Convert old-style classes in Subst.py to new-style classes.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/engine/SCons/Subst.py b/src/engine/SCons/Subst.py
index be52772..98097dc 100644
--- a/src/engine/SCons/Subst.py
+++ b/src/engine/SCons/Subst.py
@@ -58,7 +58,7 @@ def raise_exception(exception, target, s):
 
 
 
-class Literal:
+class Literal(object):
     """A wrapper for a string.  If you use this object wrapped
     around a string, then it will be interpreted as literal.
     When passed to the command interpreter, all special
@@ -78,7 +78,7 @@ class Literal:
     def is_literal(self):
         return 1
 
-class SpecialAttrWrapper:
+class SpecialAttrWrapper(object):
     """This is a wrapper for what we call a 'Node special attribute.'
     This is any of the attributes of a Node that we can reference from
     Environment variable substitution, such as $TARGET.abspath or
@@ -160,7 +160,7 @@ def escape_list(mylist, escape_func):
             return e(escape_func)
     return list(map(escape, mylist))
 
-class NLWrapper:
+class NLWrapper(object):
     """A wrapper class that delays turning a list of sources or targets
     into a NodeList until it's needed.  The specified function supplied
     when the object is initialized is responsible for turning raw nodes
@@ -221,7 +221,7 @@ class Targets_or_Sources(collections.UserList):
         nl = self.nl._create_nodelist()
         return repr(nl)
 
-class Target_or_Source:
+class Target_or_Source(object):
     """A class that implements $TARGET or $SOURCE expansions by in turn
     wrapping a NLWrapper.  This class handles the different methods used
     to access an individual proxy Node, calling the NLWrapper to create
@@ -395,7 +395,7 @@ def scons_subst(strSubst, env, mode=SUBST_RAW, target=None, source=None, gvars={
     if isinstance(strSubst, str) and strSubst.find('$') < 0:
         return strSubst
 
-    class StringSubber:
+    class StringSubber(object):
         """A class to construct the results of a scons_subst() call.
 
         This binds a specific construction environment, mode, target and