[#BloombergLP-bdlb-TransformIterator_AllocatorOfIteratorMethod-00]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::TransformIterator_AllocatorOfIteratorMethod
:relfileprefix: ../../
:mrdocs:

Base class template that optionally provides an `allocator` method.

== Synopsis

Declared in `<bdlb_transformiterator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class BASE_TYPE,
    bool>
struct TransformIterator_AllocatorOfIteratorMethod;
----

== Description

The `TransformIterator_AllocatorOfIteratorMethod` class template has an allocator method when its boolean template parameter is `true`, which will be made to be the case when the iterator of the transform iterator uses allocators. The transform iterator type itself is supplied as `BASE_TYPE`.

== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlb/TransformIterator_AllocatorOfIteratorMethod-0f.adoc[`TransformIterator_AllocatorOfIteratorMethod<BASE_TYPE, true>`] 
| Base providing `allocator` when the underlying iterator uses allocators.
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlb/TransformIterator.adoc[`TransformIterator`] 
| Wrapping iterator that invokes a functor on dereference.
|===


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