[#bsl-pair-0b-operator_assign-02]
= xref:bsl.adoc[bsl]::xref:bsl/pair-0b.adoc[pair]::operator=
:relfileprefix: ../../
:mrdocs:

Assign to this `pair` from the specified `rhs` pair, where the type `rhs` is the pair type native to the compiler's library, holding the parameterized types `PARAM_1` and `PARAM_2`, and return a reference offering modifiable access to this object. Assign `first` the value in `rhs.first` and `second` the value in `rhs.second`. Attempted use of this assignment operator will not compile unless both `T1` and `T2` supply assignment operators, and `T1` is assignable from `PARAM_1` and `T2` is assignable from `PARAM_2`.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class PARAM_1,
    class PARAM_2>
constexpr
xref:bsl/pair-0b.adoc[pair<T1, T2>]&
operator=(std::pair<PARAM_1, PARAM_2> const& rhs);
----


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