[#CompareIteratorByHash-operator_call-0e]
= xref:CompareIteratorByHash.adoc[CompareIteratorByHash]::operator()
:relfileprefix: ../
:mrdocs:

Compares two wrapped entries by transaction hash.

== Synopsis

Declared in `<kernel/mempool_entry.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
bool
operator()(
    std::reference_wrapper<T> const& a,
    std::reference_wrapper<T> const& b) const;
----

== Return Value

`true` if `a`'s transaction hash is less than `b`'s.

== Parameters

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


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