dependentDestructuredVariables.js

//// [dependentDestructuredVariables.ts]
type Action =
    | { kind: 'A', payload: number }
    | { kind: 'B', payload: string };

function f10({ kind, payload }: Action) {
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}

function f11(action: Action) {
    const { kind, payload } = action;
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}

function f12({ kind, payload }: Action) {
    switch (kind) {
        case 'A':
            payload.toFixed();
            break;
        case 'B':
            payload.toUpperCase();
            break;
        default:
            payload;  // never
    }
}

// repro #50206
function f13<T extends Action>({ kind, payload }: T) {
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}

function f14<T extends Action>(t: T) {
    const { kind, payload } = t;
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}

type Action2 =
    | { kind: 'A', payload: number | undefined }
    | { kind: 'B', payload: string | undefined };

function f20({ kind, payload }: Action2) {
    if (payload) {
        if (kind === 'A') {
            payload.toFixed();
        }
        if (kind === 'B') {
            payload.toUpperCase();
        }
    }
}

function f21(action: Action2) {
    const { kind, payload } = action;
    if (payload) {
        if (kind === 'A') {
            payload.toFixed();
        }
        if (kind === 'B') {
            payload.toUpperCase();
        }
    }
}

function f22(action: Action2) {
    if (action.payload) {
        const { kind, payload } = action;
        if (kind === 'A') {
            payload.toFixed();
        }
        if (kind === 'B') {
            payload.toUpperCase();
        }
    }
}

function f23({ kind, payload }: Action2) {
    if (payload) {
        switch (kind) {
            case 'A':
                payload.toFixed();
                break;
            case 'B':
                payload.toUpperCase();
                break;
            default:
                payload;  // never
        }
    }
}

type Foo =
    | { kind: 'A', isA: true }
    | { kind: 'B', isA: false }
    | { kind: 'C', isA: false };

function f30({ kind, isA }: Foo) {
    if (kind === 'A') {
        isA;   // true
    }
    if (kind === 'B') {
        isA;   // false
    }
    if (kind === 'C') {
        isA;   // false
    }
    if (isA) {
        kind;  // 'A'
    }
    else {
        kind;  // 'B' | 'C'
    }
}

type Args = ['A', number] | ['B', string]

function f40(...[kind, data]: Args) {
    if (kind === 'A') {
        data.toFixed();
    }
    if (kind === 'B') {
        data.toUpperCase();
    }
}

// Repro from #35283

interface A<T> { variant: 'a', value: T }

interface B<T> { variant: 'b', value: Array<T> }

type AB<T> = A<T> | B<T>;

declare function printValue<T>(t: T): void;

declare function printValueList<T>(t: Array<T>): void;

function unrefined1<T>(ab: AB<T>): void {
    const { variant, value } = ab;
    if (variant === 'a') {
        printValue<T>(value);
    }
    else {
        printValueList<T>(value);
    }
}

// Repro from #38020

type Action3 =
    | {type: 'add', payload: { toAdd: number } }
    | {type: 'remove', payload: { toRemove: number } };

const reducerBroken = (state: number, { type, payload }: Action3) => {
    switch (type) {
        case 'add':
            return state + payload.toAdd;
        case 'remove':
            return state - payload.toRemove;
    }
}

// Repro from #46143

declare var it: Iterator<number>;
const { value, done } = it.next();
if (!done) {
    value;  // number
}

// Repro from #46658

declare function f50(cb: (...args: Args) => void): void

f50((kind, data) => {
    if (kind === 'A') {
        data.toFixed();
    }
    if (kind === 'B') {
        data.toUpperCase();
    }
});

const f51: (...args: ['A', number] | ['B', string]) => void = (kind, payload) => {
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
};

const f52: (...args: ['A', number] | ['B']) => void = (kind, payload?) => {
    if (kind === 'A') {
        payload.toFixed();
    }
    else {
        payload;  // undefined
    }
};

declare function readFile(path: string, callback: (...args: [err: null, data: unknown[]] | [err: Error, data: undefined]) => void): void;

readFile('hello', (err, data) => {
    if (err === null) {
        data.length;
    }
    else {
        err.message;
    }
});

type ReducerArgs = ["add", { a: number, b: number }] | ["concat", { firstArr: any[], secondArr: any[] }];

const reducer: (...args: ReducerArgs) => void = (op, args) => {
    switch (op) {
        case "add":
            console.log(args.a + args.b);
            break;
        case "concat":
            console.log(args.firstArr.concat(args.secondArr));
            break;
    }
}

reducer("add", { a: 1, b: 3 });
reducer("concat", { firstArr: [1, 2], secondArr: [3, 4] });

