def add():
if 'ADDITIVE(' in current_tok:
a = AST.Add()
a.op = current_tok.split('(')[1].split(')')[0]
token('ADDITIVE(')
a.right = simple_expression()
return a
elif (current_tok in ('SC', 'THEN', 'DO', 'RP')) or ('COMPARE('
in current_tok):
return None
else:
raise ParserError
def p_Add(self, p):
'''Add : Expr plus Expr'''
p[0] = AST.Add( E1 = p[1], E2 = p[3],
lineno = p.lineno(1) )