expParser: obj
%visible expAst
next:
exp:
out N: ref Node:left:right
term:
out N: ref node:left:right
primary:
out N: ref Node:left:right
number:
out N: ref node:left:right
digit:
out N: ref Node:left:right
syntaxError:
parse:
N: ref Node:left:right
inn: ref String
pos: var integer
ch: var integer