Return true if the index of the active alternative in the specified lhs is less than that of the specified rhs, or if both have the same active alternative and the contained value of lhs compares less than or equal to that of rhs, or if lhs is valueless by exception; otherwise, return false. All alternatives shall support operator<=.

Synopsis

Declared in <bslstl_variant.h>

template<
    class t_HEAD,
    class... t_TAIL>
bool
operator<=(
    variant<t_HEAD, t_TAIL...> const& lhs,
    variant<t_HEAD, t_TAIL...> const& rhs);

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