add binary shift operations to `AtomicNumber`

CHANGELOG.md

 # v2.9.7
 
+* add binary shift operations to `AtomicNumber`
+
 

satella/__init__.py

-__version__ = '2.9.7_a1'
+__version__ = '2.9.7_a2'

satella/coding/concurrent/atomic.py

@@ -99,6 +99,32 @@ class AtomicNumber(Monitor):
     def __gt__(self, other: Number):
         return self.value > other
 
+    @Monitor.synchronized
+    def __lshift__(self, other: int) -> Number:
+        return self.value << other
+
+    @Monitor.synchronized
+    def __rshift__(self, other: int) -> Number:
+        return self.value >> other
+
+    @Monitor.synchronized
+    def __rlshift__(self, other: int) -> Number:
+        return other << self.value
+
+    @Monitor.synchronized
+    def __rrshift__(self, other: int) -> Number:
+        return other >> self.value
+
+    @Monitor.synchronized
+    def __ilshift__(self, other: int) -> 'AtomicNumber':
+        self.value <<= other
+        return self
+
+    @Monitor.synchronized
+    def __irshift__(self, other: int) -> 'AtomicNumber':
+        self.value >>= other
+        return self
+
     @Monitor.synchronized
     def __ge__(self, other: Number):
         return self.value >= other

tests/test_coding/test_concurrent.py

@@ -45,6 +45,11 @@ class TestConcurrent(unittest.TestCase):
         self.assertIsInstance(a, AtomicNumber)
         self.assertEqual(a, 3)
 
+        self.assertEqual(a << 1, 0b110)
+        self.assertEqual(a >> 1, 1)
+        self.assertEqual(1 << a, 0b1000)
+        self.assertEqual(0b111000 >> a, 0b111)
+        self.assertEqual(a >> 1, 1)
         self.assertIsInstance(a + 2, int)
         self.assertEqual(a | 4, 7)
         self.assertEqual(a & 2, 2)
@@ -73,6 +78,10 @@ class TestConcurrent(unittest.TestCase):
         self.assertEqual(a, 3)
         a ^= 0
         self.assertEqual(a, 3)
+        a <<= 1
+        self.assertEqual(a, 0b110)
+        a >>= 1
+        self.assertEqual(a, 3)
         a /= 1
         self.assertEqual(a, 3.0)
         a //= 1