1 files changed, 37 insertions, 0 deletions
diff --git a/Lib/regexp.py b/Lib/regexp.py
new file mode 100644
index 0000000000..fc6fcad2a2
--- /dev/null
+++ b/Lib/regexp.py
@@ -0,0 +1,37 @@
+# Provide backward compatibility for module "regexp" using "regex".
+
+import regex
+from regex_syntax import *
+
+class Prog:
+	def init(self, pat):
+		save_syntax = regex.set_syntax(RE_SYNTAX_AWK)
+		try:
+			self.prog = regex.compile(pat)
+		finally:
+			xxx = regex.set_syntax(save_syntax)
+		return self
+	def match(self, args):
+		if type(args) = type(()):
+			str, offset = args
+		else:
+			str, offset = args, 0
+		if self.prog.search(str, offset) < 0:
+			return ()
+		regs = self.prog.regs()
+		i = len(regs)
+		while i > 0 and regs[i-1] = (-1, -1):
+			i = i-1
+		return regs[:i]
+
+def compile(pat):
+	return Prog().init(pat)
+
+cache_pat = None
+cache_prog = None
+
+def match(pat, str):
+	global cache_pat, cache_prog
+	if pat <> cache_pat:
+		cache_pat, cache_prog = pat, compile(pat)
+	return cache_prog.match(str)