Lib/regexp.py

   1 # Provide backward compatibility for module "regexp" using "regex".
   2
   3 import regex
   4 from regex_syntax import *
   5
   6 class Prog:
   7         def __init__(self, pat):
   8                 save_syntax = regex.set_syntax(RE_SYNTAX_AWK)
   9                 try:
  10                         self.prog = regex.compile(pat)
  11                 finally:
  12                         xxx = regex.set_syntax(save_syntax)
  13         def match(self, str, offset = 0):
  14                 if self.prog.search(str, offset) < 0:
  15                         return ()
  16                 regs = self.prog.regs
  17                 i = len(regs)
  18                 while i > 0 and regs[i-1] == (-1, -1):
  19                         i = i-1
  20                 return regs[:i]
  21
  22 def compile(pat):
  23         return Prog(pat)
  24
  25 cache_pat = None
  26 cache_prog = None
  27
  28 def match(pat, str):
  29         global cache_pat, cache_prog
  30         if pat <> cache_pat:
  31                 cache_pat, cache_prog = pat, compile(pat)
  32         return cache_prog.match(str)