Start integrating new machinery for checking code completeness

IPython/core/interactiveshell.py

@@ -334,15 +334,18 b' class InteractiveShell(SingletonConfigurable):'
     filename = Unicode("<ipython console>")
     ipython_dir= Unicode('').tag(config=True) # Set to get_ipython_dir() in __init__
 
-    # Input splitter, to transform input line by line and detect when a block
-    # is ready to be executed.
-    input_splitter = Instance('IPython.core.inputsplitter.IPythonInputSplitter',
-                              (), {'line_input_checker': True})
-
-    # Used to transform cells before running them.
+    # Used to transform cells before running them, and check whether code is complete
     input_transformer_manager = Instance('IPython.core.inputtransformer2.TransformerManager',
                                          ())
 
+    @property
+    def input_splitter(self):
+        """Make this available for compatibility
+
+        ipykernel currently uses shell.input_splitter.check_complete
+        """
+        return self.input_transformer_manager
+
     logstart = Bool(False, help=
         """
         Start logging to the default log file in overwrite mode.

IPython/core/tests/test_inputtransformer2.py

@@ -179,10 +179,11 b' def test_transform_help():'
     nt.assert_equal(tf.transform(HELP_MULTILINE[0]), HELP_MULTILINE[2])
 
 def test_check_complete():
-    tm = ipt2.TransformerManager()
-    nt.assert_equal(tm.check_complete("a = 1"), ('complete', None))
-    nt.assert_equal(tm.check_complete("for a in range(5):"), ('incomplete', 4))
-    nt.assert_equal(tm.check_complete("raise = 2"), ('invalid', None))
-    nt.assert_equal(tm.check_complete("a = [1,\n2,"), ('incomplete', 0))
-    nt.assert_equal(tm.check_complete("a = '''\n   hi"), ('incomplete', 3))
-    nt.assert_equal(tm.check_complete("def a():\n x=1\n global x"), ('invalid', None))
+    cc = ipt2.TransformerManager().check_complete
+    nt.assert_equal(cc("a = 1"), ('complete', None))
+    nt.assert_equal(cc("for a in range(5):"), ('incomplete', 4))
+    nt.assert_equal(cc("raise = 2"), ('invalid', None))
+    nt.assert_equal(cc("a = [1,\n2,"), ('incomplete', 0))
+    nt.assert_equal(cc("a = '''\n   hi"), ('incomplete', 3))
+    nt.assert_equal(cc("def a():\n x=1\n global x"), ('invalid', None))
+    nt.assert_equal(cc("a \\ "), ('invalid', None))  # Nothing allowed after backslash