[#BloombergLP-bslstl-operator_dec-00]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::operator‐‐
:relfileprefix: ../../
:mrdocs:

Decrement operators

== Synopses

Declared in `<bslstl_bidirectionaliterator.h>`

Post‐decrement the specified iterator and return its previous value.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class T,
    class ITER_IMP,
    class TAG_TYPE>
xref:BloombergLP/bslstl/BidirectionalIterator.adoc[bslstl::BidirectionalIterator<T, ITER_IMP, TAG_TYPE>]
xref:BloombergLP/bslstl/operator_dec-08.adoc[operator‐‐](
    xref:BloombergLP/bslstl/BidirectionalIterator.adoc[BidirectionalIterator<T, ITER_IMP, TAG_TYPE>]& iter,
    int unused);
----

[.small]#xref:BloombergLP/bslstl/operator_dec-08.adoc[_» more..._]#

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


[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>]
xref:BloombergLP/bslstl/operator_dec-05.adoc[operator‐‐](
    xref:BloombergLP/bslstl/RandomAccessIterator.adoc[RandomAccessIterator<T, ITER_IMP, TAG_TYPE>]& iter,
    int postfix);
----

[.small]#xref:BloombergLP/bslstl/operator_dec-05.adoc[_» more..._]#

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


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class VALUE,
    class NODE,
    class DIFFERENCE_TYPE>
xref:BloombergLP/bslstl/TreeIterator.adoc[TreeIterator<VALUE, NODE, DIFFERENCE_TYPE>]
xref:BloombergLP/bslstl/operator_dec-03.adoc[operator‐‐](
    xref:BloombergLP/bslstl/TreeIterator.adoc[TreeIterator<VALUE, NODE, DIFFERENCE_TYPE>]& iter,
    int postfix);
----

[.small]#xref:BloombergLP/bslstl/operator_dec-03.adoc[_» more..._]#

== Return Value

* previous value of `iter`
* previous value of `iter` before the decrement

== Parameters

[cols="1,4"]
|===
| Name| Description
| *iter*
| iterator to decrement
| *unused*
| ignored; distinguishes post‐decrement
| *postfix*
| unused parameter distinguishing the postfix operator
|===


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