constexpr auto compile(S format_str) -> detail::compiled_format<S, Args...> {
return detail::compiled_format<S, Args...>(to_string_view(format_str));
}
#endif // __cpp_if_constexpr
// Compiles the format string which must be a string literal.
template <typename... Args, typename Char, size_t N>
auto compile(const Char (&format_str)[N])
-> detail::compiled_format<const Char*, Args...> {
return detail::compiled_format<const Char*, Args...>(
basic_string_view<Char>(format_str, N - 1));
}
} // namespace detail
// DEPRECATED! use FMT_COMPILE instead.
template <typename... Args>
FMT_DEPRECATED auto compile(const Args&... args)
-> decltype(detail::compile(args...)) {
return detail::compile(args...);
}
FMT_MODULE_EXPORT_BEGIN
#if FMT_USE_CONSTEXPR
# ifdef __cpp_if_constexpr
#ifdef __cpp_if_constexpr
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) {
basic_memory_buffer<Char> buffer;
cf.format(detail::buffer_appender<Char>(buffer), args...);
return to_string(buffer);
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)>
OutputIt format_to(OutputIt out, const CompiledFormat& cf,
const Args&... args) {
constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
const Args&... args) {
return cf.format(out, args...);
}
# endif // __cpp_if_constexpr
#endif // FMT_USE_CONSTEXPR
template <typename CompiledFormat, typename... Args,
typename Char = typename CompiledFormat::char_type,
FMT_ENABLE_IF(std::is_base_of<detail::basic_compiled_format,
CompiledFormat>::value)>
std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
basic_memory_buffer<Char> buffer;
using context = buffer_context<Char>;
detail::cf::vformat_to<context>(detail::buffer_appender<Char>(buffer), cf,
make_format_args<context>(args...));
return to_string(buffer);
}
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) {
#ifdef __cpp_if_constexpr
if constexpr (std::is_same<typename S::char_type, char>::value) {
constexpr basic_string_view<typename S::char_type> str = S();
if (str.size() == 2 && str[0] == '{' && str[1] == '}')
return fmt::to_string(detail::first(args...));
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
constexpr auto compiled = detail::compile<Args...>(S());
return format(compiled, std::forward<Args>(args)...);
}
template <typename OutputIt, typename CompiledFormat, typename... Args,
FMT_ENABLE_IF(std::is_base_of<detail::basic_compiled_format,
CompiledFormat>::value)>
OutputIt format_to(OutputIt out, const CompiledFormat& cf,
const Args&... args) {
using char_type = typename CompiledFormat::char_type;
using context = format_context_t<OutputIt, char_type>;
return detail::cf::vformat_to<context>(out, cf,
make_format_args<context>(args...));
}
template <typename OutputIt, typename S, typename... Args,
FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
OutputIt format_to(OutputIt out, const S&, const Args&... args) {
constexpr auto compiled = detail::compile<Args...>(S());
return format_to(out, compiled, args...);
}
template <typename OutputIt, typename CompiledFormat, typename... Args>
auto format_to_n(OutputIt out, size_t n, const CompiledFormat& cf,
const Args&... args) ->
typename std::enable_if<
detail::is_output_iterator<OutputIt,
typename CompiledFormat::char_type>::value &&
std::is_base_of<detail::basic_compiled_format,
CompiledFormat>::value,
format_to_n_result<OutputIt>>::type {
auto it =
format_to(detail::truncating_iterator<OutputIt>(out, n), cf, args...);
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 OutputIt, typename S, typename... Args,
template <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&,
const Args&... args) {
constexpr auto compiled = detail::compile<Args...>(S());
auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), compiled,
args...);
return {it.base(), it.count()};
size_t formatted_size(const S& format_str, const Args&... args) {
return format_to(detail::counting_iterator(), format_str, args...).count();
}
template <typename CompiledFormat, typename... Args>
size_t formatted_size(const CompiledFormat& cf, const Args&... args) {
return format_to(detail::counting_iterator(), cf, 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_

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