import { noop } from './noop'; import { UnaryFunction } from '../interfaces'; /* tslint:disable:max-line-length */ export function pipe<T>(): UnaryFunction<T, T>; export function pipe<T, A>(op1: UnaryFunction<T, A>): UnaryFunction<T, A>; export function pipe<T, A, B>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>): UnaryFunction<T, B>; export function pipe<T, A, B, C>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>): UnaryFunction<T, C>; export function pipe<T, A, B, C, D>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>, op4: UnaryFunction<C, D>): UnaryFunction<T, D>; export function pipe<T, A, B, C, D, E>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>, op4: UnaryFunction<C, D>, op5: UnaryFunction<D, E>): UnaryFunction<T, E>; export function pipe<T, A, B, C, D, E, F>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>, op4: UnaryFunction<C, D>, op5: UnaryFunction<D, E>, op6: UnaryFunction<E, F>): UnaryFunction<T, F>; export function pipe<T, A, B, C, D, E, F, G>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>, op4: UnaryFunction<C, D>, op5: UnaryFunction<D, E>, op6: UnaryFunction<E, F>, op7: UnaryFunction<F, G>): UnaryFunction<T, G>; export function pipe<T, A, B, C, D, E, F, G, H>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>, op4: UnaryFunction<C, D>, op5: UnaryFunction<D, E>, op6: UnaryFunction<E, F>, op7: UnaryFunction<F, G>, op8: UnaryFunction<G, H>): UnaryFunction<T, H>; export function pipe<T, A, B, C, D, E, F, G, H, I>(op1: UnaryFunction<T, A>, op2: UnaryFunction<A, B>, op3: UnaryFunction<B, C>, op4: UnaryFunction<C, D>, op5: UnaryFunction<D, E>, op6: UnaryFunction<E, F>, op7: UnaryFunction<F, G>, op8: UnaryFunction<G, H>, op9: UnaryFunction<H, I>): UnaryFunction<T, I>; /* tslint:enable:max-line-length */ export function pipe<T, R>(...fns: Array<UnaryFunction<T, R>>): UnaryFunction<T, R> { return pipeFromArray(fns); } /* @internal */ export function pipeFromArray<T, R>(fns: Array<UnaryFunction<T, R>>): UnaryFunction<T, R> { if (!fns) { return noop as UnaryFunction<any, any>; } if (fns.length === 1) { return fns[0]; } return function piped(input: T): R { return fns.reduce((prev: any, fn: UnaryFunction<T, R>) => fn(prev), input); }; }