package stdune

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package stdune
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Id provides identifiers for types, and the ability to test (via Id.same) at runtime if two identifiers are equal, and if so to get a proof of equality of their types.

type 'a t
val create : unit -> 'a t
val hash : _ t -> int
val equal : _ t -> _ t -> bool
val same : 'a t -> 'b t -> ('a, 'b) t option