array size could be expressions with known C compile-time values

Cython/Compiler/PyrexTypes.py

@@ -616,7 +616,6 @@ class CArrayType(CType):
     is_array = 1
     
     def __init__(self, base_type, size):
-        assert size is None or isinstance(size, int), repr(size)
         self.base_type = base_type
         self.size = size
         if base_type is c_char_type:

tests/run/carrays.pyx

 __doc__ = """
->>> test()
+>>> test1()
 2
+>>> test2()
+0
+>>> test3()
+(2, 3)
 """
 
-def test():
+def test1():
     cdef int x[2][2]
     x[0][0] = 1
     x[0][1] = 2
@@ -13,3 +17,18 @@ def test():
 
 cdef int* f(int x[2][2]):
     return x[0]
+
+
+def test2():
+    cdef int a1[5]
+    cdef int a2[2+3]
+    return sizeof(a1) - sizeof(a2)
+
+cdef enum:
+    MY_SIZE_A = 2
+    MY_SIZE_B = 3
+
+def test3():
+    cdef int a[MY_SIZE_A]
+    cdef int b[MY_SIZE_B]
+    return sizeof(a)/sizeof(int), sizeof(b)/sizeof(int)