// repro from https://github.com/microsoft/TypeScript/pull/47190#issuecomment-1057603588

type FooMethod = {
  method(...args:
    [type: "str", cb: (e: string) => void] |
    [type: "num", cb: (e: number) => void]
  ): void;
}

let fooM: FooMethod = {
  method(type, cb) {
    if (type == 'num') {
      cb(123)
    } else {
      cb("abc")
    }
  }
};

type FooAsyncMethod = {
  method(...args:
    [type: "str", cb: (e: string) => void] |
    [type: "num", cb: (e: number) => void]
  ): Promise<any>;
}

let fooAsyncM: FooAsyncMethod = {
  async method(type, cb) {
    if (type == 'num') {
      cb(123)
    } else {
      cb("abc")
    }
  }
};

type FooGenMethod = {
  method(...args:
    [type: "str", cb: (e: string) => void] |
    [type: "num", cb: (e: number) => void]
  ): Generator<any, any, any>;
}

let fooGenM: FooGenMethod = {
  *method(type, cb) {
    if (type == 'num') {
      cb(123)
    } else {
      cb("abc")
    }
  }
};

type FooAsyncGenMethod = {
  method(...args:
    [type: "str", cb: (e: string) => void] |
    [type: "num", cb: (e: number) => void]
  ): AsyncGenerator<any, any, any>;
}

let fooAsyncGenM: FooAsyncGenMethod = {
  async *method(type, cb) {
    if (type == 'num') {
      cb(123)
    } else {
      cb("abc")
    }
  }
};

// Repro from #48345

type Func = <T extends ["a", number] | ["b", string]>(...args: T) => void;

const f60: Func = (kind, payload) => {
    if (kind === "a") {
        payload.toFixed();  // error
    }
    if (kind === "b") {
        payload.toUpperCase();  // error
    }
};

// Repro from #48902

function foo({
    value1,
    test1 = value1.test1,
    test2 = value1.test2,
    test3 = value1.test3,
    test4 = value1.test4,
    test5 = value1.test5,
    test6 = value1.test6,
    test7 = value1.test7,
    test8 = value1.test8,
    test9 = value1.test9
}) {}

// Repro from #49772

function fa1(x: [true, number] | [false, string]) {
    const [guard, value] = x;
    if (guard) {
        for (;;) {
            value;  // number
        }
    }
    else {
        while (!!true) {
            value;  // string
        }
    }
}

function fa2(x: { guard: true, value: number } | { guard: false, value: string }) {
    const { guard, value } = x;
    if (guard) {
        for (;;) {
            value;  // number
        }
    }
    else {
        while (!!true) {
            value;  // string
        }
    }
}

const fa3: (...args: [true, number] | [false, string]) => void = (guard, value) => {
    if (guard) {
        for (;;) {
            value;  // number
        }
    }
    else {
        while (!!true) {
            value;  // string
        }
    }
}


