/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/fsm/fsm/bash-programming/lex-yacc-bash-etc/grammatik16.txt

statement           ->      assignment | cond | loop
assignment          ->      id := expr
cond                ->      if boolexpr then statement fi
                            | if boolexpr then statement else statement fi
loop                ->      while boolexpr do statement od
expr                ->      boolexpr | numexpr
boolexpr            ->      numexpr cop numexpr
numexpr             ->      numexpr + term | term
term                ->      term * factor | factor
factor              ->      id | const | (numexpr)