replace autogenerated TemplatesX classes by variadic ones

googletest/include/gtest/gtest-typed-test.h

@@ -286,7 +286,7 @@ INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
 
 #define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                         \
   namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                             \
-    typedef ::testing::internal::Templates<__VA_ARGS__>::type gtest_AllTests_; \
+    typedef ::testing::internal::Templates<__VA_ARGS__> gtest_AllTests_;    \
   }                                                                         \
   static const char* const GTEST_REGISTERED_TEST_NAMES_(                    \
       SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                  \

googletest/include/gtest/internal/gtest-internal.h

@@ -781,7 +781,7 @@ class TypeParameterizedTestSuite {
 
 // The base case for the compile time recursion.
 template <GTEST_TEMPLATE_ Fixture, typename Types>
-class TypeParameterizedTestSuite<Fixture, Templates0, Types> {
+class TypeParameterizedTestSuite<Fixture, internal::None, Types> {
  public:
   static bool Register(const char* /*prefix*/, const CodeLocation&,
                        const TypedTestSuitePState* /*state*/,

googletest/include/gtest/internal/gtest-type-util.h.pump

@@ -32,11 +32,6 @@ $var n = 50  $$ Maximum length of type lists we want to support.
 
 // Type utilities needed for implementing typed and type-parameterized
 // tests.  This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// Currently we support at most $n type-parameterized tests
-// in one type-parameterized test suite.
-// Please contact googletestframework@googlegroups.com if you need
-// more.
 
 // GOOGLETEST_CM0001 DO NOT DELETE
 
@@ -104,6 +99,9 @@ std::string GetTypeName() {
 
 #if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
 
+// A unique type indicating an empty node
+struct None {};
+
 # define GTEST_TEMPLATE_ template <typename T> class
 
 // The template "selector" struct TemplateSel<Tmpl> is used to
@@ -125,84 +123,18 @@ struct TemplateSel {
 # define GTEST_BIND_(TmplSel, T) \
   TmplSel::template Bind<T>::type
 
-// A unique struct template used as the default value for the
-// arguments of class template Templates.  This allows us to simulate
-// variadic templates (e.g. Templates<int>, Templates<int, double>,
-// and etc), which C++ doesn't support directly.
-template <typename T>
-struct NoneT {};
-
-// The following family of struct and struct templates are used to
-// represent template lists.  In particular, TemplatesN<T1, T2, ...,
-// TN> represents a list of N templates (T1, T2, ..., and TN).  Except
-// for Templates0, every struct in the family has two member types:
-// Head for the selector of the first template in the list, and Tail
-// for the rest of the list.
-
-// The empty template list.
-struct Templates0 {};
-
-// Template lists of length 1, 2, 3, and so on.
-
-template <GTEST_TEMPLATE_ T1>
-struct Templates1 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates0 Tail;
-};
-
-$range i 2..n
-
-$for i [[
-$range j 1..i
-$range k 2..i
-template <$for j, [[GTEST_TEMPLATE_ T$j]]>
-struct Templates$i {
-  typedef TemplateSel<T1> Head;
-  typedef Templates$(i-1)<$for k, [[T$k]]> Tail;
-};
-
-
-]]
-
-// We don't want to require the users to write TemplatesN<...> directly,
-// as that would require them to count the length.  Templates<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Templates<list>
-// will appear as Templates<list, NoneT, NoneT, ..., NoneT> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Templates<T1, ..., TN>, and Google Test will translate
-// that to TemplatesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Templates template.
-
-$range i 1..n
-template <$for i, [[GTEST_TEMPLATE_ T$i = NoneT]]>
+template <GTEST_TEMPLATE_ Head_, GTEST_TEMPLATE_... Tail_>
 struct Templates {
-  typedef Templates$n<$for i, [[T$i]]> type;
+  using Head = TemplateSel<Head_>;
+  using Tail = Templates<Tail_...>;
 };
 
-template <>
-struct Templates<$for i, [[NoneT]]> {
-  typedef Templates0 type;
+template <GTEST_TEMPLATE_ Head_>
+struct Templates<Head_> {
+  typedef TemplateSel<Head_> Head;
+  typedef None Tail;
 };
 
-$range i 1..n-1
-$for i [[
-$range j 1..i
-$range k i+1..n
-template <$for j, [[GTEST_TEMPLATE_ T$j]]>
-struct Templates<$for j, [[T$j]]$for k[[, NoneT]]> {
-  typedef Templates$i<$for j, [[T$j]]> type;
-};
-
-]]
-
-// A unique type indicating an empty node
-struct None {};
-
 // Tuple-like type lists
 template <typename Head_, typename... Tail_>
 struct Types {