Fix conversion of structs in namespaces.

Cython/Compiler/PyrexTypes.py

@@ -3257,8 +3257,10 @@ class CStructOrUnionType(CType):
         self.scope = scope
         self.typedef_flag = typedef_flag
         self.is_struct = kind == 'struct'
-        self.to_py_function = "%s_to_py_%s" % (Naming.convert_func_prefix, self.cname)
-        self.from_py_function = "%s_from_py_%s" % (Naming.convert_func_prefix, self.cname)
+        self.to_py_function = "%s_to_py_%s" % (
+            Naming.convert_func_prefix, self.specialization_name())
+        self.from_py_function = "%s_from_py_%s" % (
+            Naming.convert_func_prefix, self.specialization_name())
         self.exception_check = True
         self._convert_to_py_code = None
         self._convert_from_py_code = None

tests/run/cpp_namespaces.pyx

@@ -3,6 +3,9 @@
 
 cdef extern from "cpp_namespaces_helper.h" namespace "A":
     ctypedef int A_t
+    cdef struct S:
+        double x
+        A_t k
     A_t A_func(A_t first, A_t)
     cdef void f(A_t)
 
@@ -36,3 +39,11 @@ def test_typedef(A_t a):
     3
     """
     return a
+
+def test_convert_struct(S s):
+    """
+    >>> py_value = {'x': 3.5, 'k': 10}
+    >>> test_convert_struct(py_value) == py_value
+    True
+    """
+    return s

tests/run/cpp_namespaces_helper.h

@@ -18,6 +18,11 @@ namespace A {
 
     typedef int A_t;
 
+    struct S {
+        A_t k;
+        double x;
+    };
+
     A_t A_func(A_t first, A_t second) {
         return first + second;
     }