//// [genericRestParameters1.ts]
declare let f1: (...x: [number, string, boolean]) => void;
declare let f2: (x0: number, x1: string, x2: boolean) => void;

f1 = f2;
f2 = f1;

declare const t3: [number, string, boolean];
declare const t2: [string, boolean];
declare const t1: [boolean];
declare const t0: [];

declare const ns: [number, string];
declare const sn: [string, number];

f1(42, "hello", true);
f1(t3[0], t3[1], t3[2]);
f1(...t3);
f1(42, ...t2);
f1(42, "hello", ...t1);
f1(42, "hello", true, ...t0);
f1(ns[0], ns[1], true);
f1(...ns, true);  // FIXME: Error, since ...ns is considered as string|number here

f2(42, "hello", true);
f2(t3[0], t3[1], t3[2]);
f2(...t3);
f2(42, ...t2);
f2(42, "hello", ...t1);
f2(42, "hello", true, ...t0);
f2(ns[0], ns[1], true);
f2(...ns, true);  // FIXME: Error, since ...ns is considered as string|number here

declare function f10<T extends unknown[]>(...args: T): T;

const x10 = f10(42, "hello", true);  // [number, string, boolean]
const x11 = f10(42, "hello");  // [number, string]
const x12 = f10(42);  // [number]
const x13 = f10();  // []
const x14 = f10(...t3);  // [number, string, boolean]
const x15 = f10(42, ...t2);  // [number, string, boolean]
const x16 = f10(42, "hello", ...t1);  // [number, string, boolean]
const x17 = f10(42, "hello", true, ...t0);  // [number, string, boolean]
const x18 = f10(...ns, true);  // (string | number | boolean)[]

function g10<U extends string[], V extends [number, number]>(u: U, v: V) {
    let x1 = f10(...u);  // U
    let x2 = f10(...v);  // V
    let x3 = f10(1, ...u);  // [number, ...string[]]
    let x4 = f10(...u, ...v);  // (string | number)[]
}

declare function f11<T extends (string | number | boolean)[]>(...args: T): T;

const z10 = f11(42, "hello", true);  // [42, "hello", true]
const z11 = f11(42, "hello");  // [42, "hello"]
const z12 = f11(42);  // [42]
const z13 = f11();  // []
const z14 = f11(...t3);  // [number, string, boolean]
const z15 = f11(42, ...t2);  // [42, string, boolean]
const z16 = f11(42, "hello", ...t1);  // [42, "hello", boolean]
const z17 = f11(42, "hello", true, ...t0);  // [42, "hello", true]
const z18 = f11(...ns, true);  // (string | number | true)[]

function g11<U extends string[], V extends [number, number]>(u: U, v: V) {
    let x1 = f11(...u);  // U
    let x2 = f11(...v);  // V
    let x3 = f11(1, ...u);  // [1, ...string[]]
    let x4 = f11(...u, ...v);  // (string | number)[]
}

function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T) {
    return f(...args);
}

function callr<T extends unknown[], U>(args: T, f: (...args: T) => U) {
    return f(...args);
}

declare function f15(a: string, b: number): string | number;
declare function f16<A, B>(a: A, b: B): A | B;

let x20 = call((x, y) => x + y, 10, 20);  // number
let x21 = call((x, y) => x + y, 10, "hello");  // string
let x22 = call(f15, "hello", 42);  // string | number
let x23 = call(f16, "hello", 42);  // unknown
let x24 = call<[string, number], string | number>(f16, "hello", 42);  // string | number

let x30 = callr(sn, (x, y) => x + y);  // string
let x31 = callr(sn, f15);  // string | number
let x32 = callr(sn, f16);  // string | number

function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T) {
    return (...rest: U) => f(x, ...rest);
}

declare const f20: (x: number, y: string, z: boolean) => string[];

const f21 = bind(f20, 42);  // (y: string, z: boolean) => string[]
const f22 = bind(f21, "hello");  // (z: boolean) => string[]
const f23 = bind(f22, true);  // () => string[]

f20(42, "hello", true);
f21("hello", true);
f22(true);
f23();

declare const g20: (x: number, y?: string, z?: boolean) => string[];

const g21 = bind(g20, 42);  // (y: string, z: boolean) => string[]
const g22 = bind(g21, "hello");  // (z: boolean) => string[]
const g23 = bind(g22, true);  // () => string[]

g20(42, "hello", true);
g20(42, "hello");
g20(42);
g21("hello", true);
g21("hello");
g21();
g22(true);
g22();
g23();

declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;

const c30 = f30(42, x => "" + x, x => x + 1);  // [(x: number) => string, (x: number) => number]

type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
type T02 = Parameters<(...args: [number, string, boolean]) => void>;
type T03 = ConstructorParameters<new (x: number, y: string, z: boolean) => void>;
type T04 = ConstructorParameters<new (...args: [number, string, boolean]) => void>;
type T05<T> = Parameters<(...args: T[]) => void>;
type T06<T> = ConstructorParameters<new (...args: []) => void>;
type T07<T extends any[]> = Parameters<(...args: T) => void>;
type T08<T extends any[]> = ConstructorParameters<new (...args: T) => void>;
type T09 = Parameters<Function>;

type Record1 = {
  move: [number, 'left' | 'right'];
  jump: [number, 'up' | 'down'];
  stop: string;
  done: [];
}

type EventType<T> = {
  emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void; 
}

declare var events: EventType<Record1>;
events.emit('move', 10, 'left');
events.emit('jump', 20, 'up');
events.emit('stop', 'Bye!');
events.emit('done');

