Re: Ideas about colon operator syntax (and a patch in the work)

["Thomas Jericke" <tjericke@...>]

-----Original Message----- 
> From: "Dirk Laurie" <dirk.laurie@gmail.com> 
> To: "Lua mailing list" <lua-l@lists.lua.org> 
> Date: 01-05-2014 18:09 
> Subject: Re: Ideas about colon operator syntax (and a patch in the work) 
> 
> 2014-05-01 17:21 GMT+02:00 Thomas Jericke <tjericke@indel.ch>:
> 
> > print(lower"text":lower())
> >
> > would you pefer an error (like now) or left to right order assuming that
> >
> > print("text":lower())
> >
> > is valid syntax.
> 
> I prefer the error. It's the same error that you get if you write
> > print(beer"text":lower())
> There is no error if `lower` is defined.
> > local lower=string.lower; print(lower"text":lower())
> 
> How do you intend making "text":lower() valid syntax?
> The present demand for parentheses comes from:
> 
>    prefixexp ::= var | functioncall | ‘(’ exp ‘)’
> 
> Changing `prefixexp` may have other repercussions.

Well my ideal solution would be to not change prefixexp at all.
I would only change:
functioncall ::=  prefixexp args | prefixexp ‘:’ Name args 
into
functioncall ::=  prefixexp args | prefixexp ‘:’ Name args  | String ':' Name args | Number ':' Name args

But the way the Lua parser is written, this is not possible. Or I haven't found out yet how.
--
Thomas