Googletest export
Print unique_ptr/shared_ptr recursively.
Given that they are smart pointers, it is unlikely that the inner object is
invalid.
PiperOrigin-RevId: 351586888
diff --git a/googletest/include/gtest/gtest-printers.h b/googletest/include/gtest/gtest-printers.h
index 1f72b78..37e949b 100644
--- a/googletest/include/gtest/gtest-printers.h
+++ b/googletest/include/gtest/gtest-printers.h
@@ -101,6 +101,7 @@
#define GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
#include <functional>
+#include <memory>
#include <ostream> // NOLINT
#include <sstream>
#include <string>
@@ -108,6 +109,7 @@
#include <type_traits>
#include <utility>
#include <vector>
+
#include "gtest/internal/gtest-internal.h"
#include "gtest/internal/gtest-port.h"
@@ -573,6 +575,43 @@
UniversalPrinter<T&>::Print(ref.get(), os);
}
+inline const void* VoidifyPointer(const void* p) { return p; }
+inline const void* VoidifyPointer(volatile const void* p) {
+ return const_cast<const void*>(p);
+}
+
+template <typename T, typename Ptr>
+void PrintSmartPointer(const Ptr& ptr, std::ostream* os, char) {
+ if (ptr == nullptr) {
+ *os << "(nullptr)";
+ } else {
+ // We can't print the value. Just print the pointer..
+ *os << "(" << (VoidifyPointer)(ptr.get()) << ")";
+ }
+}
+template <typename T, typename Ptr,
+ typename = typename std::enable_if<!std::is_void<T>::value &&
+ !std::is_array<T>::value>::type>
+void PrintSmartPointer(const Ptr& ptr, std::ostream* os, int) {
+ if (ptr == nullptr) {
+ *os << "(nullptr)";
+ } else {
+ *os << "(ptr = " << (VoidifyPointer)(ptr.get()) << ", value = ";
+ UniversalPrinter<T>::Print(*ptr, os);
+ *os << ")";
+ }
+}
+
+template <typename T, typename D>
+void PrintTo(const std::unique_ptr<T, D>& ptr, std::ostream* os) {
+ (PrintSmartPointer<T>)(ptr, os, 0);
+}
+
+template <typename T>
+void PrintTo(const std::shared_ptr<T>& ptr, std::ostream* os) {
+ (PrintSmartPointer<T>)(ptr, os, 0);
+}
+
// Helper function for printing a tuple. T must be instantiated with
// a tuple type.
template <typename T>
diff --git a/googletest/test/googletest-printers-test.cc b/googletest/test/googletest-printers-test.cc
index 24ec230..0653d9e 100644
--- a/googletest/test/googletest-printers-test.cc
+++ b/googletest/test/googletest-printers-test.cc
@@ -32,15 +32,16 @@
//
// This file tests the universal value printer.
-#include <ctype.h>
-#include <string.h>
#include <algorithm>
+#include <cctype>
#include <cstdint>
+#include <cstring>
#include <deque>
#include <forward_list>
#include <limits>
#include <list>
#include <map>
+#include <memory>
#include <set>
#include <sstream>
#include <string>
@@ -1702,6 +1703,56 @@
PrintToString(reinterpret_cast<Incomplete&>(some_object)));
}
+TEST(UniversalPrintTest, SmartPointers) {
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<int>()));
+ std::unique_ptr<int> p(new int(17));
+ EXPECT_EQ("(ptr = " + PrintPointer(p.get()) + ", value = 17)",
+ PrintToString(p));
+ std::unique_ptr<int[]> p2(new int[2]);
+ EXPECT_EQ("(" + PrintPointer(p2.get()) + ")", PrintToString(p2));
+
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<int>()));
+ std::shared_ptr<int> p3(new int(1979));
+ EXPECT_EQ("(ptr = " + PrintPointer(p3.get()) + ", value = 1979)",
+ PrintToString(p3));
+#if __cpp_lib_shared_ptr_arrays >= 201611L
+ std::shared_ptr<int[]> p4(new int[2]);
+ EXPECT_EQ("(" + PrintPointer(p4.get()) + ")", PrintToString(p4));
+#endif
+
+ // modifiers
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<const int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<volatile int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<volatile const int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<int[]>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<const int[]>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<volatile int[]>()));
+ EXPECT_EQ("(nullptr)",
+ PrintToString(std::unique_ptr<volatile const int[]>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<const int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<volatile int>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<volatile const int>()));
+#if __cpp_lib_shared_ptr_arrays >= 201611L
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<int[]>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<const int[]>()));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<volatile int[]>()));
+ EXPECT_EQ("(nullptr)",
+ PrintToString(std::shared_ptr<volatile const int[]>()));
+#endif
+
+ // void
+ EXPECT_EQ("(nullptr)", PrintToString(std::unique_ptr<void, void (*)(void*)>(
+ nullptr, nullptr)));
+ EXPECT_EQ("(" + PrintPointer(p.get()) + ")",
+ PrintToString(
+ std::unique_ptr<void, void (*)(void*)>(p.get(), [](void*) {})));
+ EXPECT_EQ("(nullptr)", PrintToString(std::shared_ptr<void>()));
+ EXPECT_EQ("(" + PrintPointer(p.get()) + ")",
+ PrintToString(std::shared_ptr<void>(p.get(), [](void*) {})));
+}
+
TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsEmptyTuple) {
Strings result = UniversalTersePrintTupleFieldsToStrings(::std::make_tuple());
EXPECT_EQ(0u, result.size());
