Add C++11 alias templates

Examples/test-suite/cpp11_template_typedefs.i

@@ -1,56 +1,86 @@
-/* This testcase checks whether SWIG correctly parses alias templates. */
+/* This testcase checks whether SWIG correctly handles alias templates. */
 %module cpp11_template_typedefs
 
-%warnfilter(SWIGWARN_CPP11_ALIAS_TEMPLATE) TypedefName;
-%warnfilter(SWIGWARN_CPP11_ALIAS_TEMPLATE) TypedefNamePtr;
-%warnfilter(SWIGWARN_CPP11_ALIAS_TEMPLATE) MyIntKeyClass;
-%warnfilter(SWIGWARN_CPP11_ALIAS_DECLARATION) PF;
-%warnfilter(SWIGWARN_CPP11_ALIAS_DECLARATION) BucketAllocator1;
-%warnfilter(SWIGWARN_CPP11_ALIAS_DECLARATION) BucketAllocator2;
-
-// This warning should go away when type aliasing is supported
-#pragma SWIG nowarn=SWIGWARN_PARSE_USING_UNDEF // Nothing known about 'p.SomeType< char *,T2,4 >'.
-
 %inline %{
-template< typename T1, typename T2, int >
+
+template<typename T>
+using ptr_t = T*;
+
+namespace ns {
+
+template<typename T1, typename T2, int N>
 class SomeType {
+public:
+  using type1_t = T1;
+  using type2_t = T2;
   T1 a;
   T2 b;
-  int c;
+  constexpr int get_n() { return N; }
 };
 
-// template aliasing
-template< typename T2 >
-using TypedefName = SomeType<char*, T2, 5>;
-template< typename T2 >
-using TypedefNamePtr = SomeType<char*, T2, 4>*;
-
-// type aliasing
-typedef void (*PFD)(double);            // Old style
-using PF = void (*)(double);            // New introduced syntax
-
-
-// use of template aliasing
-template<typename Key,typename Val>
-class MyCPP11Class {
+// Specialization for T1=const char*, T2=bool
+template<int N>
+class SomeType<const char*, bool, N> {
+public:
+  using type1_t = const char*;
+  using type2_t = bool;
+  type1_t a;
+  type2_t b;
+  constexpr int get_n() { return 3 * N; }
 };
-template<typename VAL> using MyIntKeyClass = MyCPP11Class<int,VAL>;
-MyIntKeyClass<char> intchar;
 
-TypedefName<int> alias1(TypedefName<int> a) { return a; }
-TypedefNamePtr<int> alias1(TypedefNamePtr<int> a = nullptr) { return a; }
-%}
+// alias templates
+template<typename T2>
+using TypedefName = SomeType<const char*, T2, 5>;
+template<typename T2>
+using TypedefNamePtr = ptr_t<SomeType<const char*, T2, 4>>;
+
+// alias template that returns T2 for a SomeType<T1,T2,N> class
+template<typename T>
+using T2_of = typename T::type2_t;
+
+T2_of<TypedefName<int>> get_SomeType_b(const SomeType<const char*, int, 5>& x) { return x.b; }
+
+template<typename T>
+T2_of<TypedefName<T>> get_SomeType_b2(const TypedefName<T>& x) { return x.b; }
+
+} // namespace ns
+
+ns::TypedefName<int> create_TypedefName() { return { "hello", 10}; }
+ns::TypedefName<bool> create_TypedefNameBool() { return { "hello", true}; }
+ns::TypedefNamePtr<int> identity(ns::TypedefNamePtr<int> a = nullptr) { return a; }
 
-%inline %{
 typedef double Val;
 template<typename T> struct ListBucket {
 };
 namespace Alloc {
   template<typename T> struct rebind {
-    typedef int other;
+    using other = int;
   };
 }
 
 using BucketAllocator1 = typename Alloc::template rebind<ListBucket<Val>>::other;
 using BucketAllocator2 = typename Alloc::template rebind<::template ListBucket<double>>::other;
+
+BucketAllocator1 get_bucket_allocator1() { return 1; }
+BucketAllocator2 get_bucket_allocator2() { return 2; }
 %}
+
+%immutable ns::SomeType::a;
+
+// %template() directives
+
+%template(SomeTypeInt5) ns::SomeType<const char*, int, 5>;
+%template(SomeTypeInt4) ns::SomeType<const char*, int, 4>;
+%template(SomeTypeBool5) ns::SomeType<const char*, bool, 5>;
+
+%template(ListBucketDouble) ListBucket<Val>;
+%template(RebindListBucketDouble) Alloc::rebind<ListBucket<Val>>;
+
+%template() ptr_t<ns::SomeType<const char*, int, 4>>;
+%template() ns::TypedefName<int>;
+%template() ns::TypedefName<bool>;
+%template() ns::TypedefNamePtr<int>;
+%template() ns::T2_of<ns::TypedefName<int>>;
+
+%template(get_SomeType_b2) ns::get_SomeType_b2<int>;

Examples/test-suite/python/cpp11_template_typedefs_runme.py

@@ -0,0 +1,43 @@
+from cpp11_template_typedefs import *
+
+t = create_TypedefName()
+if type(t).__name__ != "SomeTypeInt5":
+    raise RuntimeError("type(t) is '%s' and should be 'SomeTypeInt5'" % type(t).__name__)
+
+if t.a != "hello":
+    raise RuntimeError("t.a should be 'hello'")
+if t.b != 10:
+    raise RuntimeError("t.b should be 10")
+if t.get_n() != 5:
+    raise RuntimeError("t.get_n() should be 5")
+
+t_bool = create_TypedefNameBool()
+if type(t_bool).__name__ != "SomeTypeBool5":
+    raise RuntimeError("type(t_bool) is '%s' and should be 'SomeTypeBool5'" % type(t_bool).__name__)
+
+if t_bool.a != "hello":
+    raise RuntimeError("t_bool.a should be 'hello'")
+if t_bool.b != True:
+    raise RuntimeError("t_bool.b should be True")
+if t_bool.get_n() != 15:
+    raise RuntimeError("t_bool.get_n() should be 15")
+
+if get_SomeType_b(t) != 10:
+    raise RuntimeError("get_SomeType_b(t) should be 10")
+
+if get_SomeType_b2(t) != 10:
+    raise RuntimeError("get_SomeType_b2(t) should be 10")
+
+t2 = SomeTypeInt4()
+t2.b = 0
+t3 = identity(t2)
+t3.b = 5
+if t2.b != 5:
+    raise RuntimeError("t2.b should be 5")
+
+if get_bucket_allocator1() != 1:
+    raise RuntimeError("bucket_allocator1 should be 1")
+
+# SWIG doesn't handle ::MyClass as a template argument. Skip this test.
+#if get_bucket_allocator2() != 2:
+#    raise RuntimeError("bucket_allocator2 should be 2")