Format args according to the format string fmt, and return the result as a string. If present, loc is used for locale-specific formatting.

Standard library header <format> (C++20) This header is part of the text processing library.

Format args according to the format string fmt, and write the result to the output iterator out. If present, loc is used for locale-specific formatting. Equivalent to:

For basic types and string types, the format specification is based on the format specification in Python. The syntax of format specifications is:

Format specification specifies how objects are formatted with different kinds of options. The formatting of objects of basic types and standard string types uses the basic format specification.

Format args according to the format string fmt, and write the result to the output iterator out. At most n characters are written. If present, loc is used for locale-specific formatting. Let CharT be char for …

std:: vformat ... Format arguments held by args according to the format string fmt, and return the result as a string. If present, loc is used for locale-specific formatting.

Formatters for other pointers and pointers to members are disabled. Specializations such as std::formatter<wchar_t, char> and std::formatter<const char*, wchar_t> that would require encoding …

The alias templates format_string and wformat_string use std::type_identity_t to inhibit template argument deduction. Typically, when they appear as a function parameter, their template arguments …

The concept formattable specifies that std::formatter<std::remove_cvref_t<T>, CharT> meets the requirements of BasicFormatter and Formatter (if std::remove_reference_t<T> is const-qualified). …