//// [dependentDestructuredVariables.js]
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
    if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
    var g = generator.apply(thisArg, _arguments || []), i, q = [];
    return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
    function fulfill(value) { resume("next", value); }
    function reject(value) { resume("throw", value); }
    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
};
function f10({ kind, payload }) {
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}
function f11(action) {
    const { kind, payload } = action;
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}
function f12({ kind, payload }) {
    switch (kind) {
        case 'A':
            payload.toFixed();
            break;
        case 'B':
            payload.toUpperCase();
            break;
        default:
            payload; // never
    }
}
// repro #50206
function f13({ kind, payload }) {
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}
function f14(t) {
    const { kind, payload } = t;
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
}
function f20({ kind, payload }) {
    if (payload) {
        if (kind === 'A') {
            payload.toFixed();
        }
        if (kind === 'B') {
            payload.toUpperCase();
        }
    }
}
function f21(action) {
    const { kind, payload } = action;
    if (payload) {
        if (kind === 'A') {
            payload.toFixed();
        }
        if (kind === 'B') {
            payload.toUpperCase();
        }
    }
}
function f22(action) {
    if (action.payload) {
        const { kind, payload } = action;
        if (kind === 'A') {
            payload.toFixed();
        }
        if (kind === 'B') {
            payload.toUpperCase();
        }
    }
}
function f23({ kind, payload }) {
    if (payload) {
        switch (kind) {
            case 'A':
                payload.toFixed();
                break;
            case 'B':
                payload.toUpperCase();
                break;
            default:
                payload; // never
        }
    }
}
function f30({ kind, isA }) {
    if (kind === 'A') {
        isA; // true
    }
    if (kind === 'B') {
        isA; // false
    }
    if (kind === 'C') {
        isA; // false
    }
    if (isA) {
        kind; // 'A'
    }
    else {
        kind; // 'B' | 'C'
    }
}
function f40(...[kind, data]) {
    if (kind === 'A') {
        data.toFixed();
    }
    if (kind === 'B') {
        data.toUpperCase();
    }
}
function unrefined1(ab) {
    const { variant, value } = ab;
    if (variant === 'a') {
        printValue(value);
    }
    else {
        printValueList(value);
    }
}
const reducerBroken = (state, { type, payload }) => {
    switch (type) {
        case 'add':
            return state + payload.toAdd;
        case 'remove':
            return state - payload.toRemove;
    }
};
const { value, done } = it.next();
if (!done) {
    value; // number
}
f50((kind, data) => {
    if (kind === 'A') {
        data.toFixed();
    }
    if (kind === 'B') {
        data.toUpperCase();
    }
});
const f51 = (kind, payload) => {
    if (kind === 'A') {
        payload.toFixed();
    }
    if (kind === 'B') {
        payload.toUpperCase();
    }
};
const f52 = (kind, payload) => {
    if (kind === 'A') {
        payload.toFixed();
    }
    else {
        payload; // undefined
    }
};
readFile('hello', (err, data) => {
    if (err === null) {
        data.length;
    }
    else {
        err.message;
    }
});
const reducer = (op, args) => {
    switch (op) {
        case "add":
            console.log(args.a + args.b);
            break;
        case "concat":
            console.log(args.firstArr.concat(args.secondArr));
            break;
    }
};
reducer("add", { a: 1, b: 3 });
reducer("concat", { firstArr: [1, 2], secondArr: [3, 4] });
let fooM = {
    method(type, cb) {
        if (type == 'num') {
            cb(123);
        }
        else {
            cb("abc");
        }
    }
};
let fooAsyncM = {
    method(type, cb) {
        return __awaiter(this, void 0, void 0, function* () {
            if (type == 'num') {
                cb(123);
            }
            else {
                cb("abc");
            }
        });
    }
};
let fooGenM = {
    *method(type, cb) {
        if (type == 'num') {
            cb(123);
        }
        else {
            cb("abc");
        }
    }
};
let fooAsyncGenM = {
    method(type, cb) {
        return __asyncGenerator(this, arguments, function* method_1() {
            if (type == 'num') {
                cb(123);
            }
            else {
                cb("abc");
            }
        });
    }
};
const f60 = (kind, payload) => {
    if (kind === "a") {
        payload.toFixed(); // error
    }
    if (kind === "b") {
        payload.toUpperCase(); // error
    }
};
// Repro from #48902
function foo({ value1, test1 = value1.test1, test2 = value1.test2, test3 = value1.test3, test4 = value1.test4, test5 = value1.test5, test6 = value1.test6, test7 = value1.test7, test8 = value1.test8, test9 = value1.test9 }) { }
// Repro from #49772
function fa1(x) {
    const [guard, value] = x;
    if (guard) {
        for (;;) {
            value; // number
        }
    }
    else {
        while (!!true) {
            value; // string
        }
    }
}
function fa2(x) {
    const { guard, value } = x;
    if (guard) {
        for (;;) {
            value; // number
        }
    }
    else {
        while (!!true) {
            value; // string
        }
    }
}
const fa3 = (guard, value) => {
    if (guard) {
        for (;;) {
            value; // number
        }
    }
    else {
        while (!!true) {
            value; // string
        }
    }
};


