lex_state_noerror.py (550B)
1# lex_state2.py 2# 3# Declaration of a state for which no rules are defined 4 5import sys 6sys.path.insert(0,"..") 7 8import ply.lex as lex 9 10tokens = [ 11 "PLUS", 12 "MINUS", 13 "NUMBER", 14 ] 15 16comment = 1 17states = (('comment', 'exclusive'),) 18 19t_PLUS = r'\+' 20t_MINUS = r'-' 21t_NUMBER = r'\d+' 22 23# Comments 24def t_comment(t): 25 r'/\*' 26 t.lexer.begin('comment') 27 print "Entering comment state" 28 29def t_comment_body_part(t): 30 r'(.|\n)*\*/' 31 print "comment body", t 32 t.lexer.begin('INITIAL') 33 34def t_error(t): 35 pass 36 37import sys 38 39lex.lex() 40 41