> The problem is that imports are not normal variable assignments. They
> do not copy values, like normal destructuring, they are aliasing
> bindings! If you were to allow arbitrary expressions and patterns,
> then this would imply aliasing of arbitrary object properties. Not
> only is this a completely new feature, it also is rather questionable
> -- the aliased location might disappear, because objects are mutable.
Could it be structured so that using `export` directly on a variable exported
the alias, while using `import { x: [ a, b ] } from A; ` was basically just
sugar for `import { x } from A; let [ a, b ] = x;` so that a and b copied not
aliased? Example: module A { export let x = { a: 1, b: 2 };
export function f() { x = { a: 3, b: 4 }; }; } ... import { x: { a,
b }, f } from A; f(); print(a); // 1 print(b); // 2 ... import
{ x, f } from A; f(); print(x.a); // 3 print(x.b); // 4
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