Rename remaining wrap methods to cast.

Following commit d72d4a55.

nmigen/test/test_hdl_rec.py

@@ -13,7 +13,7 @@ class UnsignedEnum(Enum):
 
 class LayoutTestCase(FHDLTestCase):
     def test_fields(self):
-        layout = Layout.wrap([
+        layout = Layout.cast([
             ("cyc",  1),
             ("data", signed(32)),
             ("stb",  1, DIR_FANOUT),
@@ -34,7 +34,7 @@ class LayoutTestCase(FHDLTestCase):
         self.assertEqual(sublayout["b"], ((1, False), DIR_NONE))
 
     def test_enum_field(self):
-        layout = Layout.wrap([
+        layout = Layout.cast([
             ("enum", UnsignedEnum),
             ("enum_dir", UnsignedEnum, DIR_FANOUT),
         ])
@@ -42,18 +42,18 @@ class LayoutTestCase(FHDLTestCase):
         self.assertEqual(layout["enum_dir"], ((2, False), DIR_FANOUT))
 
     def test_range_field(self):
-        layout = Layout.wrap([
+        layout = Layout.cast([
             ("range", range(0, 7)),
         ])
         self.assertEqual(layout["range"], ((3, False), DIR_NONE))
 
     def test_slice_tuple(self):
-        layout = Layout.wrap([
+        layout = Layout.cast([
             ("a", 1),
             ("b", 2),
             ("c", 3)
         ])
-        expect = Layout.wrap([
+        expect = Layout.cast([
             ("a", 1),
             ("c", 3)
         ])
@@ -63,29 +63,29 @@ class LayoutTestCase(FHDLTestCase):
         with self.assertRaises(TypeError,
                 msg="Field (1,) has invalid layout: should be either (name, shape) or "
                     "(name, shape, direction)"):
-            Layout.wrap([(1,)])
+            Layout.cast([(1,)])
 
     def test_wrong_name(self):
         with self.assertRaises(TypeError,
                 msg="Field (1, 1) has invalid name: should be a string"):
-            Layout.wrap([(1, 1)])
+            Layout.cast([(1, 1)])
 
     def test_wrong_name_duplicate(self):
         with self.assertRaises(NameError,
                 msg="Field ('a', 2) has a name that is already present in the layout"):
-            Layout.wrap([("a", 1), ("a", 2)])
+            Layout.cast([("a", 1), ("a", 2)])
 
     def test_wrong_direction(self):
         with self.assertRaises(TypeError,
                 msg="Field ('a', 1, 0) has invalid direction: should be a Direction "
                     "instance like DIR_FANIN"):
-            Layout.wrap([("a", 1, 0)])
+            Layout.cast([("a", 1, 0)])
 
     def test_wrong_shape(self):
         with self.assertRaises(TypeError,
                 msg="Field ('a', 'x') has invalid shape: should be castable to Shape or "
                     "a list of fields of a nested record"):
-            Layout.wrap([("a", "x")])
+            Layout.cast([("a", "x")])
 
 
 class RecordTestCase(FHDLTestCase):

nmigen/test/test_sim.py

@@ -22,7 +22,7 @@ class SimulatorUnitTestCase(FHDLTestCase):
         stmt = stmt(osig, *isigs)
         frag = Fragment()
         frag.add_statements(stmt)
-        for signal in flatten(s._lhs_signals() for s in Statement.wrap(stmt)):
+        for signal in flatten(s._lhs_signals() for s in Statement.cast(stmt)):
             frag.add_driver(signal)
 
         with Simulator(frag,

nmigen/test/tools.py

@@ -20,7 +20,7 @@ __all__ = ["FHDLTestCase"]
 class FHDLTestCase(unittest.TestCase):
     def assertRepr(self, obj, repr_str):
         if isinstance(obj, list):
-            obj = Statement.wrap(obj)
+            obj = Statement.cast(obj)
         def prepare_repr(repr_str):
             repr_str = re.sub(r"\s+",   " ",  repr_str)
             repr_str = re.sub(r"\( (?=\()", "(", repr_str)