Re: Syntactic sugar for function parameters

[Rici Lake <lua@...>]

On 4-Feb-07, at 7:55 PM, Miles Bader wrote:

> Fabien <fleutot+lua@gmail.com> writes:
> > I've also experimented with shorted syntaxes for multiple statements 
> > instead
> > of single expressions as aboved, but in the end I felt that it wasn't 
> > worth
> > it. However, you can still use it (it's "do |foo, bar| stat1; 
> > stat2;...statn
> > end"  in the currently available version IIRC), or define whatever 
> > suits
> > you.
>
> Hmm, since square-brackets are currently not valid in an
> "expression-initial" context in lua, how about just using them as
> syntactic sugar for an anonymous function?

That conflicts with [ ] in table syntax; although it's not strictly 
speaking ambiguous, I don't think, it certainly stops being LL(2), so a 
recursive descent parser is much more difficult. (The question is at 
what point you know that a [ indicates a key-value expression, rather 
than a value.) Also, if you actually wanted to put a [...] block as a 
key, you'd need to remember to put a space in, to avoid having [[ turn 
into the start of a long string.