[#bsl-pair-0b-2constructor-0db]
= xref:bsl.adoc[bsl]::xref:bsl/pair-0b.adoc[pair]::pair
:relfileprefix: ../../
:mrdocs:

Construct a `pair` with the `first` member initialized to the specified `a` value and the `second` member initialized to the specified `b` value.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class PARAM_1,
    class PARAM_2,
    class = void>
requires std::is_constructible<T1, PARAM_1>::value &&
                std::is_constructible<T2, PARAM_2>::value &&
                !(bsl::is_pointer<bsl::remove_reference_t<PARAM_2>>::value &&
                  bsl::is_convertible<PARAM_2,
                                      BloombergLP::bslma::Allocator *>::value)
constexpr
pair(
    PARAM_1&& a,
    PARAM_2&& b);
----


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