Return true if the specified lhs optional object is ordered before the specified rhs optional object or if lhs and rhs have the same value, and false otherwise. (See operator< and operator==.) This function can be called in constant expressions only if neither t_LHS_TYPE nor t_RHS_TYPE is allocator‐aware.

Synopsis

Declared in <bslstl_optional.h>

template<
    class t_LHS_TYPE,
    class t_RHS_TYPE>
constexpr
bool
operator<=(
    bsl::optional<t_LHS_TYPE> const& lhs,
    bsl::optional<t_RHS_TYPE> const& rhs);

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