Lua function syntax sugar for a digit started function name?

[y s <y.s.outside@...>]

Lua 5.1.4

For example:

> bar = {} 
> bar.name = 'test' 
> bar['123.com'] = function(self) print(self.name) end

I can't call the method like below:

> bar:['123.com']() 
> stdin:1: '<name>' expected near '['

Althought below works:

> bar['123.com'](bar)

But I this is somehow ugly. Is there a syntax sugar for this situation?

Or if it really cannot do it, will Lua team add this syntax in future?

Or Lua team did this intentionally?