[#BloombergLP-bdlb-operator_lt-02d]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::operator<
:relfileprefix: ../../
:mrdocs:

If neither of the specified `lhs` and `rhs` contain a value, return `false`. If `lhs` contains a value, and `rhs` does not, return `false`. If `lhs` does not contains a value, `rhs` does, return `true`. Otherwise, return `lhs.value < rhs.value()`.

== Synopsis

Declared in `<bdlb_nullableallocatedvalue.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class LHS_TYPE,
    class RHS_TYPE>
bool
operator<(
    xref:BloombergLP/bdlb/NullableAllocatedValue.adoc[NullableAllocatedValue<LHS_TYPE>] const& lhs,
    xref:bsl/optional-072.adoc[bsl::optional<RHS_TYPE>] const& rhs);
----


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