[#BloombergLP-bslma-StdTestAllocator-2constructor-0e]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::xref:BloombergLP/bslma/StdTestAllocator.adoc[StdTestAllocator]::StdTestAllocator
:relfileprefix: ../../../
:mrdocs:

Create a proxy that forwards to the specified `mechanism`.

== Synopsis

Declared in `<bslma_stdtestallocator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
StdTestAllocator(xref:BloombergLP/bslma/Allocator.adoc[Allocator]* mechanism);
----

== Description

Convert a `bslma::Allocator` pointer to a test allocator object which forwards allocation calls to the object pointed to by the specified `mechanism`. The `mechanism` must be a `bslma::TestAllocator` (or a type derived from it), or 0. If `mechanism` is 0, then the currently installed default allocator is used instead. Postcondition: `0 == mechanism || this‐>mechanism() == mechanism`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *mechanism*
| The test allocator used as the allocation mechanism.
|===


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