Re: Lua and Saint-Exupery?

[David Given <dg@...>]

On Friday 25 February 2005 21:23, Mark Hamburg wrote:
[...]
> By what syntactic rule would you recognize that this was the correct
> parsing? You have no type information available about any of the keywords
> above. How would you distinguish between a parsing of:

You don't. Functions are always left-associative.

The Bison rule would go something like:

expression:
   leaf leftAssociativeOperator expression { ...+, -, etc... }
 | expression rightAssociativeOperator leaf { ...*, /, etc... }

leaf:
   atom '(' expressionList ')' { ...normal function call... }
 | atom expression { ...bracketless function call... }

atom:
   number
 | string
 | identifier
 | '{' expressionList '}'
 | etc

I *think* that's right... I way have gotten left associative and right 
associative the wrong way round, though.

-- 
"Curses! Foiled by the chilled dairy treats of righteousness!" --- Earthworm 
Jim (evil)