Return whether lhs is null.
Declared in <bdlb_nullablevalueref.h>
template<class TYPE>
bool
operator<=(
NullableValueRef<TYPE> const& lhs,
bsl::nullopt_t const& rhs) noexcept;Return true if the specified lhs is null, and false otherwise.
true if the specified lhs is null, and false otherwise
| Name | Description |
|---|---|
| lhs | nullable reference to test |
| rhs | nullopt sentinel |