Return true if lhs is ordered before rhs or they are equal.

Synopsis

Declared in <bdlb_nullablevalue.h>

template<
    class LHS_TYPE,
    class RHS_TYPE>
bool
operator<=(
    NullableValue<LHS_TYPE> const& lhs,
    bsl::optional<RHS_TYPE> const& rhs)
requires requires {
        { *lhs <= *rhs } ‐> NullableValue_ConvertibleToBool;
    };

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