Return true if lhs is less than rhs.

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);

Description

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 that of rhs, or if lhs is valueless by exception and rhs is not; otherwise, return false. All alternatives shall support operator<.

Return Value

true if lhs is less than rhs

Parameters

Name

Description

lhs

variant to compare

rhs

variant to compare

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