You are currently looking at the < v8.2.0 docs (Reason v3.6 syntax edition). You can find the latest API docs here.
(These docs cover all versions between v3 to v8 and are equivalent to the old BuckleScript docs before the rebrand)
This module is
Belt.HashSet specialized with key type to be a primitive type.
It is more efficient in general, the API is the same with
Belt.HashSet except its key type is fixed, and identity is not needed(using the built-in one).
type key = string;
let make: (~hintSize: int) => t;
let clear: t => unit;
let isEmpty: t => bool;
let add: (t, key) => unit;
let copy: t => t;
let has: (t, key) => bool;
let remove: (t, key) => unit;
let forEachU: (t, [@bs] (key => unit)) => unit;
let forEach: (t, key => unit) => unit;
let reduceU: (t, 'c, [@bs] (('c, key) => 'c)) => 'c;
let reduce: (t, 'c, ('c, key) => 'c) => 'c;
let size: t => int;
let logStats: t => unit;
let toArray: t => array(key);
let fromArray: array(key) => t;
let mergeMany: (t, array(key)) => unit;
let getBucketHistogram: t => array(int);