[#BloombergLP-bslstl-operator_dec-05]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::operator‐‐
:relfileprefix: ../../
:mrdocs:

Regress `iter` to the previous element and return its previous value.

== Synopsis

Declared in `<bslstl_randomaccessiterator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class T,
    class ITER_IMP,
    class TAG_TYPE>
xref:BloombergLP/bslstl/RandomAccessIterator.adoc[bslstl::RandomAccessIterator<T, ITER_IMP, TAG_TYPE>]
operator‐‐(
    xref:BloombergLP/bslstl/RandomAccessIterator.adoc[RandomAccessIterator<T, ITER_IMP, TAG_TYPE>]& iter,
    int postfix);
----

== Description

Decrement the specified `iter` to previous element. Return the previous value of `iter`. The behavior is undefined if, on entry, `iter` has the same value as an iterator to the start of the underlying sequence.

== Return Value

previous value of `iter` before the decrement

== Parameters

[cols="1,4"]
|===
| Name| Description
| *iter*
| iterator to regress
| *postfix*
| unused parameter distinguishing the postfix operator
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#