[#absl-ConvertVariantTo]
= xref:absl.adoc[absl]::ConvertVariantTo
:relfileprefix: ../
:mrdocs:

Converts a variant to a variant of another set of types.

== Synopsis

Declared in `<absl/types/variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename To,
    typename Variant>
To
ConvertVariantTo(Variant&& variant);
----

== Description

Each alternative of the target variant must be constructible from any type held by the source variant.

Example:

std::variant<name1, name2, float> InternalReq(const Req&);

// name1 and name2 are convertible to name std::variant<name, float> ExternalReq(const Req& req) { return absl::ConvertVariantTo<std::variant<name, float>>( InternalReq(req)); }

== Return Value

A `To` constructed from the active alternative of `variant`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *variant*
| The source variant to convert.
|===


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