Add default templates to std::unordered_map

Cython/Includes/libcpp/unordered_map.pxd

@@ -1,7 +1,7 @@
 from .utility cimport pair
 
 cdef extern from "<unordered_map>" namespace "std" nogil:
-    cdef cppclass unordered_map[T, U]:
+    cdef cppclass unordered_map[T, U, HASH=*, PRED=*, ALLOCATOR=*]:
         ctypedef T key_type
         ctypedef U mapped_type
         ctypedef pair[const T, U] value_type

tests/run/libcpp_all.pyx

@@ -14,6 +14,7 @@ cimport libcpp.stack
 cimport libcpp.vector
 cimport libcpp.complex
 cimport libcpp.limits
+cimport libcpp.unordered_map
 
 from libcpp.deque  cimport *
 from libcpp.list   cimport *
@@ -25,6 +26,8 @@ from libcpp.stack  cimport *
 from libcpp.vector cimport *
 from libcpp.complex cimport *
 from libcpp.limits cimport *
+from libcpp.unordered_map cimport *
+from libcpp_all_helper cimport *
 
 cdef libcpp.deque.deque[int]   d1 = deque[int]()
 cdef libcpp.list.list[int]     l1 = list[int]()
@@ -118,6 +121,9 @@ assert vec_alloc_int.size() == 10
 cdef libcpp.list.list[int,allocator[int]] list_alloc_int = libcpp.list.list[int,allocator[int]](10,1)
 assert list_alloc_int.size() == 10
 
+cdef libcpp.unordered_map.unordered_map[MyStruct, int, Hasher].iterator start = map_with_specific_hasher.begin()
+assert start == map_with_specific_hasher.end()
+
 ##Something about the default params breaks the auto-conversion...
 def convert_to_vector(I):
     """

tests/run/libcpp_all_helper.h

@@ -0,0 +1,15 @@
+#include <unordered_map>
+
+struct MyStruct {
+    bool operator == (const MyStruct & rhs) const {
+        return true;
+    }
+};
+
+struct Hasher {
+    std::size_t operator()(const MyStruct & val) const {
+        return 0;
+    }
+};
+
+std::unordered_map<MyStruct, int, Hasher> map_with_specific_hasher;

tests/run/libcpp_all_helper.pxd

@@ -0,0 +1,10 @@
+from libcpp.unordered_map cimport unordered_map
+
+cdef extern from "libcpp_all_helper.h":
+    cdef cppclass MyStruct:
+        pass
+
+    cdef cppclass Hasher:
+        pass
+
+    cdef unordered_map[MyStruct, int] map_with_specific_hasher