[#bsl-variant-operator_assign-03]
= xref:bsl.adoc[bsl]::xref:bsl/variant.adoc[variant]::operator=
:relfileprefix: ../../
:mrdocs:

If `rhs` holds the same alternative type as this object, copy assign the contained value of `rhs` to the contained value of this object. Otherwise, destroy the contained value of this object (if any) and, if `rhs` holds a value, copy‐construct the corresponding alternative of this object from the contained value of `rhs`. The allocators of this object and `rhs` both remain unchanged. This operator is deleted unless all alternatives are copy constructible and copy assignable. If the construction of a new alternative object exits via an exception, this `variant` object is left in a valueless by exception state. This is different from the standard, which requires a temporary copy of `rhs` to be made if copy construction of the active alternative is not `noexcept` (see [variant.assign]for details). The standard behavior causes unnecessary performance degradation in cases where the alternative constructor does not throw, yet is not marked `noexcept`; this behavior is therefore not implemented in `bsl::variant`. For simplicity of implementation, this method also differs from the standard in the following ways: * conditional triviality is not implemented * `constexpr` is not implemented * `noexcept` specification is not implemented

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/variant.adoc[variant]&
operator=(xref:bsl/variant.adoc[variant] const& rhs) = default;
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#