parse regexp syntax into regexp call instead of re2, define regexp in stdlib

Author: mks-m

pixie/stdlib.pxi

@@ -3072,3 +3072,10 @@ ex: (vary-meta x assoc :foo 42)"
             (swap! cache assoc argsv ret)
             ret)
           val)))))
+
+(defn regexp
+  {:doc "Returns internal representation for regular
+   expression, used in matching functions."
+   :signatures [[rexegp-str opts]]}
+  [regexp-str opts]
+  (println (str regexp-str " " opts)))

pixie/vm/reader.py

@@ -648,7 +648,7 @@ def invoke(self, rdr, ch):
             except EOFError:
                 break
 
-        return rt.cons(symbol(u"re2"), rt.cons(regex_str, rt.cons(regex_opts, nil)))
+        return rt.cons(symbol(u"regexp"), rt.cons(regex_str, rt.cons(regex_opts, nil)))
 
 dispatch_handlers = {
     u"{": SetReader(),