allow fixed size C array declarations in pure mode

--HG--
extra : amend_source : 49ba7a5625c69a46f550f471dfbd462a5082b27c

Cython/Shadow.py

@@ -34,8 +34,6 @@ def index_type(base_type, item):
     a 2D strided array of doubles. The syntax is the same as for
     Cython memoryviews.
     """
-    assert isinstance(item, (tuple, slice))
-
     class InvalidTypeSpecification(Exception):
         pass
 
@@ -60,9 +58,13 @@ def index_type(base_type, item):
         return _ArrayType(base_type, len(item),
                           is_c_contig=step_idx == len(item) - 1,
                           is_f_contig=step_idx == 0)
-    else:
+    elif isinstance(item, slice):
         verify_slice(item)
         return _ArrayType(base_type, 1, is_c_contig=bool(item.step))
+    else:
+        # int[8] etc.
+        assert int(item) == item and not isinstance(item, float)  # array size must be a plain integer
+        array(base_type, item)
 
 # END shameless copy
 

tests/run/pure_py.py

@@ -221,3 +221,19 @@ def cdef_inline(x):
 def call_cdef_inline(x):
     ret = cdef_inline(x)
     return ret, cython.typeof(ret)
+
+
+@cython.locals(counts=cython.int[10], digit=cython.int)
+def count_digits_in_carray(digits):
+    """
+    >>> digits = '37692837651902834128342341'
+    >>> ''.join(sorted(digits))
+    '01112222333334445667788899'
+    >>> count_digits_in_carray(map(int, digits))
+    [1, 3, 4, 5, 3, 1, 2, 2, 3, 2]
+    """
+    counts = [0] * 10
+    for digit in digits:
+        assert 0 <= digit <= 9
+        counts[digit] += 1
+    return counts