Return an optional containing a value constructed from the arguments.
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);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.
optional containing a t_TYPE constructed from the arguments
| Name | Description |
|---|---|
| arg | argument forwarded to construct the contained value |
| args | arguments forwarded to construct the contained value |