Erik Desjardins bca170ad79 Avoid duplicating impure expressions in object rest destructuring (#5151)
* avoid duplicating impure initializers in object rest destructuring

* reuse existing VariableDeclarations in object rest destructuring, to fix two issues:

1. inserting an additional VariableDeclaration after the current one may change order of operations, which is unsafe if a future VariableDeclarator refers to a destructured variable.

2. The entire VariableDeclaration is removed when all properties are rest properties, indiscriminately removing other variables
2017-01-18 21:32:44 -05:00

8 lines
134 B
JavaScript

const { s, ...t } = foo();
const { s: { q1, ...q2 }, ...q3 } = bar();
const { a } = foo(({ b, ...c }) => {
console.log(b, c);
});