Add external dependency on the total_ordering package.

It is used as a compatibility workaround for python 2.6.

Signed-off-by: Matěj Cepl <mcepl@cepl.eu>

1 files changed, 11 insertions, 7 deletions

diff --git a/registry/gl.py b/registry/gl.py
index e87bf5ca5..f00f9057f 100644
--- a/registry/gl.py
+++ b/registry/gl.py
@@ -29,7 +29,11 @@ from __future__ import print_function
 import os.path
 import re
 import sys
-import functools
+try:
+    from functools import total_ordering
+except ImportError:
+    from total_ordering import total_ordering
+
 from copy import copy, deepcopy
 
 import six
@@ -382,7 +386,7 @@ class Registry(object):
         self.vendor_namespaces.remove(None)
 
 
-@functools.total_ordering
+@total_ordering
 class Feature(object):
     """A <feature> XML element.
 
@@ -487,7 +491,7 @@ class Feature(object):
             link(enum)
 
 
-@functools.total_ordering
+@total_ordering
 class Extension(object):
     """An <extension> XML element.
 
@@ -604,7 +608,7 @@ class Extension(object):
                 link(xml_req, enum)
 
 
-@functools.total_ordering
+@total_ordering
 class Requirement(object):
     """A <require> XML element, which links a provider (Feature or Extension)
     to a provided (Command or Enum) for a set of apis.
@@ -722,7 +726,7 @@ class CommandParam(object):
         return templ.format(self=self)
 
 
-@functools.total_ordering
+@total_ordering
 class Command(object):
     """A <command> XML element.
 
@@ -879,7 +883,7 @@ class Command(object):
         )
 
 
-@functools.total_ordering
+@total_ordering
 class CommandAliasSet(ImmutableOrderedKeyedSet):
 
     def __init__(self, commands):
@@ -1109,7 +1113,7 @@ class EnumGroup(object):
             self.type = 'special'
 
 
-@functools.total_ordering
+@total_ordering
 class Enum(object):
     """An <enum> XML element.