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comparison ply-3.8/test/lex_optimize3.py @ 7267:343ff337a19b

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<ais523> ` tar -xf ply-3.8.tar.gz
author HackBot
date Wed, 23 Mar 2016 02:40:16 +0000
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7266:61a39a120dee 7267:343ff337a19b
1 # -----------------------------------------------------------------------------
2 # lex_optimize3.py
3 #
4 # Writes table in a subdirectory structure.
5 # -----------------------------------------------------------------------------
6 import sys
7
8 if ".." not in sys.path: sys.path.insert(0,"..")
9 import ply.lex as lex
10
11 tokens = (
12 'NAME','NUMBER',
13 'PLUS','MINUS','TIMES','DIVIDE','EQUALS',
14 'LPAREN','RPAREN',
15 )
16
17 # Tokens
18
19 t_PLUS = r'\+'
20 t_MINUS = r'-'
21 t_TIMES = r'\*'
22 t_DIVIDE = r'/'
23 t_EQUALS = r'='
24 t_LPAREN = r'\('
25 t_RPAREN = r'\)'
26 t_NAME = r'[a-zA-Z_][a-zA-Z0-9_]*'
27
28 def t_NUMBER(t):
29 r'\d+'
30 try:
31 t.value = int(t.value)
32 except ValueError:
33 print("Integer value too large %s" % t.value)
34 t.value = 0
35 return t
36
37 t_ignore = " \t"
38
39 def t_newline(t):
40 r'\n+'
41 t.lineno += t.value.count("\n")
42
43 def t_error(t):
44 print("Illegal character '%s'" % t.value[0])
45 t.lexer.skip(1)
46
47 # Build the lexer
48 lex.lex(optimize=1,lextab="lexdir.sub.calctab" ,outputdir="lexdir/sub")
49 lex.runmain(data="3+4")
50
51
52