Fix fused signature delimiter and ndim dispatch

Cython/Compiler/FusedNode.py

@@ -211,7 +211,7 @@ class FusedCFuncDefNode(StatListNode):
                 for fused_type in fused_types
         ]
 
-        node.specialized_signature_string = ', '.join(type_strings)
+        node.specialized_signature_string = '|'.join(type_strings)
 
         node.entry.pymethdef_cname = PyrexTypes.get_fused_cname(
                                         cname, node.entry.pymethdef_cname)
@@ -322,7 +322,8 @@ class FusedCFuncDefNode(StatListNode):
 
             for dtype_category, codewriter in dtypes:
                 if dtype_category:
-                    cond = '{{itemsize_match}}'
+                    cond = '{{itemsize_match}} and arg.ndim == %d' % (
+                                                    specialized_type.ndim,)
                     if dtype.is_int:
                         cond += ' and {{signed_match}}'
 
@@ -587,7 +588,7 @@ class FusedCFuncDefNode(StatListNode):
                 candidates = []
                 for sig in signatures:
                     match_found = False
-                    for src_type, dst_type in zip(sig.strip('()').split(', '), dest_sig):
+                    for src_type, dst_type in zip(sig.strip('()').split('|'), dest_sig):
                         if dst_type is not None:
                             if src_type == dst_type:
                                 match_found = True

tests/run/numpy_test.pyx

@@ -849,4 +849,21 @@ def test_dispatch_memoryview_object():
     cdef int[:] m3 = <object> m
     test_fused_memslice(m3)
 
+cdef fused ndim_t:
+    double[:]
+    double[:, :]
+    double[:, :, :]
+
+@testcase
+def test_dispatch_ndim(ndim_t array):
+    """
+    >>> test_dispatch_ndim(np.empty(5, dtype=np.double))
+    double[:] 1
+    >>> test_dispatch_ndim(np.empty((5, 5), dtype=np.double))
+    double[:, :] 2
+    >>> test_dispatch_ndim(np.empty((5, 5, 5), dtype=np.double))
+    double[:, :, :] 3
+    """
+    print cython.typeof(array), np.asarray(array).ndim
+
 include "numpy_common.pxi"