// Repro from #25871

declare var ff1: (... args: any[]) => void;

declare var ff2: () => void;
declare var ff3: (...args: []) => void;
declare var ff4: (a: never) => void;

ff1 = ff2;
ff1 = ff3;
ff1 = ff4;  // Error


//// [genericRestParameters1.js]
"use strict";
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
        if (ar || !(i in from)) {
            if (!ar) ar = Array.prototype.slice.call(from, 0, i);
            ar[i] = from[i];
        }
    }
    return to.concat(ar || Array.prototype.slice.call(from));
};
f1 = f2;
f2 = f1;
f1(42, "hello", true);
f1(t3[0], t3[1], t3[2]);
f1.apply(void 0, t3);
f1.apply(void 0, __spreadArray([42], t2, false));
f1.apply(void 0, __spreadArray([42, "hello"], t1, false));
f1.apply(void 0, __spreadArray([42, "hello", true], t0, false));
f1(ns[0], ns[1], true);
f1.apply(void 0, __spreadArray(__spreadArray([], ns, false), [true], false)); // FIXME: Error, since ...ns is considered as string|number here
f2(42, "hello", true);
f2(t3[0], t3[1], t3[2]);
f2.apply(void 0, t3);
f2.apply(void 0, __spreadArray([42], t2, false));
f2.apply(void 0, __spreadArray([42, "hello"], t1, false));
f2.apply(void 0, __spreadArray([42, "hello", true], t0, false));
f2(ns[0], ns[1], true);
f2.apply(void 0, __spreadArray(__spreadArray([], ns, false), [true], false)); // FIXME: Error, since ...ns is considered as string|number here
var x10 = f10(42, "hello", true); // [number, string, boolean]
var x11 = f10(42, "hello"); // [number, string]
var x12 = f10(42); // [number]
var x13 = f10(); // []
var x14 = f10.apply(void 0, t3); // [number, string, boolean]
var x15 = f10.apply(void 0, __spreadArray([42], t2, false)); // [number, string, boolean]
var x16 = f10.apply(void 0, __spreadArray([42, "hello"], t1, false)); // [number, string, boolean]
var x17 = f10.apply(void 0, __spreadArray([42, "hello", true], t0, false)); // [number, string, boolean]
var x18 = f10.apply(void 0, __spreadArray(__spreadArray([], ns, false), [true], false)); // (string | number | boolean)[]
function g10(u, v) {
    var x1 = f10.apply(void 0, u); // U
    var x2 = f10.apply(void 0, v); // V
    var x3 = f10.apply(void 0, __spreadArray([1], u, false)); // [number, ...string[]]
    var x4 = f10.apply(void 0, __spreadArray(__spreadArray([], u, false), v, false)); // (string | number)[]
}
var z10 = f11(42, "hello", true); // [42, "hello", true]
var z11 = f11(42, "hello"); // [42, "hello"]
var z12 = f11(42); // [42]
var z13 = f11(); // []
var z14 = f11.apply(void 0, t3); // [number, string, boolean]
var z15 = f11.apply(void 0, __spreadArray([42], t2, false)); // [42, string, boolean]
var z16 = f11.apply(void 0, __spreadArray([42, "hello"], t1, false)); // [42, "hello", boolean]
var z17 = f11.apply(void 0, __spreadArray([42, "hello", true], t0, false)); // [42, "hello", true]
var z18 = f11.apply(void 0, __spreadArray(__spreadArray([], ns, false), [true], false)); // (string | number | true)[]
function g11(u, v) {
    var x1 = f11.apply(void 0, u); // U
    var x2 = f11.apply(void 0, v); // V
    var x3 = f11.apply(void 0, __spreadArray([1], u, false)); // [1, ...string[]]
    var x4 = f11.apply(void 0, __spreadArray(__spreadArray([], u, false), v, false)); // (string | number)[]
}
function call(f) {
    var args = [];
    for (var _i = 1; _i < arguments.length; _i++) {
        args[_i - 1] = arguments[_i];
    }
    return f.apply(void 0, args);
}
function callr(args, f) {
    return f.apply(void 0, args);
}
var x20 = call(function (x, y) { return x + y; }, 10, 20); // number
var x21 = call(function (x, y) { return x + y; }, 10, "hello"); // string
var x22 = call(f15, "hello", 42); // string | number
var x23 = call(f16, "hello", 42); // unknown
var x24 = call(f16, "hello", 42); // string | number
var x30 = callr(sn, function (x, y) { return x + y; }); // string
var x31 = callr(sn, f15); // string | number
var x32 = callr(sn, f16); // string | number
function bind(f, x) {
    return function () {
        var rest = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            rest[_i] = arguments[_i];
        }
        return f.apply(void 0, __spreadArray([x], rest, false));
    };
}
var f21 = bind(f20, 42); // (y: string, z: boolean) => string[]
var f22 = bind(f21, "hello"); // (z: boolean) => string[]
var f23 = bind(f22, true); // () => string[]
f20(42, "hello", true);
f21("hello", true);
f22(true);
f23();
var g21 = bind(g20, 42); // (y: string, z: boolean) => string[]
var g22 = bind(g21, "hello"); // (z: boolean) => string[]
var g23 = bind(g22, true); // () => string[]
g20(42, "hello", true);
g20(42, "hello");
g20(42);
g21("hello", true);
g21("hello");
g21();
g22(true);
g22();
g23();
var c30 = f30(42, function (x) { return "" + x; }, function (x) { return x + 1; }); // [(x: number) => string, (x: number) => number]
events.emit('move', 10, 'left');
events.emit('jump', 20, 'up');
events.emit('stop', 'Bye!');
events.emit('done');
ff1 = ff2;
ff1 = ff3;
ff1 = ff4; // Error


