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) {
+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) {

src/gtest.cc

@@ -4349,7 +4349,7 @@ bool ShouldShard(const char* total_shards_env,
 // Parses the environment variable var as an Int32. If it is unset,
 // returns default_val. If it is not an Int32, prints an error
 // and aborts.
-Int32 Int32FromEnvOrDie(const char* const var, Int32 default_val) {
+Int32 Int32FromEnvOrDie(const char* var, Int32 default_val) {
   const char* str_val = posix::GetEnv(var);
   if (str_val == NULL) {
     return default_val;

test/gtest_unittest.cc

@@ -1416,8 +1416,8 @@ static int global_var = 0;
 #define GTEST_USE_UNPROTECTED_COMMA_ global_var++, global_var++
 
 TEST_F(ExpectFatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-#if !defined(__BORLANDC__) || __BORLANDC__ >= 0x600
-  // ICE's in C++Builder 2007.
+#ifndef __BORLANDC__
+  // ICE's in C++Builder.
   EXPECT_FATAL_FAILURE({
     GTEST_USE_UNPROTECTED_COMMA_;
     AddFatalFailure();
@@ -3550,8 +3550,8 @@ TEST(AssertionTest, ASSERT_TRUE) {
 // Tests ASSERT_TRUE(predicate) for predicates returning AssertionResult.
 TEST(AssertionTest, AssertTrueWithAssertionResult) {
   ASSERT_TRUE(ResultIsEven(2));
-#if !defined(__BORLANDC__) || __BORLANDC__ >= 0x600
-  // ICE's in C++Builder 2007.
+#ifndef __BORLANDC__
+  // ICE's in C++Builder.
   EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEven(3)),
                        "Value of: ResultIsEven(3)\n"
                        "  Actual: false (3 is odd)\n"
@@ -3576,8 +3576,8 @@ TEST(AssertionTest, ASSERT_FALSE) {
 // Tests ASSERT_FALSE(predicate) for predicates returning AssertionResult.
 TEST(AssertionTest, AssertFalseWithAssertionResult) {
   ASSERT_FALSE(ResultIsEven(3));
-#if !defined(__BORLANDC__) || __BORLANDC__ >= 0x600
-  // ICE's in C++Builder 2007.
+#ifndef __BORLANDC__
+  // ICE's in C++Builder.
   EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEven(2)),
                        "Value of: ResultIsEven(2)\n"
                        "  Actual: true (2 is even)\n"
@@ -3877,10 +3877,16 @@ TEST(AssertionTest, AnonymousEnum) {
   ASSERT_LE(kCaseA, kCaseB);
   ASSERT_GT(kCaseB, kCaseA);
   ASSERT_GE(kCaseA, kCaseA);
+
+# ifndef __BORLANDC__
+
+  // ICE's in C++Builder.
   EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseB),
                        "Value of: kCaseB");
   EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
                        "Actual: 42");
+# endif
+
   EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
                        "Which is: -1");
 }
@@ -4791,10 +4797,13 @@ TEST(ComparisonAssertionTest, AcceptsUnprintableArgs) {
 
   // Code tested by EXPECT_FATAL_FAILURE cannot reference local
   // variables, so we have to write UnprintableChar('x') instead of x.
+#ifndef __BORLANDC__
+  // ICE's in C++Builder.
   EXPECT_FATAL_FAILURE(ASSERT_NE(UnprintableChar('x'), UnprintableChar('x')),
                        "1-byte object <78>");
   EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
                        "1-byte object <78>");
+#endif
   EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
                        "1-byte object <79>");
   EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
@@ -7213,8 +7222,10 @@ TEST(CopyArrayTest, WorksForDegeneratedArrays) {
 TEST(CopyArrayTest, WorksForOneDimensionalArrays) {
   const char a[3] = "hi";
   int b[3];
+#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
   CopyArray(a, &b);
   EXPECT_TRUE(ArrayEq(a, b));
+#endif
 
   int c[3];
   CopyArray(a, 3, c);
@@ -7224,8 +7235,10 @@ TEST(CopyArrayTest, WorksForOneDimensionalArrays) {
 TEST(CopyArrayTest, WorksForTwoDimensionalArrays) {
   const int a[2][3] = { { 0, 1, 2 }, { 3, 4, 5 } };
   int b[2][3];
+#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
   CopyArray(a, &b);
   EXPECT_TRUE(ArrayEq(a, b));
+#endif
 
   int c[2][3];
   CopyArray(a, 2, c);