Fixes compatibility with Borland C++Builder. Original patch by Josh

Kelley.  Simplified by Zhanyong Wan.

include/gtest/gtest-printers.h

@@ -308,7 +308,10 @@ void DefaultPrintTo(IsNotContainer /* dummy */,
   } else {
     // C++ doesn't allow casting from a function pointer to any object
     // pointer.
-    if (ImplicitlyConvertible<T*, const void*>::value) {
+    //
+    // IsTrue() silences warnings: "Condition is always true",
+    // "unreachable code".
+    if (IsTrue(ImplicitlyConvertible<T*, const void*>::value)) {
       // T is not a function type.  We just call << to print p,
       // relying on ADL to pick up user-defined << for their pointer
       // types, if any.
@@ -736,12 +739,25 @@ struct TuplePrefixPrinter<0> {
   template <typename Tuple>
   static void TersePrintPrefixToStrings(const Tuple&, Strings*) {}
 };
+// We have to specialize the entire TuplePrefixPrinter<> class
+// template here, even though the definition of
+// TersePrintPrefixToStrings() is the same as the generic version, as
+// Borland C++ doesn't support specializing a method.
 template <>
-template <typename Tuple>
-void TuplePrefixPrinter<1>::PrintPrefixTo(const Tuple& t, ::std::ostream* os) {
-  UniversalPrinter<typename ::std::tr1::tuple_element<0, Tuple>::type>::
-      Print(::std::tr1::get<0>(t), os);
-}
+struct TuplePrefixPrinter<1> {
+  template <typename Tuple>
+  static void PrintPrefixTo(const Tuple& t, ::std::ostream* os) {
+    UniversalPrinter<typename ::std::tr1::tuple_element<0, Tuple>::type>::
+        Print(::std::tr1::get<0>(t), os);
+  }
+
+  template <typename Tuple>
+  static void TersePrintPrefixToStrings(const Tuple& t, Strings* strings) {
+    ::std::stringstream ss;
+    UniversalTersePrint(::std::tr1::get<0>(t), &ss);
+    strings->push_back(ss.str());
+  }
+};
 
 // Helper function for printing a tuple.  T must be instantiated with
 // a tuple type.

include/gtest/gtest.h

@@ -1296,7 +1296,9 @@ namespace internal {
 template <typename T1, typename T2>
 String FormatForComparisonFailureMessage(const T1& value,
                                          const T2& /* other_operand */) {
-  return PrintToString(value);
+  // C++Builder compiles this incorrectly if the namespace isn't explicitly
+  // given.
+  return ::testing::PrintToString(value);
 }
 
 // The helper function for {ASSERT|EXPECT}_EQ.

include/gtest/internal/gtest-internal.h

@@ -873,6 +873,11 @@ class ImplicitlyConvertible {
   static const bool value =
       sizeof(Helper(ImplicitlyConvertible::MakeFrom())) == 1;
 # pragma warning(pop)           // Restores the warning state.
+#elif defined(__BORLANDC__)
+  // C++Builder cannot use member overload resolution during template
+  // instantiation.  The simplest workaround is to use its C++0x type traits
+  // functions (C++Builder 2009 and above only).
+  static const bool value = __is_convertible(From, To);
 #else
   static const bool value =
       sizeof(Helper(ImplicitlyConvertible::MakeFrom())) == 1;

include/gtest/internal/gtest-string.h

@@ -296,7 +296,7 @@ class GTEST_API_ String {
 
  private:
   // Constructs a non-NULL String from the given content.  This
-  // function can only be called when data_ has not been allocated.
+  // function can only be called when c_str_ has not been allocated.
   // ConstructNonNull(NULL, 0) results in an empty string ("").
   // ConstructNonNull(NULL, non_zero) is undefined behavior.
   void ConstructNonNull(const char* buffer, size_t a_length) {