[#bsl-pair-03]
= xref:bsl.adoc[bsl]::xref:bsl/pair-0b.adoc[pair<T1, T2>]
:relfileprefix: ../
:mrdocs:

Deduce the specified types `T1` and `T2` from the corresponding template parameters of the `bsl::pair` supplied to the constructor of `pair`. This guide does not participate in deduction unless the specified `ALLOC` inherits from `bslma::Allocator`.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class T1,
    class T2,
    class ALLOC>
requires bsl::is_convertible_v<ALLOC *, BloombergLP::bslma::Allocator *>
xref:bsl/pair-0b.adoc[pair<T1, T2>](
    xref:bsl/pair-0b.adoc[pair<T1, T2>],
    ALLOC*) -> xref:bsl/pair-0b.adoc[pair<T1, T2>];
----


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