[#BloombergLP-bdlb-operator_minus-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::operator‐
:relfileprefix: ../../
:mrdocs:

Subtraction operators

== Synopses

Declared in `<bdlb_transformiterator.h>`

Return the distance from the underlying iterator of `b` to that of `a`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class FUNCTOR,
    class ITERATOR>
bdlb::TransformIterator<FUNCTOR, ITERATOR>::difference_type
xref:BloombergLP/bdlb/operator_minus-04.adoc[operator‐](
    xref:BloombergLP/bdlb/TransformIterator.adoc[TransformIterator<FUNCTOR, ITERATOR>] const& a,
    xref:BloombergLP/bdlb/TransformIterator.adoc[TransformIterator<FUNCTOR, ITERATOR>] const& b);
----

[.small]#xref:BloombergLP/bdlb/operator_minus-04.adoc[_» more..._]#

Return a copy of `iterator` regressed by the specified `offset`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class FUNCTOR,
    class ITERATOR>
xref:BloombergLP/bdlb/TransformIterator.adoc[bdlb::TransformIterator<FUNCTOR, ITERATOR>]
xref:BloombergLP/bdlb/operator_minus-09.adoc[operator‐](
    xref:BloombergLP/bdlb/TransformIterator.adoc[TransformIterator<FUNCTOR, ITERATOR>] const& iterator,
    TransformIterator<FUNCTOR, ITERATOR>::difference_type offset);
----

[.small]#xref:BloombergLP/bdlb/operator_minus-09.adoc[_» more..._]#

== Return Value

* the distance from the underlying iterator of `b` to that of `a`
* a copy of `iterator` regressed by `offset`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| left‐hand operand
| *b*
| right‐hand operand
| *iterator*
| transform iterator to regress
| *offset*
| signed distance to regress
|===


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