[#BloombergLP-bslma-AllocatorUtil-swap-075be4]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::xref:BloombergLP/bslma/AllocatorUtil.adoc[AllocatorUtil]::swap
:relfileprefix: ../../../
:mrdocs:

Conditionally swap the values at `pa` and `pb` when `allowed` is `true_type`.

== Synopsis

Declared in `<bslma_allocatorutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_TYPE>
static
void
swap(
    t_TYPE* pa,
    t_TYPE* pb,
    xref:bsl/true_type.adoc[bsl::true_type] allowed);
----

== Description

Same as the preceding overload, when `allowed` is `true_type`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pa*
| address of the first object to swap
| *pb*
| address of the second object to swap
| *allowed*
| `true_type` tag indicating swapping is permitted
|===


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