Suggestion: Allow function names starting with @

Considering the @reactive decorator, its usage is very clear: @reactive accessor value.

However for the definition it is not that clear:

function reactive(target, desc) {
  // ...
  return { get, set, init }
}

It may looks more confusing if the decorator itself takes arguments.

So if it can be defined with a @ prefix in its name then everyone knows it is a decorator:

function @reactive(target, desc) { }

And this also allows decorators and normal functions share names:

function @foo () {}
funcition foo() {}

foo() // function foo is called

@foo // function @foo is chosen because it is more specific. 
bar

Start with the decorator syntax and function examples in this issue, then compare the proposed @-prefixed names with the current decorators proposal. No files or tests are identified; done would require a decided syntax and its interactions with ordinary function names to be specified in the proposal.