std:: visit_format_arg
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Standard format specification | ||||
Formatting functions | ||||
(C++20)
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(C++20)
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(C++20)
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(C++20)
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(C++20)
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(C++20)
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Format strings | ||||
(C++20)
(C++20)
(C++20)
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(C++26)
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Formatting concepts | ||||
(C++23)
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Formatter | ||||
(C++20)
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(C++23)
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(C++23)
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(C++23)
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(C++20)
(C++20)
(C++20)
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(C++20)
(C++20)
(C++20)
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(C++23)
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(C++23)
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Formatting arguments | ||||
(C++20)
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(C++20)
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(C++20)
(C++20)
(C++20)
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visit_format_arg
(C++20)
(deprecated in C++26)
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(C++20)
(C++20)
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Format error | ||||
(C++20)
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Defined in header
<format>
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template
<
class
Visitor,
class
Context
>
/* see below */ visit_format_arg ( Visitor && vis, std:: basic_format_arg < Context > arg ) ; |
(since C++20)
(deprecated in C++26) |
|
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
(C++20)
(C++20)
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creates a type-erased object referencing all formatting arguments, convertible to
format_args
(function template) |