Destroy any contained value and construct a new one in place.
Declared in <bslstl_optional.h>
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);Create an object of StoredType in d_buffer using the specified allocator, initializer_list, and args, and return a reference providing modifiable access to the underlying t_TYPE object.
reference providing modifiable access to the contained value
| Name | Description |
|---|---|
| allocator | allocator used to supply memory |
| initializer_list | initializer list forwarded to construct the contained value |
| args | arguments forwarded to construct the contained value |