[#bsl-operator_lt-0c]
= xref:bsl.adoc[bsl]::operator<
:relfileprefix: ../
:mrdocs:

Return `true` if the value of the specified `lhs` stack is lexicographically less than that of the specified `rhs` stack, and `false` otherwise. Given iterators `i` and `j` over the respective sequences `[lhs.begin() .. lhs.end())]` and `[rhs.begin() .. rhs.end())]`, the value of stack `lhs` is lexicographically less than that of stack `rhs` if `true == *i < *j` for the first pair of corresponding iterator positions where `*i < *j` and `*j < *i` are not both `false`. If no such corresponding iterator position exists, the value of `lhs` is lexicographically less than that of `rhs` if `lhs.size() < rhs.size()`. This method requires that `operator<`, inducing a total order, be defined for `value_type`.

== Synopsis

Declared in `<bslstl_stack.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class VALUE,
    class CONTAINER>
bool
operator<(
    xref:bsl/stack-05.adoc[stack<VALUE, CONTAINER>] const& lhs,
    xref:bsl/stack-05.adoc[stack<VALUE, CONTAINER>] const& rhs);
----


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