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std::vformat(3) C++ Standard Libary std::vformat(3) NAME std::vformat - std::vformat Synopsis Defined in header <format> std::string vformat(std::string_view fmt, std::format_args args); (1) (since C++20) std::wstring vformat(std::wstring_view fmt, std::wformat_args (2) (since C++20) args); std::string vformat(const std::locale& loc, std::string_view fmt, (3) (since C++20) std::format_args args); std::wstring vformat(const std::locale& loc, std::wstring_view (4) (since C++20) fmt, std::wformat_args args); 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 for- matting. Parameters string view representing the format string. The format string consists of * ordinary characters (except { and }), which are copied unchanged to the output, * escape sequences {{ and }}, which are replaced with { and } respectively in the output, and * replacement fields. Each replacement field has the following format: { arg-id (optional) } (1) { arg-id (optional) : format-spec } (2) 1) replacement field without a format specification 2) replacement field with a format specification fmt - specifies the index of the argument in args whose value is to be used for formatting; if it is omitted, the arguments are arg-id - used in order. The arg-ids in a format string must all be present or all be omitted. Mixing manual and automatic indexing is an error. format-spec - the format specification defined by the std::formatter specialization for the corresponding argument. * For basic types and standard string types, the format specification is interpreted as standard format specification. * For chrono types, the format specification is interpreted as chrono format specification. * For other formattable types, the format specification is determined by user-defined formatter specializations. args - arguments to be formatted loc - std::locale used for locale-specific formatting Return value A string object holding the formatted result. Exceptions Throws std::format_error if fmt is not a valid format string for the provided arguments, or std::bad_alloc on allocation failure. Also propagates any exception thrown by formatter or iterator operations. Example This section is incomplete Reason: no example See also http://cppreference.com 2022.07.31 std::vformat(3)
NAME | Synopsis | Parameters | Return value | Exceptions | Example | See also
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