# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1477583728 -7200
# Node ID 37644d46a4142a4cdc8e616cb44f9249beb3cedd
# Parent  f06dc96f9ab769af95e6b6e5c337c87d0df23c86
Renamed the bool class to boolean, adding a bool function to test objects.
Introduced various native methods to support boolean and other operations.

diff -r f06dc96f9ab7 -r 37644d46a414 lib/__builtins__/bool.py
--- a/lib/__builtins__/bool.py	Wed Oct 26 16:36:17 2016 +0200
+++ b/lib/__builtins__/bool.py	Thu Oct 27 17:55:28 2016 +0200
@@ -19,14 +19,17 @@
 this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
-class bool(object):
+class boolean(object):
     def __bool__(self):
         "Identity operation."
         return self
     def __str__(self):
         return self is True and "True" or "False"
 
-False = bool()
-True = bool()
+False = boolean()
+True = boolean()
+
+def bool(obj):
+    return obj.__bool__()
 
 # vim: tabstop=4 expandtab shiftwidth=4
diff -r f06dc96f9ab7 -r 37644d46a414 lib/__builtins__/list.py
--- a/lib/__builtins__/list.py	Wed Oct 26 16:36:17 2016 +0200
+++ b/lib/__builtins__/list.py	Thu Oct 27 17:55:28 2016 +0200
@@ -21,6 +21,7 @@
 
 from __builtins__.iterator import listiterator
 from __builtins__.sequence import _getitem, _getslice
+import native
 
 class list(object):
 
@@ -33,9 +34,9 @@
         if args is not None:
             self.extend(args)
 
-    def __new__(self):
         # Reserve space for a fragment reference.
-        self._elements = None
+
+        self.__data__ = None
 
     def __getitem__(self, index):
 
@@ -68,7 +69,13 @@
     def pop(self): pass
     def reverse(self): pass
     def sort(self, cmp=None, key=None, reverse=0): pass
-    def __len__(self): pass
+
+    def __len__(self):
+
+        "Return the length of the list."
+
+        return native._list_len(self)
+
     def __add__(self, other): pass
     def __iadd__(self, other): pass
     def __str__(self): pass
@@ -77,7 +84,7 @@
 
         "Lists are true if non-empty."
 
-        return self.__len__() != 0
+        return native._list_nonempty(self)
 
     def __iter__(self):
 
@@ -87,6 +94,10 @@
 
     # Special implementation methods.
 
-    def __get_single_item__(self, index): pass
+    def __get_single_item__(self, index):
+
+        "Return the item at 'index'."
+
+        return native._list_element(self, index)
 
 # vim: tabstop=4 expandtab shiftwidth=4
diff -r f06dc96f9ab7 -r 37644d46a414 lib/__builtins__/str.py
--- a/lib/__builtins__/str.py	Wed Oct 26 16:36:17 2016 +0200
+++ b/lib/__builtins__/str.py	Thu Oct 27 17:55:28 2016 +0200
@@ -71,11 +71,13 @@
         "Return a new boolean for the comparison."
         return _negate(self.__eq__(other))
 
-    def __len__(self): pass
+    def __len__(self):
+        return native._str_len(self)
+
     def __str__(self): pass
 
     def __bool__(self):
-        return _negate(native._str_eq(self, ""))
+        return native._str_nonempty(self)
 
     def endswith(self, s): pass
     def find(self, sub, start=None, end=None): pass
diff -r f06dc96f9ab7 -r 37644d46a414 lib/native.py
--- a/lib/native.py	Wed Oct 26 16:36:17 2016 +0200
+++ b/lib/native.py	Thu Oct 27 17:55:28 2016 +0200
@@ -45,6 +45,12 @@
 def _str_lt(self, other): pass
 def _str_gt(self, other): pass
 def _str_eq(self, other): pass
+def _str_len(self): pass
+def _str_nonempty(self): pass
+
+def _list_len(self): pass
+def _list_nonempty(self): pass
+def _list_element(self, index): pass
 
 def _isinstance(obj, cls): pass