Return an optional containing a value constructed from the arguments.

Synopsis

Declared in <bslstl_optional.h>

template<
    class t_TYPE,
    class t_ARG,
    class... t_ARGS>
constexpr
optional<t_TYPE>
make_optional(
    t_ARG&& arg,
    t_ARGS&&... args);

Description

Return an optional object containing a TYPE object created by invoking a bsl::optional in_place_t constructor with the specified arg and args as the constructor arguments. If t_TYPE uses an allocator, the default allocator will be used for the optional object. This function can be called in constant expressions only if t_TYPE is not allocator‐aware.

Return Value

optional containing a t_TYPE constructed from the arguments

Parameters

Name

Description

arg

argument forwarded to construct the contained value

args

arguments forwarded to construct the contained value

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