File: noImplicitThisFunctions.ts

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node-typescript 2.1.5-1
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// @noImplicitThis: true

function f1(x) {
    // implicit any is still allowed
    return x + 1;
}

function f2(y: number) {
    // ok: no reference to this
    return y + 1;
}

function f3(z: number): number {
    // error: this is implicitly any
    return this.a + z;
}

// error: `this` is `window`, but is still of type `any`
let f4: (b: number) => number = b => this.c + b;