[#std-hash-0c6-folly_is_avalanching]
= xref:std.adoc[std]::xref:std/hash-0c6.adoc[hash<std::tuple<Ts...>>]::folly_is_avalanching
:relfileprefix: ../../
:mrdocs:

Marks this hash as avalanching when its element hashes are.

== Synopsis

Declared in `<folly/hash/Hash.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
using folly_is_avalanching = std::bool_constant<(sizeof...(Ts) != 1 || folly::IsAvalanchingHasher<std::hash<FirstT>, FirstT>::value)>;
----


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