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// Copyright (c) 2020 Jozty. All rights reserved. MIT license.
import curryN from './utils/curry_n.ts';import type { InferType, PH } from './utils/types.ts';import { isArray, isString } from './utils/is.ts';
// @typestype Concat_2<L extends unknown[] | string> = (b: L) => InferType<L>;
type Concat_1<L extends unknown[] | string> = (a: L) => InferType<L>;
type Concat =  & (<L extends unknown[] | string>(a: L) => Concat_2<InferType<L>>)  & (<L extends unknown[] | string>(a: PH, b: L) => Concat_1<InferType<L>>)  & (<L extends unknown[] | string>(a: L, b: L) => InferType<L>);
function _concat<L extends unknown[] | string, T>(a: L, b: L): L {  if (isArray<T>(a) && isArray<T>(b)) return a.concat(b) as L;  if (isString(a) && isString(b)) return (a + b) as L;  throw new TypeError(    'Types are not compatible. Both the arguments passed must be of same type.',  );}
/** * Concat two arrays or strings. * Both the arguments passed must be of same type. */export const concat: Concat = curryN(2, _concat);