[#BSLSTL_VARIANT_INDEX_OF]
= BSLSTL_VARIANT_INDEX_OF
:mrdocs:

This component‐private macro expands to the index of the first alternative in the specified `VARIANT` that is identical to the specified `TYPE`, or `bsl::variant_npos` if no such alternative exists.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
#define BSLSTL_VARIANT_INDEX_OF(TYPE, VARIANT)

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