Refactor node classes to have constructors and change some names.

I corrected the spelling of 'infered' to 'infered' and changed some to
make them more consistent with the built-in ast module and to read
better in English.  I created aliases with proxy objects to maintain
backwards compatibility.

I also refactored the node classes so that they have __init__ and
postinit functions.  The postinit function has to be called after the
creation of a parent with the instances of its children because the
node __init__ functions have to take a parent instance to maintain the
doubly-linked structure of the AST.  This involved moving considerable
amounts of node-construction logic from rebuilder.py to
node_classes.py and scoped_nodes.py.

1 files changed, 20 insertions, 0 deletions

diff --git a/astroid/nodes.py b/astroid/nodes.py
index 4325c7e2..82b2fb7a 100644
--- a/astroid/nodes.py
+++ b/astroid/nodes.py
@@ -38,6 +38,8 @@ on ImportFrom and Import :
 
 __docformat__ = "restructuredtext en"
 
+import lazy_object_proxy
+
 from astroid.node_classes import (
     Arguments, AssignAttr, Assert, Assign,
     AssignName, AugAssign, Repr, BinOp, BoolOp, Break, Call, Compare,
@@ -53,6 +55,7 @@ from astroid.scoped_nodes import (
     ListComp, SetComp, FunctionDef, ClassDef,
 )
 
+
 ALL_NODE_CLASSES = (
     Arguments, AssignAttr, Assert, Assign, AssignName, AugAssign,
     Repr, BinOp, BoolOp, Break,
@@ -75,3 +78,20 @@ ALL_NODE_CLASSES = (
     While, With,
     Yield, YieldFrom
     )
+
+
+# Backward-compatibility aliases
+def proxy_alias(alias_name, node_type):
+    proxy = type(alias_name, (lazy_object_proxy.Proxy,),
+                {'__class__': object.__dict__['__class__']})
+    return proxy(node_type)
+
+Backquote = proxy_alias('Backquote', Repr)
+Discard = proxy_alias('Discard', Expr)
+AssName = proxy_alias('AssName', AssignName)
+AssAttr = proxy_alias('AssAttr', AssignAttr)
+GetAttr = proxy_alias('GetAttr', Attribute)
+CallFunc = proxy_alias('CallFunc', Call)
+Class = proxy_alias('Class', ClassDef)
+Function = proxy_alias('Function', FunctionDef)
+GenExpr = proxy_alias('GenExpr', GeneratorExp)