7267
|
1 # lex_state5.py
|
|
2 #
|
|
3 # Bad state declaration
|
|
4
|
|
5 import sys
|
|
6 if ".." not in sys.path: sys.path.insert(0,"..")
|
|
7
|
|
8 import ply.lex as lex
|
|
9
|
|
10 tokens = [
|
|
11 "PLUS",
|
|
12 "MINUS",
|
|
13 "NUMBER",
|
|
14 ]
|
|
15
|
|
16 states = (('comment', 'exclusive'),
|
|
17 ('comment', 'exclusive'))
|
|
18
|
|
19 t_PLUS = r'\+'
|
|
20 t_MINUS = r'-'
|
|
21 t_NUMBER = r'\d+'
|
|
22
|
|
23 # Comments
|
|
24 def t_comment(t):
|
|
25 r'/\*'
|
|
26 t.lexer.begin('comment')
|
|
27 print("Entering comment state")
|
|
28
|
|
29 def t_comment_body_part(t):
|
|
30 r'(.|\n)*\*/'
|
|
31 print("comment body %s" % t)
|
|
32 t.lexer.begin('INITIAL')
|
|
33
|
|
34 def t_error(t):
|
|
35 pass
|
|
36
|
|
37
|
|
38 lex.lex()
|
|
39
|
|
40
|