I'm rather new to high level parsing with lex/yacc (and realy impressed so far).
I'd like to parse *and execute* files like this: A=12 B=23 G X=A Y=B Z=34 # Move to X, Y, Z G Z=0 etc. No problems so far. But when loops enter the game, things seem to become more difficult: A=12 B=23 C=45 D=56 DX=0 FOR C # Exec the following lines C times G X=A+DX Y=B Z=34 # Move to X, Y, Z # more statements... DX=DX+67 NEXT How can I tell PLY to go back to the beginning of the FOR-loop's body to execute it C-1 more times? A syntax checker would not need to do that, but an interpreter (which actually I am building) has to. Any hints are welcome. Kind regards Franz GEIGER -- http://mail.python.org/mailman/listinfo/python-list
