# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1480781519 -3600
# Node ID fc291b59f67b14a2429cec0d34120d88ad577c27
# Parent  95b8056f3a79920c2676d863936c38506f6caa20
Implemented the inversion operator for integers.

diff -r 95b8056f3a79 -r fc291b59f67b lib/__builtins__/int.py
--- a/lib/__builtins__/int.py	Sat Dec 03 16:44:55 2016 +0100
+++ b/lib/__builtins__/int.py	Sat Dec 03 17:11:59 2016 +0100
@@ -114,6 +114,12 @@
 
         return self._binary_op(native._int_xor, other)
 
+    def __invert__(self):
+
+        "Return the inversion of this int."
+
+        return native._int_not(self.__data__)
+
     __add__ = __radd__ = __iadd__
     __sub__ = __isub__
 
@@ -192,8 +198,6 @@
 
         return _negate(self.__eq__(other))
 
-    def __invert__(self): pass
-
     def __neg__(self):
 
         "Apply the unary negation operator."
diff -r 95b8056f3a79 -r fc291b59f67b lib/native.py
--- a/lib/native.py	Sat Dec 03 16:44:55 2016 +0100
+++ b/lib/native.py	Sat Dec 03 17:11:59 2016 +0100
@@ -42,6 +42,7 @@
 def _int_sub(self, other): pass
 
 def _int_and(self, other): pass
+def _int_not(self): pass
 def _int_or(self, other): pass
 def _int_xor(self, other): pass
 
diff -r 95b8056f3a79 -r fc291b59f67b lib/operator/unary.py
--- a/lib/operator/unary.py	Sat Dec 03 16:44:55 2016 +0100
+++ b/lib/operator/unary.py	Sat Dec 03 17:11:59 2016 +0100
@@ -3,7 +3,7 @@
 """
 Operator support.
 
-Copyright (C) 2010, 2013, 2015 Paul Boddie <paul@boddie.org.uk>
+Copyright (C) 2010, 2013, 2015, 2016 Paul Boddie <paul@boddie.org.uk>
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -25,9 +25,6 @@
 # lambda functions. Thus, the appropriate methods are defined locally, but no
 # attempt to obtain them is made until the generic function is called.
 
-# NOTE: The compiler should make it possible for the following functions to call
-# NOTE: the generic operator implementations with no additional call overhead.
-
 # Unary operator functions.
 
 def invert(a):
diff -r 95b8056f3a79 -r fc291b59f67b templates/native.c
--- a/templates/native.c	Sat Dec 03 16:44:55 2016 +0100
+++ b/templates/native.c	Sat Dec 03 17:11:59 2016 +0100
@@ -243,6 +243,16 @@
     return __new_int(i & j);
 }
 
+__attr __fn_native__int_not(__attr __args[])
+{
+    __attr * const _data = &__args[1];
+    /* _data interpreted as int */
+    int i = _data->intvalue;
+
+    /* Return the new integer. */
+    return __new_int(~i);
+}
+
 __attr __fn_native__int_or(__attr __args[])
 {
     __attr * const _data = &__args[1];
diff -r 95b8056f3a79 -r fc291b59f67b templates/native.h
--- a/templates/native.h	Sat Dec 03 16:44:55 2016 +0100
+++ b/templates/native.h	Sat Dec 03 17:11:59 2016 +0100
@@ -19,6 +19,7 @@
 __attr __fn_native__int_sub(__attr __args[]);
 
 __attr __fn_native__int_and(__attr __args[]);
+__attr __fn_native__int_not(__attr __args[]);
 __attr __fn_native__int_or(__attr __args[]);
 __attr __fn_native__int_xor(__attr __args[]);
 
diff -r 95b8056f3a79 -r fc291b59f67b tests/numbers.py
--- a/tests/numbers.py	Sat Dec 03 16:44:55 2016 +0100
+++ b/tests/numbers.py	Sat Dec 03 17:11:59 2016 +0100
@@ -1,19 +1,28 @@
 i = 2 ** 30
-print i
+print i                                 # 1073741824
 
 j = -2 ** 30
-print j
+print j                                 # -1073741824
 
-print i + j
+print i + j                             # 0
 
 try:
     print i - j
 except OverflowError:
     print "i - j: overflow occurred"
 
-print i / j
+print i / i                             # 1
+print i / j                             # -1
+print j / j                             # 1
+print j / i                             # -1
 
 try:
     print i * j
 except OverflowError:
     print "i * j: overflow occurred"
+
+print i - i                             # 0
+print j - j                             # 0
+print ~j                                # 1073741823
+print i & ~j                            # 0
+print i - 1 & ~j                        # 1073741823