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Re: Proposal: allow @, ,ドル !, and ? in Lua identifiers

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It was thus said that the Great Coroutines once stated:
> I'd like to discuss allowing @, ,ドル !, and ? in identifier names. I
> chose these explicitly because they can't be confused with an operator
> at the end of an identifier.
> 
> >From what I understand, it's common practice in Ruby and Lisp to write
> methods like this if you intend they return a boolean:
> 
> empty?(some_table) -- returns true if some_table is empty
> 
> Usually is_empty() is what I see people use because it's clear that
> the function is testing for emptiness and not emptying the table.
> 
> The problem is you sometimes wind up writing this terrible thing: if
> not is_empty(tbl) then ... end
> 
> Ruby also makes it convention to put ! at the end of the function name
> if if modifies its `self'. The non-! version returns a modified copy.
> 
> I feel like these 2 added characters alone would make it much easier
> to express semantic in function names.
> 
> @ could be used if a function creates an object that internally
> references the object it was created from, so you'd know whether to
> copy or deep-copy later.
> 
> I'd propose using $ if a function has side-effects, or performs some
> form of I/O -- but I'd love to hear other ideas. I've never seen $
> used except as an operator in Haskell -- the expression on the
> right-hand side gets evaluated and passed to the expression on its
> left-hand side. What could it mean as part of a function name?
	function panic!!!!(message)
	 print@(screen.width/2,screen.height/2,message)
	 sys$wait("5s")
	 why_must_i_die?("now")
	end
 -spc (If you want to enforce a convention, make it part of the langauge)

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