NAME¶

std::visit_format_arg - std::visit_format_arg

Synopsis¶

Defined in header <format>
template< class Visitor, class Context > (since C++20)
/* see below */ visit_format_arg( Visitor&& vis, (deprecated in C++26)
std::basic_format_arg<Context> arg );

Applies the visitor vis to the object contained in arg.

Equivalent to std::visit(std::forward<Visitor>(vis), value), where value is the
std::variant stored in arg.

Parameters¶

vis - a Callable that accepts every possible alternative from arg
arg - a std::basic_format_arg to be visited

Return value¶

The value returned by the selected invocation of the visitor.

Notes¶

As of C++26, std::visit_format_arg is deprecated in favor of the visit member
functions of std::basic_format_arg.

Example¶

This section is incomplete
Reason: no example

See also¶

make_format_args creates a type-erased object referencing all formatting arguments,
make_wformat_args convertible to format_args
(C++20) (function template)
(C++20)

Category:¶

* Todo no example