Handle private names

(Hard to believe these were never handled before)

Add misc.mangle() that mangles based on the rules in compile.c.
XXX Need to test the corner cases

Update CodeGenerator with a class_name attribute bound to None.  If a
particular instance is created within a class scope, the instance's
class_name is bound to that class's name.

Add mangle() method to CodeGenerator that mangles if the class_name
has a class_name in it.

Modify the FunctionCodeGenerator family to handle an extra argument--
the class_name.

Wrap all name ops and attrnames in calls to self.mangle()

1 files changed, 24 insertions, 13 deletions

diff --git a/Lib/compiler/pycodegen.py b/Lib/compiler/pycodegen.py
index 37b51bf44d..ced0f07d42 100644
--- a/Lib/compiler/pycodegen.py
+++ b/Lib/compiler/pycodegen.py
@@ -117,9 +117,6 @@ def is_constant_false(node):
             return 1
     return 0
 
-def mangle(name):
-    return name
-
 class CodeGenerator:
     """Defines basic code generator for Python bytecode
 
@@ -136,6 +133,7 @@ class CodeGenerator:
 
     optimized = 0 # is namespace access optimized?
     __initialized = None
+    class_name = None # provide default for instance variable
 
     def __init__(self, filename):
         if self.__initialized is None:
@@ -175,6 +173,12 @@ class CodeGenerator:
         """Return a code object"""
         return self.graph.getCode()
 
+    def mangle(self, name):
+        if self.class_name is not None:
+            return misc.mangle(name, self.class_name)
+        else:
+            return name
+
     # Next five methods handle name access
 
     def isLocalName(self, name):
@@ -190,6 +194,7 @@ class CodeGenerator:
         self._nameOp('DELETE', name)
 
     def _nameOp(self, prefix, name):
+        name = self.mangle(name)
         if not self.optimized:
             self.emit(prefix + '_NAME', name)
             return
@@ -258,7 +263,8 @@ class CodeGenerator:
         self._visitFuncOrLambda(node, isLambda=1)
 
     def _visitFuncOrLambda(self, node, isLambda=0):
-        gen = self.FunctionGen(node, self.filename, self.scopes, isLambda)
+        gen = self.FunctionGen(node, self.filename, self.scopes, isLambda,
+                               self.class_name)
         walk(node.code, gen)
         gen.finish()
         self.set_lineno(node)
@@ -645,7 +651,7 @@ class CodeGenerator:
 
     def visitGetattr(self, node):
         self.visit(node.expr)
-        self.emit('LOAD_ATTR', node.attrname)
+        self.emit('LOAD_ATTR', self.mangle(node.attrname))
 
     # next five implement assignments
 
@@ -671,9 +677,9 @@ class CodeGenerator:
     def visitAssAttr(self, node):
         self.visit(node.expr)
         if node.flags == 'OP_ASSIGN':
-            self.emit('STORE_ATTR', node.attrname)
+            self.emit('STORE_ATTR', self.mangle(node.attrname))
         elif node.flags == 'OP_DELETE':
-            self.emit('DELETE_ATTR', node.attrname)
+            self.emit('DELETE_ATTR', self.mangle(node.attrname))
         else:
             print "warning: unexpected flags:", node.flags
             print node
@@ -728,10 +734,10 @@ class CodeGenerator:
         if mode == "load":
             self.visit(node.expr)
             self.emit('DUP_TOP')
-            self.emit('LOAD_ATTR', node.attrname)
+            self.emit('LOAD_ATTR', self.mangle(node.attrname))
         elif mode == "store":
             self.emit('ROT_TWO')
-            self.emit('STORE_ATTR', node.attrname)
+            self.emit('STORE_ATTR', self.mangle(node.attrname))
 
     def visitAugSlice(self, node, mode):
         if mode == "load":
@@ -987,6 +993,7 @@ class NestedScopeCodeGenerator(CodeGenerator):
         self.__super_visitModule(node)
 
     def _nameOp(self, prefix, name):
+        name = self.mangle(name)
         scope = self.scope.check_name(name)
         if scope == SC_LOCAL:
             if not self.optimized:
@@ -1002,7 +1009,8 @@ class NestedScopeCodeGenerator(CodeGenerator):
                   (name, scope)
 
     def _visitFuncOrLambda(self, node, isLambda=0):
-        gen = self.FunctionGen(node, self.filename, self.scopes, isLambda)
+        gen = self.FunctionGen(node, self.filename, self.scopes, isLambda,
+                               self.class_name)
         walk(node.code, gen)
         gen.finish()
         self.set_lineno(node)
@@ -1079,7 +1087,8 @@ class AbstractFunctionCode:
     optimized = 1
     lambdaCount = 0
 
-    def __init__(self, func, filename, scopes, isLambda):
+    def __init__(self, func, filename, scopes, isLambda, class_name):
+        self.class_name = class_name
         if isLambda:
             klass = FunctionCodeGenerator
             name = "<lambda.%d>" % klass.lambdaCount
@@ -1142,10 +1151,10 @@ class NestedFunctionCodeGenerator(AbstractFunctionCode,
     super_init = NestedScopeCodeGenerator.__init__ # call be other init
     __super_init = AbstractFunctionCode.__init__
 
-    def __init__(self, func, filename, scopes, isLambda):
+    def __init__(self, func, filename, scopes, isLambda, class_name):
         self.scopes = scopes
         self.scope = scopes[func]
-        self.__super_init(func, filename, scopes, isLambda)
+        self.__super_init(func, filename, scopes, isLambda, class_name)
         self.graph.setFreeVars(self.scope.get_free_vars())
         self.graph.setCellVars(self.scope.get_cell_vars())
 ##        self.graph.setFlag(CO_NESTED)
@@ -1153,6 +1162,7 @@ class NestedFunctionCodeGenerator(AbstractFunctionCode,
 class AbstractClassCode:
 
     def __init__(self, klass, filename, scopes):
+        self.class_name = klass.name
         self.graph = pyassem.PyFlowGraph(klass.name, filename,
                                            optimized=0)
         self.super_init(filename)
@@ -1163,6 +1173,7 @@ class AbstractClassCode:
             self.setDocstring(klass.doc)
 
     def _nameOp(self, prefix, name):
+        name = self.mangle(name)
         # Class namespaces are always unoptimized
         self.emit(prefix + '_NAME', name)