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// @strictNullChecks: true
type foo = {
bar: number | null;
baz: string;
nested: {
a: number;
b: string | null;
}
};
const aFoo: foo = { bar: 3, baz: "b", nested: { a: 1, b: "y" } };
if (aFoo.bar && aFoo.nested.b) {
const { bar, baz, nested: {a, b: text} } = aFoo;
const right: number = aFoo.bar;
const wrong: number = bar;
const another: string = baz;
const aAgain: number = a;
const bAgain: string = text;
}
type bar = {
elem1: number | null;
elem2: foo | null;
};
const bBar = { elem1: 7, elem2: aFoo };
if (bBar.elem2 && bBar.elem2.bar && bBar.elem2.nested.b) {
const { bar, baz, nested: {a, b: text} } = bBar.elem2;
const right: number = bBar.elem2.bar;
const wrong: number = bar;
const another: string = baz;
const aAgain: number = a;
const bAgain: string = text;
}
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