Destroy any contained value and construct a new one in place.
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);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);reference providing modifiable access to the contained value
| 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 |