I see that babel.js decorators (available in \"stage 1\") implement the spec at https://github.com/wycats/javascript-decorators. It appears that decorators are limited to (1) cl
You certainly have a point here.
But as neo_blackcap pointed out, function decorator are not part of the ES7 decorators draft.
So, the best thing you can do is to start discussion on the corresponding tracker to attract community attention to your proposal.
ES7 decorators are on their first stage of development second stage of development, meaning that their API is still under development and could undergo any change.