Global namespace

Namespaces

Name

fmt

fmt namespace

Namespaces

Name

enums

safe_duration_cast

Types

Name

Description

basic_appender

basic_cstring_view

A reference to a null‐terminated string. It can be constructed from a C string or std::string.

basic_format_arg

basic_format_args

A view of a collection of formatting arguments. To avoid lifetime issues it should only be used as a parameter type in type‐erased functions such as vformat:

basic_fstring

basic_memory_buffer

A dynamically growing memory buffer for trivially copyable/constructible types with the first SIZE elements stored in the object itself. Most commonly used via the memory_buffer alias for char.

basic_ostream_formatter

basic_printf_context

basic_specs

basic_string_view

An implementation of std::basic_string_view for pre‐C++17. It provides a subset of the API. fmt::basic_string_view is used for format strings even if std::basic_string_view is available to prevent issues when a library is compiled with a different ‐std option than the client code (which is not recommended).

conjunction<P1, Pn...>

context

day

dynamic_format_arg_store

A dynamic list of formatting arguments with storage.

file

format_error

An error reported from a formatting function.

format_facet

format_facet<locale>

format_int

A fast integer formatter.

formatter</* implementation-defined */>

formatter<bytes>

formatter<std::error_code>

formatter<std::source_location>

formatter<std::type_info>

formatter<group_digits_view<T>>

formatter<T, char>

formatter<std::atomic_flag, Char>

formatter<std::byte, Char>

formatter<day, Char>

formatter</* implementation-defined */, Char>

formatter<std::thread::id, Char>

formatter<std::monostate, Char>

formatter<month, Char>

formatter<std::nullptr_t, Char>

formatter<std::filesystem::path, Char>

formatter<tm, Char>

formatter<weekday, Char>

formatter<year, Char>

formatter<year_month_day, Char>

formatter</* implementation-defined */, Char>

formatter<signed char, Char>

formatter<unsigned char, Char>

formatter<short, Char>

formatter<unsigned short, Char>

formatter<long, Char>

formatter<unsigned long, Char>

formatter<Char*, Char>

formatter<void*, Char>

formatter<BitRef, Char>

formatter<R, Char>

formatter<T, Char>

formatter<Tuple, Char>

formatter<Variant, Char>

formatter<std::atomic<T>, Char>

formatter<std::bitset<N>, Char>

formatter<std::complex<T>, Char>

formatter<local_time<Duration>, Char>

formatter<nested_view<T, Char>, Char>

formatter<std::optional<T>, Char>

formatter<std::reference_wrapper<T>, Char>

formatter</* implementation-defined */, Char>

formatter<sys_time<Duration>, Char>

formatter<tuple_join_view<Tuple, Char>, Char>

formatter</* implementation-defined */, Char>

formatter<utc_time<Duration>, Char>

formatter<Char[, Char>]

formatter<std::basic_string<Char, Traits, Allocator>, Char>

formatter<std::chrono::duration<Rep, Period>, Char>

formatter<std::expected<T, E>, Char>

formatter<join_view<It, Sentinel, Char>, Char>

formatter<T, Char, void_t</* implementation-defined */>>

fstring

A compile‐time format string. Use format_string in the public API to prevent type deduction.

is_contiguous<basic_memory_buffer<T, SIZE, Allocator>>

is_contiguous<std::basic_string<Char, Traits, Allocator>>

is_range

is_tuple_formattable

Parsing context consisting of a format string range being parsed and an argument counter for automatic indexing.

parse_context<char>

path

range_format_kind

range_formatter

range_formatter<T, Char>

rgb

runtime_format_string

static_format_result

string_buffer

text_style

A text style consisting of foreground and background colors and emphasis.

basic_format_context

basic_format_parse_context

basic_format_string

format_parse_context

wformat_parse_context

Enums

Name

Functions

Name

Description

Unnamed overloads

arg

Returns a named argument to be used in a formatting function. It should only be used in a call to a formatting function.

assert_fail

bg

Creates a text style from the background color.

fg

Creates a text style from the foreground (text) color.

format

format overloads

format_system_error

Formats an error message for an error returned by an operating system or a language runtime, for example a file opening error, and writes it to out. The format is the same as the one used by std::system_error(ec, message) where ec is std::error_code(error_code, std::generic_category()). It is implementation‐defined but normally looks like:

format_to

format_to overloads

format_to_n

Formats args according to specifications in fmt, writes up to n characters of the result to the output iterator out and returns the total (not truncated) output size and the iterator past the end of the output range. format_to_n does not append a terminating null character.

formatted_size

Returns the number of chars in the output of format(fmt, args...).

fprintf

Formats args according to specifications in fmt and writes the output to f.

gmtime

Converts given time since epoch as std::time_t value into calendar time, expressed in Coordinated Universal Time (UTC). Unlike std::gmtime, this function is thread‐safe on most platforms.

group_digits

Returns a view that formats an integer value using ',' as a locale‐independent thousands separator.

join

join overloads

make_format_args

make_printf_args

Constructs an format_arg_store object that contains references to arguments and can be implicitly converted to printf_args.

Bitwise disjunction operators