[#absl-operator_lt-0c4]
= xref:absl.adoc[absl]::operator<
:relfileprefix: ../
:mrdocs:

Less‐than operator

== Synopsis

Declared in `<absl/container/btree_map.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
operator<(
    xref:absl/btree_map.adoc[btree_map] const& x,
    xref:absl/btree_map.adoc[btree_map] const& y);
----

[NOTE]
====
This function is a https://en.cppreference.com/w/cpp/language/friend[hidden friend] of xref:absl/btree_map.adoc[btree_map], declared inside its base class btree_container: it can be found only through argument-dependent lookup.
====

== Return Value

`true` if the left object is less than the right object, `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *x*
| The left operand
| *y*
| The right operand
|===


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