[#operator_lt-0e]
= operator<
:mrdocs:

Order two extended public keys by public key, then by chain code.

== Synopsis

Declared in `<pubkey.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
operator<(
    xref:CExtPubKey.adoc[CExtPubKey] const& a,
    xref:CExtPubKey.adoc[CExtPubKey] const& b);
----

== Return Value

true if a sorts before b.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| The left‐hand extended public key.
| *b*
| The right‐hand extended public key.
|===


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