Return true if the specified lhs is ordered before the specified rhs optional object or lhs and rhs have the same value, and false otherwise. (See operator< and operator==.) Note that this function will fail to compile if t_LHS_TYPE and t_RHS_TYPE are not compatible. These functions can be called in constant expressions only if the bsl::optional's value type is not allocator-aware.
Declared in <bslstl_optional.h>
template<
class t_LHS_TYPE,
class t_RHS_TYPE>
constexpr
bool
operator<=(
bsl::optional<t_LHS_TYPE> const& lhs,
std::optional<t_RHS_TYPE> const& rhs);