[#BloombergLP-bdlb-operator_minus-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::operator&hyphen;
:relfileprefix: ../../
:mrdocs:

Return a copy of `iterator` regressed by the specified `offset`&period;

== Synopsis

Declared in `&lt;bdlb&lowbar;transformiterator&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;
    class FUNCTOR,
    class ITERATOR&gt;
xref:BloombergLP/bdlb/TransformIterator.adoc[bdlb::TransformIterator&lt;FUNCTOR, ITERATOR&gt;]
operator&hyphen;(
    xref:BloombergLP/bdlb/TransformIterator.adoc[TransformIterator&lt;FUNCTOR, ITERATOR&gt;] const& iterator,
    TransformIterator&lt;FUNCTOR, ITERATOR&gt;::difference&lowbar;type offset);
----

== Description

Return a copy of the specified `iterator` object with its underlying iterator regressed by the specified (signed) `offset` from that of `iterator`&period; The behavior is undefined if so regressing the underlying iterator is undefined&period;

== Return Value

a copy of `iterator` regressed by `offset`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *iterator*
| transform iterator to regress
| *offset*
| signed distance to regress
|===


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