From f465f3a21c4e814885d53ce29c7e6e4ab38db16f Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Fri, 4 Feb 2011 13:07:52 -0800
Subject: REQUIRED_USE: fix parens display and test more

---
 pym/portage/dep/__init__.py                   | 44 +++++++++++++++++++--------
 pym/portage/tests/dep/testCheckRequiredUse.py |  5 +++
 2 files changed, 36 insertions(+), 13 deletions(-)

diff --git a/pym/portage/dep/__init__.py b/pym/portage/dep/__init__.py
index 62e96d29a..b27d58956 100644
--- a/pym/portage/dep/__init__.py
+++ b/pym/portage/dep/__init__.py
@@ -1,5 +1,5 @@
 # deps.py -- Portage dependency resolution functions
-# Copyright 2003-2010 Gentoo Foundation
+# Copyright 2003-2011 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 __all__ = [
@@ -2206,7 +2206,10 @@ def check_required_use(required_use, use, iuse_match):
 						else:
 							stack[level].pop()
 							node._satisfied = True
-							node._parent._children.remove(node)
+							last_node = node._parent._children.pop()
+							if last_node is not node:
+								raise AssertionError(
+									"node is not last child of parent")
 							node = node._parent
 							continue
 						ignore = True
@@ -2216,20 +2219,28 @@ def check_required_use(required_use, use, iuse_match):
 					stack[level].append(satisfied)
 					node._satisfied = satisfied
 					if node._parent._operator not in ("||", "^^"):
-						offset = node._parent._children.index(node)
-						node._parent._children.pop(offset)
-						for i, child in enumerate(node._children):
-							node._parent._children.insert(offset + i, child)
+						last_node = node._parent._children.pop()
+						if last_node is not node:
+							raise AssertionError(
+								"node is not last child of parent")
+						for child in node._children:
+							node._parent._children.append(child)
 							if isinstance(child, _RequiredUseBranch):
 								child._parent = node._parent
 					node = node._parent
 					continue
 
 				if not node._children:
-					node._parent._children.remove(node)
+					last_node = node._parent._children.pop()
+					if last_node is not node:
+						raise AssertionError(
+							"node is not last child of parent")
 				elif len(node._children) == 1:
-					index = node._parent._children.index(node)
-					node._parent._children[index] = node._children[0]
+					last_node = node._parent._children.pop()
+					if last_node is not node:
+						raise AssertionError(
+							"node is not last child of parent")
+					node._parent._children.append(node._children[0])
 					if isinstance(node._children[0], _RequiredUseBranch):
 						node._children[0]._parent = node._parent
 						node = node._children[0]
@@ -2238,10 +2249,10 @@ def check_required_use(required_use, use, iuse_match):
 						if isinstance(child, _RequiredUseBranch) and \
 							child._operator is None and \
 							len(child._children) == 1:
-							node._children[index] = child._children[0]
-							if isinstance(node._children[index],
-								_RequiredUseBranch):
-								node._children[index]._parent = node
+							child = child._children[0]
+							node._children[index] = child
+							if isinstance(child, _RequiredUseBranch):
+								child._parent = node
 
 				node = node._parent
 			else:
@@ -2277,6 +2288,13 @@ def check_required_use(required_use, use, iuse_match):
 		raise InvalidDependString(
 			_("malformed syntax: '%s'") % required_use)
 
+	if len(tree._children) == 1:
+		child = tree._children[0]
+		if isinstance(child, _RequiredUseBranch) and \
+			child._operator is None:
+			tree = child
+			tree._parent = None
+
 	tree._satisfied = False not in stack[0]
 	return tree
 
diff --git a/pym/portage/tests/dep/testCheckRequiredUse.py b/pym/portage/tests/dep/testCheckRequiredUse.py
index 332c5a5df..c5a8f5304 100644
--- a/pym/portage/tests/dep/testCheckRequiredUse.py
+++ b/pym/portage/tests/dep/testCheckRequiredUse.py
@@ -190,6 +190,11 @@ class TestCheckRequiredUse(TestCase):
 				"^^ ( ( a b c ) ( b c !d ) )",
 				["a", "b", "c", "d"],
 				""
+			),
+			(
+				"|| ( ( ( ( a ) ) ( ( ( b c ) ) ) ) )",
+				[""],
+				"a b c"
 			)
 		)
 		for required_use, use, expected in test_cases:
-- 
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