//// [genericRestParameters1.d.ts]
declare let f1: (...x: [number, string, boolean]) => void;
declare let f2: (x0: number, x1: string, x2: boolean) => void;
declare const t3: [number, string, boolean];
declare const t2: [string, boolean];
declare const t1: [boolean];
declare const t0: [];
declare const ns: [number, string];
declare const sn: [string, number];
declare function f10<T extends unknown[]>(...args: T): T;
declare const x10: [number, string, boolean];
declare const x11: [number, string];
declare const x12: [number];
declare const x13: [];
declare const x14: [number, string, boolean];
declare const x15: [number, string, boolean];
declare const x16: [number, string, boolean];
declare const x17: [number, string, boolean];
declare const x18: [number, string, boolean];
declare function g10<U extends string[], V extends [number, number]>(u: U, v: V): void;
declare function f11<T extends (string | number | boolean)[]>(...args: T): T;
declare const z10: [42, "hello", true];
declare const z11: [42, "hello"];
declare const z12: [42];
declare const z13: [];
declare const z14: [number, string, boolean];
declare const z15: [42, string, boolean];
declare const z16: [42, "hello", boolean];
declare const z17: [42, "hello", true];
declare const z18: [number, string, true];
declare function g11<U extends string[], V extends [number, number]>(u: U, v: V): void;
declare function call<T extends unknown[], U>(f: (...args: T) => U, ...args: T): U;
declare function callr<T extends unknown[], U>(args: T, f: (...args: T) => U): U;
declare function f15(a: string, b: number): string | number;
declare function f16<A, B>(a: A, b: B): A | B;
declare let x20: number;
declare let x21: string;
declare let x22: string | number;
declare let x23: string | number;
declare let x24: string | number;
declare let x30: string;
declare let x31: string | number;
declare let x32: string | number;
declare function bind<T, U extends unknown[], V>(f: (x: T, ...rest: U) => V, x: T): (...rest: U) => V;
declare const f20: (x: number, y: string, z: boolean) => string[];
declare const f21: (y: string, z: boolean) => string[];
declare const f22: (z: boolean) => string[];
declare const f23: () => string[];
declare const g20: (x: number, y?: string, z?: boolean) => string[];
declare const g21: (y?: string | undefined, z?: boolean | undefined) => string[];
declare const g22: (z?: boolean | undefined) => string[];
declare const g23: () => string[];
declare function f30<T, U extends ((x: T) => any)[]>(x: T, ...args: U): U;
declare const c30: [(x: number) => string, (x: number) => number];
type T01 = Parameters<(x: number, y: string, z: boolean) => void>;
type T02 = Parameters<(...args: [number, string, boolean]) => void>;
type T03 = ConstructorParameters<new (x: number, y: string, z: boolean) => void>;
type T04 = ConstructorParameters<new (...args: [number, string, boolean]) => void>;
type T05<T> = Parameters<(...args: T[]) => void>;
type T06<T> = ConstructorParameters<new (...args: []) => void>;
type T07<T extends any[]> = Parameters<(...args: T) => void>;
type T08<T extends any[]> = ConstructorParameters<new (...args: T) => void>;
type T09 = Parameters<Function>;
type Record1 = {
    move: [number, 'left' | 'right'];
    jump: [number, 'up' | 'down'];
    stop: string;
    done: [];
};
type EventType<T> = {
    emit<K extends keyof T = keyof T>(e: K, ...payload: T[K] extends any[] ? T[K] : [T[K]]): void;
};
declare var events: EventType<Record1>;
declare var ff1: (...args: any[]) => void;
declare var ff2: () => void;
declare var ff3: (...args: []) => void;
declare var ff4: (a: never) => void;
