swc/crates/swc_ecma_parser/tests/tsc/destructuringObjectBindingPatternAndAssignment1ES5.ts

// In a destructuring assignment expression, the type of the expression on the right must be assignable to the assignment target on the left.
// An expression of type S is considered assignable to an assignment target V if one of the following is true

// V is an object assignment pattern and, for each assignment property P in V,
//      S is the type Any, or
var { a1 }: any = undefined;
var { a2 }: any = {};

// V is an object assignment pattern and, for each assignment property P in V,
//      S has an apparent property with the property name specified in
//          P of a type that is assignable to the target given in P, or
var { b1, } = { b1:1, };
var { b2: { b21 } = { b21: "string" }  } = { b2: { b21: "world" } };
var {1: b3} = { 1: "string" };
var {b4 = 1}: any = { b4: 100000 };
var {b5: { b52 }  } = { b5: { b52 } };

// V is an object assignment pattern and, for each assignment property P in V,
//      P specifies a numeric property name and S has a numeric index signature
//          of a type that is assignable to the target given in P, or

interface F {
    [idx: number]: boolean;
}

function foo(): F {
    return {
        1: true
    };
}

function bar(): F {
    return {
        2: true
    };
}
var {1: c0} = foo();
var {1: c1} = bar();

// V is an object assignment pattern and, for each assignment property P in V,
//      S has a string index signature of a type that is assignable to the target given in P

interface F1 {
    [str: string]: number;
}

function foo1(): F1 {
    return {
        "prop1": 2
    }
}

var {"prop1": d1} = foo1();
var {"prop2": d1} = foo1();