/media/sda-magnetic/david/Extern-Magnetic-2022-06-29/Extern01/Dokumente-11-2021-07-05/informatik-math/informatik2/bash-programming/lex-yacc-bash-etc/grammatik08.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)