[#bsl-pair-0b-first_type]
= xref:bsl.adoc[bsl]::xref:bsl/pair-0b.adoc[pair]::first_type
:relfileprefix: ../../
:mrdocs:

This `typedef` is an alias to the type of the `first` data member.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef T1 first_type;
----


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