Return this optional if engaged; otherwise invoke func.
Synopses
Declared in <bslstl_optional.h>
Return this optional if engaged; otherwise invoke func.
template<class t_FUNC>
constexpr
optional<t_TYPE>
or_else(t_FUNC&& func) const &
requires conjunction_v<std::is_invocable<t_FUNC>,
std::is_copy_constructible<t_TYPE>>;Return this optional if engaged; otherwise invoke func.
template<class t_FUNC>
constexpr
optional<t_TYPE>
or_else(t_FUNC&& func) &&
requires conjunction_v<std::is_invocable<t_FUNC>,
std::is_move_constructible<t_TYPE>>;Return Value
this optional if engaged, otherwise the result of func
Parameters
Name |
Description |
func |
callable invoked with the contained value or when empty |
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