libbinder*: IBinder/IInterface toString impl

Bug: 259162245
Test: N/A
Change-Id: If612cbd323e5d35b87bec5144b7e35358d718be1

1 files changed, 19 insertions, 27 deletions

diff --git a/libs/binder/ndk/include_cpp/android/binder_to_string.h b/libs/binder/ndk/include_cpp/android/binder_to_string.h
index 9b0d222147..b0c7f6d4a9 100644
--- a/libs/binder/ndk/include_cpp/android/binder_to_string.h
+++ b/libs/binder/ndk/include_cpp/android/binder_to_string.h
@@ -139,30 +139,6 @@ class IsIterable {
 };
 
 template <typename _T>
-class ToEmptyString {
-    template <typename _U>
-    static std::enable_if_t<false
-#ifdef HAS_NDK_INTERFACE
-                                    || std::is_base_of_v<::ndk::ICInterface, _U>
-#if __ANDROID_API__ >= 31
-                                    || std::is_same_v<::ndk::AParcelableHolder, _U>
-#endif
-#endif  // HAS_NDK_INTERFACE
-#ifdef HAS_CPP_INTERFACE
-                                    || std::is_base_of_v<IInterface, _U> ||
-                                    std::is_same_v<IBinder, _U>
-#endif
-                            ,
-                            std::true_type>
-    _test(int);
-    template <typename _U>
-    static std::false_type _test(...);
-
-   public:
-    enum { value = decltype(_test<_T>(0))::value };
-};
-
-template <typename _T>
 struct TypeDependentFalse {
     enum { value = false };
 };
@@ -171,9 +147,7 @@ struct TypeDependentFalse {
 
 template <typename _T>
 std::string ToString(const _T& t) {
-    if constexpr (details::ToEmptyString<_T>::value) {
-        return "<unimplemented>";
-    } else if constexpr (std::is_same_v<bool, _T>) {
+    if constexpr (std::is_same_v<bool, _T>) {
         return t ? "true" : "false";
     } else if constexpr (std::is_same_v<char16_t, _T>) {
         // TODO(b/244494451): codecvt is deprecated in C++17 -- suppress the
@@ -193,6 +167,24 @@ std::string ToString(const _T& t) {
         return ss.str();
     } else if constexpr (std::is_same_v<::ndk::ScopedFileDescriptor, _T>) {
         return "fd:" + std::to_string(t.get());
+    } else if constexpr (std::is_base_of_v<::ndk::ICInterface, _T>) {
+        // TODO(b/266248339): this format is to make it easy to handle resolv_integration_test
+        // freezing the output format. We would like to print more info.
+        return "<interface>";
+#if __ANDROID_API__ >= 31
+    } else if constexpr (std::is_same_v<::ndk::AParcelableHolder, _T>) {
+        return "AParcelableHolder";
+#endif
+#endif  // HAS_NDK_INTERFACE
+#ifdef HAS_CPP_INTERFACE
+    } else if constexpr (std::is_base_of_v<IInterface, _T>) {
+        std::stringstream ss;
+        ss << "interface:" << std::hex << &t;
+        return ss.str();
+    } else if constexpr (std::is_same_v<IBinder, _T>) {
+        std::stringstream ss;
+        ss << "binder:" << std::hex << &t;
+        return ss.str();
 #endif
 #ifdef HAS_STRING16
     } else if constexpr (std::is_same_v<String16, _T>) {