=== tests/cases/conformance/expressions/typeGuards/typeGuardsInIfStatement.ts ===
// In the true branch statement of an �if� statement, 
// the type of a variable or parameter is narrowed by any type guard in the �if� condition when true, 
// provided the true branch statement contains no assignments to the variable or parameter.
// In the false branch statement of an �if� statement, 
// the type of a variable or parameter is narrowed by any type guard in the �if� condition when false, 
// provided the false branch statement contains no assignments to the variable or parameter
function foo(x: number | string) {
>foo : (x: string | number) => number
>x : string | number

    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        return x.length; // string
>x.length : number
>x : string
>length : number
    }
    else {
        return x++; // number
>x++ : number
>x : number
    }
}
function foo2(x: number | string) {
>foo2 : (x: string | number) => string | number
>x : string | number

    // x is assigned in the if true branch, the type is not narrowed
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        x = 10;
>x = 10 : number
>x : string | number

        return x; // string | number
>x : string | number
    }
    else {
        return x; // string | number
>x : string | number
    }
}
function foo3(x: number | string) {
>foo3 : (x: string | number) => string | number
>x : string | number

    // x is assigned in the if true branch, the type is not narrowed
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        x = "Hello"; // even though assigned using same type as narrowed expression
>x = "Hello" : string
>x : string | number

        return x; // string | number
>x : string | number
    }
    else {
        return x; // string | number
>x : string | number
    }
}
function foo4(x: number | string) {
>foo4 : (x: string | number) => string | number
>x : string | number

    // false branch updates the variable - so here it is not number
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        return x; // string | number
>x : string | number
    }
    else {
        x = 10; // even though assigned number - this should result in x to be string | number
>x = 10 : number
>x : string | number

        return x; // string | number
>x : string | number
    }
}
function foo5(x: number | string) {
>foo5 : (x: string | number) => string | number
>x : string | number

    // false branch updates the variable - so here it is not number
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        return x; // string | number
>x : string | number
    }
    else {
        x = "hello";
>x = "hello" : string
>x : string | number

        return x; // string | number
>x : string | number
    }
}
function foo6(x: number | string) {
>foo6 : (x: string | number) => string | number
>x : string | number

    // Modify in both branches
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        x = 10;
>x = 10 : number
>x : string | number

        return x; // string | number
>x : string | number
    }
    else {
        x = "hello";
>x = "hello" : string
>x : string | number

        return x; // string | number
>x : string | number
    }
}
function foo7(x: number | string | boolean) {
>foo7 : (x: string | number | boolean) => boolean
>x : string | number | boolean

    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number | boolean

        return x === "hello"; // string
>x === "hello" : boolean
>x : string
    }
    else if (typeof x === "boolean") {
>typeof x === "boolean" : boolean
>typeof x : string
>x : number | boolean

        return x; // boolean
>x : boolean
    }
    else {
        return x == 10; // number
>x == 10 : boolean
>x : number
    }
}
function foo8(x: number | string | boolean) {
>foo8 : (x: string | number | boolean) => boolean
>x : string | number | boolean

    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number | boolean

        return x === "hello"; // string
>x === "hello" : boolean
>x : string
    }
    else {
        var b: number | boolean = x; //  number | boolean
>b : number | boolean
>x : number | boolean

        if (typeof x === "boolean") {
>typeof x === "boolean" : boolean
>typeof x : string
>x : number | boolean

            return x; // boolean
>x : boolean
        }
        else {
            return x == 10; // number
>x == 10 : boolean
>x : number
        }
    }
}
function foo9(x: number | string) {
>foo9 : (x: string | number) => boolean
>x : string | number

    var y = 10;
>y : number

    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number

        // usage of x or assignment to separate variable shouldn't cause narrowing of type to stop
        y = x.length; 
>y = x.length : number
>y : number
>x.length : number
>x : string
>length : number

        return x === "hello"; // string
>x === "hello" : boolean
>x : string
    }
    else {
        return x == 10; // number
>x == 10 : boolean
>x : number
    }
}
function foo10(x: number | string | boolean) {
>foo10 : (x: string | number | boolean) => boolean
>x : string | number | boolean

    // Mixing typeguard narrowing in if statement with conditional expression typeguard
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number | boolean

        return x === "hello"; // string
>x === "hello" : boolean
>x : string
    }
    else {
        var y: boolean | string;
>y : string | boolean

        var b = x; // number | boolean
>b : number | boolean
>x : number | boolean

        return typeof x === "number"
>typeof x === "number"            ? x === 10 // number            : x : boolean
>typeof x === "number" : boolean
>typeof x : string
>x : number | boolean

            ? x === 10 // number
>x === 10 : boolean
>x : number

            : x; // x should be boolean
>x : boolean
    }
}
function foo11(x: number | string | boolean) {
>foo11 : (x: string | number | boolean) => string | number | boolean
>x : string | number | boolean

    // Mixing typeguard narrowing in if statement with conditional expression typeguard
    // Assigning value to x deep inside another guard stops narrowing of type too
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number | boolean

        return x; // string | number | boolean - x changed in else branch
>x : string | number | boolean
    }
    else {
        var y: number| boolean | string;
>y : string | number | boolean

        var b = x; // number | boolean | string - because below we are changing value of x in if statement
>b : string | number | boolean
>x : string | number | boolean

        return typeof x === "number"
>typeof x === "number"            ? (            // change value of x            x = 10 && x.toString() // number | boolean | string            )            : (            // do not change value            y = x && x.toString() // number | boolean | string            ) : string
>typeof x === "number" : boolean
>typeof x : string
>x : string | number | boolean

            ? (
>(            // change value of x            x = 10 && x.toString() // number | boolean | string            ) : string

            // change value of x
            x = 10 && x.toString() // number | boolean | string
>x = 10 && x.toString() : string
>x : string | number | boolean
>10 && x.toString() : string
>x.toString() : string
>x.toString : () => string
>x : string | number | boolean
>toString : () => string

            )
            : (
>(            // do not change value            y = x && x.toString() // number | boolean | string            ) : string

            // do not change value
            y = x && x.toString() // number | boolean | string
>y = x && x.toString() : string
>y : string | number | boolean
>x && x.toString() : string
>x : string | number | boolean
>x.toString() : string
>x.toString : () => string
>x : string | number | boolean
>toString : () => string

            );
    }
}
function foo12(x: number | string | boolean) {
>foo12 : (x: string | number | boolean) => string
>x : string | number | boolean

    // Mixing typeguard narrowing in if statement with conditional expression typeguard
    // Assigning value to x in outer guard shouldn't stop narrowing in the inner expression
    if (typeof x === "string") {
>typeof x === "string" : boolean
>typeof x : string
>x : string | number | boolean

        return x.toString(); // string | number | boolean - x changed in else branch
>x.toString() : string
>x.toString : () => string
>x : string | number | boolean
>toString : () => string
    }
    else {
        x = 10;
>x = 10 : number
>x : string | number | boolean

        var b = x; // number | boolean | string
>b : string | number | boolean
>x : string | number | boolean

        return typeof x === "number"
>typeof x === "number"            ? x.toString() // number            : x.toString() : string
>typeof x === "number" : boolean
>typeof x : string
>x : string | number | boolean

            ? x.toString() // number
>x.toString() : string
>x.toString : (radix?: number) => string
>x : number
>toString : (radix?: number) => string

            : x.toString(); // boolean | string
>x.toString() : string
>x.toString : () => string
>x : string | boolean
>toString : () => string
    }
}