[#bsl-swap-05ca]
= xref:bsl.adoc[bsl]::swap
:relfileprefix: ../
:mrdocs:

Exchange the values of the specified `a` and `b` objects.

== Synopsis

Declared in `<bslstl_vector.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
swap(
    xref:bsl/vector-086.adoc[vector]& a,
    xref:bsl/vector-086.adoc[vector]& b) noexcept(noexcept(a.d_impl.swap(b.d_impl)));
----

[NOTE]
====
This function is a https://en.cppreference.com/w/cpp/language/friend[hidden friend] of xref:bsl/vector-086.adoc[vector<VALUE_TYPE*, ALLOCATOR>], declared only inside that class: it can be found only through argument-dependent lookup.
====

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| first vector to swap
| *b*
| second vector to swap
|===


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