undo code removal - not entirely clear what to make of it

Cython/Shadow.py

 # cython.* namespace for pure mode.
 __version__ = "0.18b1"
 
+# Shamelessly copied from Cython/minivect/minitypes.py
+
+class _ArrayType(object):
+
+    is_array = True
+    subtypes = ['dtype']
+
+    def __init__(self, dtype, ndim, is_c_contig=False, is_f_contig=False,
+                 inner_contig=False, broadcasting=None):
+        self.dtype = dtype
+        self.ndim = ndim
+        self.is_c_contig = is_c_contig
+        self.is_f_contig = is_f_contig
+        self.inner_contig = inner_contig or is_c_contig or is_f_contig
+        self.broadcasting = broadcasting
+
+    def __repr__(self):
+        axes = [":"] * self.ndim
+        if self.is_c_contig:
+            axes[-1] = "::1"
+        elif self.is_f_contig:
+            axes[0] = "::1"
+
+        return "%s[%s]" % (self.dtype, ", ".join(axes))
+
+def index_type(base_type, item):
+    """
+    Support array type creation by slicing, e.g. double[:, :] specifies
+    a 2D strided array of doubles. The syntax is the same as for
+    Cython memoryviews.
+    """
+    assert isinstance(item, (tuple, slice))
+
+    def verify_slice(s):
+        if s.start or s.stop or s.step not in (None, 1):
+            raise minierror.InvalidTypeSpecification(
+                "Only a step of 1 may be provided to indicate C or "
+                "Fortran contiguity")
+
+    if isinstance(item, tuple):
+        step_idx = None
+        for idx, s in enumerate(item):
+            verify_slice(s)
+            if s.step and (step_idx or idx not in (0, len(item) - 1)):
+                raise minierror.InvalidTypeSpecification(
+                    "Step may only be provided once, and only in the "
+                    "first or last dimension.")
+
+            if s.step == 1:
+                step_idx = idx
+
+        return _ArrayType(base_type, len(item),
+                          is_c_contig=step_idx == len(item) - 1,
+                          is_f_contig=step_idx == 0)
+    else:
+        verify_slice(item)
+        return _ArrayType(base_type, 1, is_c_contig=bool(item.step))
+
+# END shameless copy
+
 compiled = False
 
 _Unspecified = object()