//// [dependentDestructuredVariables.d.ts]
declare type Action = {
    kind: 'A';
    payload: number;
} | {
    kind: 'B';
    payload: string;
};
declare function f10({ kind, payload }: Action): void;
declare function f11(action: Action): void;
declare function f12({ kind, payload }: Action): void;
declare function f13<T extends Action>({ kind, payload }: T): void;
declare function f14<T extends Action>(t: T): void;
declare type Action2 = {
    kind: 'A';
    payload: number | undefined;
} | {
    kind: 'B';
    payload: string | undefined;
};
declare function f20({ kind, payload }: Action2): void;
declare function f21(action: Action2): void;
declare function f22(action: Action2): void;
declare function f23({ kind, payload }: Action2): void;
declare type Foo = {
    kind: 'A';
    isA: true;
} | {
    kind: 'B';
    isA: false;
} | {
    kind: 'C';
    isA: false;
};
declare function f30({ kind, isA }: Foo): void;
declare type Args = ['A', number] | ['B', string];
declare function f40(...[kind, data]: Args): void;
interface A<T> {
    variant: 'a';
    value: T;
}
interface B<T> {
    variant: 'b';
    value: Array<T>;
}
declare type AB<T> = A<T> | B<T>;
declare function printValue<T>(t: T): void;
declare function printValueList<T>(t: Array<T>): void;
declare function unrefined1<T>(ab: AB<T>): void;
declare type Action3 = {
    type: 'add';
    payload: {
        toAdd: number;
    };
} | {
    type: 'remove';
    payload: {
        toRemove: number;
    };
};
declare const reducerBroken: (state: number, { type, payload }: Action3) => number;
declare var it: Iterator<number>;
declare const value: any, done: boolean | undefined;
declare function f50(cb: (...args: Args) => void): void;
declare const f51: (...args: ['A', number] | ['B', string]) => void;
declare const f52: (...args: ['A', number] | ['B']) => void;
declare function readFile(path: string, callback: (...args: [err: null, data: unknown[]] | [err: Error, data: undefined]) => void): void;
declare type ReducerArgs = ["add", {
    a: number;
    b: number;
}] | ["concat", {
    firstArr: any[];
    secondArr: any[];
}];
declare const reducer: (...args: ReducerArgs) => void;
declare type FooMethod = {
    method(...args: [
        type: "str",
        cb: (e: string) => void
    ] | [
        type: "num",
        cb: (e: number) => void
    ]): void;
};
declare let fooM: FooMethod;
declare type FooAsyncMethod = {
    method(...args: [
        type: "str",
        cb: (e: string) => void
    ] | [
        type: "num",
        cb: (e: number) => void
    ]): Promise<any>;
};
declare let fooAsyncM: FooAsyncMethod;
declare type FooGenMethod = {
    method(...args: [
        type: "str",
        cb: (e: string) => void
    ] | [
        type: "num",
        cb: (e: number) => void
    ]): Generator<any, any, any>;
};
declare let fooGenM: FooGenMethod;
declare type FooAsyncGenMethod = {
    method(...args: [
        type: "str",
        cb: (e: string) => void
    ] | [
        type: "num",
        cb: (e: number) => void
    ]): AsyncGenerator<any, any, any>;
};
declare let fooAsyncGenM: FooAsyncGenMethod;
declare type Func = <T extends ["a", number] | ["b", string]>(...args: T) => void;
declare const f60: Func;
declare function foo({ value1, test1, test2, test3, test4, test5, test6, test7, test8, test9 }: {
    value1: any;
    test1?: any;
    test2?: any;
    test3?: any;
    test4?: any;
    test5?: any;
    test6?: any;
    test7?: any;
    test8?: any;
    test9?: any;
}): void;
declare function fa1(x: [true, number] | [false, string]): void;
declare function fa2(x: {
    guard: true;
    value: number;
} | {
    guard: false;
    value: string;
}): void;
declare const fa3: (...args: [true, number] | [false, string]) => void;