Re: for loops in C style

[Evan Lavelle]

Ilyes Gouta wrote:

> Basically what it's done is enumerating all the possibilities for the
> construction of the for loop. Is it the only way do things clearly and
> properly?

There's no 'clear and proper' way to do this; do whatever's best for 
you, try it, fix it, repeat. Here's what I do:

iteration_statement
     ...
   | FOR '(' loop_init ';' loop_cond_opt ';' loop_term ')' loop_body {
       ...
     }
   ;

loop_init
   : /* nothing */               { ... }
   | full_expr                   { ... }
   ;

loop_cond_opt
   : /* nothing */               { ... }
   | full_expr                   { ... }
   ;

loop_term
   : /* nothing */               { ... }
   | full_expr                   { ... }
   ;

loop_body : ... ;

You can trivially change or fix the grammar; the real problem is the 
actions, and how you construct the AST. You'll also find that C grammars 
aren't much use to you, because assignments aren't expressions in your 
language.

Evan