# All files / internalHelpers _curry.js

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     // @flow

    // Type definitions taken from https://github.com/gcanti/flow-static-land/blob/master/src/Fun.js
    type Fn1<A, B> = (a: A, ...rest: Array<void>) => B;
    type Fn2<A, B, C> = (a: A, b: B, ...rest: Array<void>) => C;
    type Fn3<A, B, C, D> = (a: A, b: B, c: C, ...rest: Array<void>) => D;

    type CurriedFn2<A, B, C> =
      & Fn1<A, Fn1<B, C>>
      & Fn2<A, B, C>;
    // eslint-disable-next-line no-unused-vars
    type CurriedFn3<A, B, C, D> =
      & Fn1<A, CurriedFn2<B, C, D>>
      & Fn2<A, B, Fn1<C, D>>
      & Fn3<A, B, C, D>;

    // eslint-disable-next-line no-unused-vars
    declare function curry<A, B, C>(f: Fn2<A, B, C>): CurriedFn2<A, B, C>;
    // eslint-disable-next-line no-redeclare
    declare function curry<A, B, C, D>(f: Fn3<A, B, C, D>): CurriedFn3<A, B, C, D>;

    function curried(f, length, acc) {
      return function fn() {
        // eslint-disable-next-line prefer-rest-params
        const combined = acc.concat(Array.prototype.slice.call(arguments))
        return combined.length >= length ? f.apply(this, combined) : curried(f, length, combined)
      }
    }

    export default function curry(f: Function) { // eslint-disable-line no-redeclare
      return curried(f, f.length, [])
    }