RethinkDB native connector work, minor fixes.

ext/librethinkdbxx/reql/gen.py

@@ -0,0 +1,33 @@
+from sys import argv
+from re import sub, finditer, VERBOSE
+
+def gen(defs):
+    indent = 0
+    enum = False
+    def p(s): print(" " * (indent * 4) + s)
+    for item in finditer("""
+        (?P<type> message|enum) \\s+ (?P<name> \\w+) \\s* \\{ |
+        (?P<var> \\w+) \\s* = \\s* (?P<val> \\w+) \\s* ; |
+        \\}
+        """, defs, flags=VERBOSE):
+        if item.group(0) == "}":
+            indent = indent - 1
+            p("};" if enum else "}")
+            enum = False;
+        elif item.group('type') == 'enum':
+            p("enum class %s {" % item.group('name'))
+            indent = indent + 1
+            enum = True
+        elif item.group('type') == 'message':
+            p("namespace %s {" % item.group('name'))
+            indent = indent + 1
+            enum = False
+        else:
+            if enum:
+                p("%s = %s," % (item.group('var'), item.group('val')))
+
+print("// Auto-generated by reql/gen.py")
+print("#pragma once")
+print("namespace RethinkDB { namespace Protocol {")
+gen(sub("//.*", "", open(argv[1]).read()))
+print("} }")