Ambiguous syntax between namespace function call and map object definition.

function test() {
  return 'x';
}

let var1 = 'var1';
let x = {
  var1: test(),
  'var2': 1
} 

this code caused a parse error.

Looks like the reason is the parser consider `var1: test()` as a namespace function call but here I just want define a map keyed by variable.

Is it possible to disable 'namespace' feature to avoid this ambiguous syntax?

Thanks!