[#BloombergLP-bdlb-TransformIterator-operator_subs-0e]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/TransformIterator.adoc[TransformIterator]::operator[]
:relfileprefix: ../../../
:mrdocs:

Return the result of applying the functor of this object to the result of dereferencing the underlying iterator advanced by the specified (signed) `offset`. The behavior is undefined if so advancing or dereferencing the underlying iterator is undefined. Note that the behavior of this method is equivalent to: ` functor()(iterator()[offset]) `

== Synopsis

Declared in `<bdlb_transformiterator.h>`

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


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