[#operator_eq-005]
= operator==
:mrdocs:

Compare two extended keys for equality of all fields.

== Synopsis

Declared in `<key.h>`

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

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

== Return Value

true if all fields are equal.

== Parameters

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


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