Destroy any contained value and construct a new one in place.

Synopses

Declared in <bslstl_optional.h>

Destroy any contained value and construct a new one in place.

template<class... t_ARGS>
t_TYPE&
emplace(
    bslma::Allocator* allocator,
    t_ARGS&&... args);

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Destroy any contained value and construct a new one in place.

template<
    class t_INIT_LIST_TYPE,
    class... t_ARGS>
t_TYPE&
emplace(
    bslma::Allocator* allocator,
    std::initializer_list<t_INIT_LIST_TYPE> initializer_list,
    t_ARGS&&... args);

» more...

Return Value

reference providing modifiable access to the contained value

Parameters

Name

Description

allocator

allocator used to supply memory

args

arguments forwarded to construct the contained value

initializer_list

initializer list forwarded to construct the contained value

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