C++ iterator tests.

Cython/Compiler/ExprNodes.py

@@ -2184,6 +2184,8 @@ class NextNode(AtomicExprNode):
             self.type = iterator_type.base_type
         elif iterator_type.is_cpp_class:
             self.type = iterator_type.scope.lookup("operator*").type.base_type.return_type
+            if self.type.is_reference:
+                self.type = self.type.ref_base_type
         else:
             self.type = py_object_type
         self.is_temp = 1

tests/run/cpp_iterators.pyx

+# tag: cpp
+
+from libcpp.vector cimport vector
+
+def test_vector(py_v):
+    """
+    >>> test_vector([1, 2, 3])
+    [1, 2, 3]
+    """
+    cdef vector[int] v = py_v
+    cdef vector[int] result
+    with nogil:
+        for item in v:
+            result.push_back(item)
+    return result
+
+def test_ptrs():
+    """
+    >>> test_ptrs()
+    [1.0, 2.0, 3.0]
+    """
+    cdef double a = 1
+    cdef double b = 2
+    cdef double c = 3
+    cdef vector[double*] v
+    v.push_back(&a)
+    v.push_back(&b)
+    v.push_back(&c)
+    cdef double* item
+    return [item[0] for item in v]
+        
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