[#bsl-Deque_BlockProctor]
= xref:bsl.adoc[bsl]::Deque_BlockProctor
:relfileprefix: ../
:mrdocs:

This class implements a proctor that, upon destruction and unless its `release` method has previously been invoked, deallocates empty blocks at one end (i.e., front or back) of a proctored deque. The end at which empty blocks are to be proctored is indicated by a flag supplied at construction. See `emplace` for a use case.

== Synopsis

Declared in `<bslstl_deque.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class VALUE_TYPE,
    class ALLOCATOR>
class Deque_BlockProctor;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:bsl/Deque_BlockProctor/2constructor.adoc[`Deque_BlockProctor`]         [.small]#[constructor]#
| Create a block proctor object to proctor blocks at one end (i.e., front or back) of the specified `deque` as indicated by the specified `atFront` flag. If `atFront` is `true`, blocks at the front of `deque` are proctored; otherwise, blocks at the back of `deque` are proctored.
| xref:bsl/Deque_BlockProctor/2destructor.adoc[`~Deque_BlockProctor`] [.small]#[destructor]#
| Destroy this block proctor, and deallocate empty blocks at the back of the proctored deque as indicated by the `atFront` flag supplied at construction. If no deque is currently being managed, this method has no effect.
| xref:bsl/Deque_BlockProctor/release.adoc[`release`] 
| Release from management the deque currently managed by this proctor. If no deque is currently being managed, this method has no effect.
|===



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