This class provides an STL‐compliant basic_format_arg which holds (by value for scalar and pointer types, by reference for user‐defined types). These types should not be constructed directly by the user.

Synopsis

Declared in <bslfmt_format_arg.h>

template<
    class t_OUT,
    class t_CHAR>
class basic_format_arg<basic_format_context<t_OUT, t_CHAR>>;

Types

Name

Description

handle

This class provides a type‐erased wrapper which holds a pointer to a user‐defined type and permits its formatting using the appropriate bsl::formatter type.

Type Aliases

Name

BoolType

UnspecifiedBoolType

Member Functions

Name

Description

basic_format_arg [constructor]

Create a basic_format_arg which holds a bsl::monostate.

visit

Invoke the specified visitor functor on the value contained by this object, providing that functor non‐modifiable access to that value. visitor must be a variant‐style functor that is able to visit all supported types listed in the {DESCRIPTION}.

operator BoolType

Return whether this object holds a value.

Friends

Name

Description

BloombergLP::bslfmt::swap

Exchange the values of the specified lhs and rhs.

BloombergLP::bslfmt::Format_ArgUtil

This class provides utility functions to enable manipulation of types declared by this component. It is solely for private use by other components of the bslfmt package and should not be used directly.

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