Re: [boost] Re: [ANN] Spirit C++ parser framework

From: joel de guzman (joel_at_[hidden])
Date: 2001-05-22 06:36:59

----- Original Message ----- 
From: "Vesa Karvonen" :
> Anyway, you are right that the above grammar is not LL(1). However, it is
> possible to transform it to LL(1) by using left factoring:
> 
>     C   -> f
>     C   -> ( f C'
>     C'  -> )
>     C'  -> , f )
> 

Left factoring and other tricks obfuscate the essence of the grammar.
In many cases, you'll face a brick wall, then you'll have to apply
more tricks. The simple if-then-else (dangling else problem) construct 
is a simple yet prime example.

Joel de Guzman