Makes ByRef(x) printable as a reference to x.

include/gmock/gmock-generated-actions.h

@@ -39,6 +39,7 @@
 #define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_ACTIONS_H_
 
 #include <gmock/gmock-actions.h>
+#include <gmock/gmock-printers.h>
 #include <gmock/internal/gmock-port.h>
 
 namespace testing {
@@ -321,6 +322,9 @@ class InvokeMethodAction {
   const MethodPtr method_ptr_;
 };
 
+// TODO(wan@google.com): ReferenceWrapper and ByRef() are neither
+// action-specific nor variadic.  Move them to a better place.
+
 // A ReferenceWrapper<T> object represents a reference to type T,
 // which can be either const or not.  It can be explicitly converted
 // from, and implicitly converted to, a T&.  Unlike a reference,
@@ -341,6 +345,13 @@ class ReferenceWrapper {
   T* pointer_;
 };
 
+// Allows the expression ByRef(x) to be printed as a reference to x.
+template <typename T>
+void PrintTo(const ReferenceWrapper<T>& ref, ::std::ostream* os) {
+  T& value = ref;
+  UniversalPrinter<T&>::Print(value, os);
+}
+
 // CallableHelper has static methods for invoking "callables",
 // i.e. function pointers and functors.  It uses overloading to
 // provide a uniform interface for invoking different kinds of

include/gmock/gmock-generated-actions.h.pump

@@ -43,6 +43,7 @@ $$}} This meta comment fixes auto-indentation in editors.
 #define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_ACTIONS_H_
 
 #include <gmock/gmock-actions.h>
+#include <gmock/gmock-printers.h>
 #include <gmock/internal/gmock-port.h>
 
 namespace testing {
@@ -123,6 +124,9 @@ class InvokeMethodAction {
   const MethodPtr method_ptr_;
 };
 
+// TODO(wan@google.com): ReferenceWrapper and ByRef() are neither
+// action-specific nor variadic.  Move them to a better place.
+
 // A ReferenceWrapper<T> object represents a reference to type T,
 // which can be either const or not.  It can be explicitly converted
 // from, and implicitly converted to, a T&.  Unlike a reference,
@@ -143,6 +147,13 @@ class ReferenceWrapper {
   T* pointer_;
 };
 
+// Allows the expression ByRef(x) to be printed as a reference to x.
+template <typename T>
+void PrintTo(const ReferenceWrapper<T>& ref, ::std::ostream* os) {
+  T& value = ref;
+  UniversalPrinter<T&>::Print(value, os);
+}
+
 // CallableHelper has static methods for invoking "callables",
 // i.e. function pointers and functors.  It uses overloading to
 // provide a uniform interface for invoking different kinds of

scripts/gmock_doctor.py

@@ -71,7 +71,6 @@ _COMMON_GMOCK_SYMBOLS = [
     'Not',
     'NotNull',
     'Pointee',
-    'PointeeIsInitializedProto',
     'Property',
     'Ref',
     'ResultOf',

test/gmock-generated-actions_test.cc

@@ -36,6 +36,7 @@
 #include <gmock/gmock-generated-actions.h>
 
 #include <functional>
+#include <sstream>
 #include <string>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
@@ -546,6 +547,15 @@ TEST(ByRefTest, ExplicitType) {
   // ByRef<Derived>(b);
 }
 
+// Tests that Google Mock prints expression ByRef(x) as a reference to x.
+TEST(ByRefTest, PrintsCorrectly) {
+  int n = 42;
+  ::std::stringstream expected, actual;
+  testing::internal::UniversalPrinter<const int&>::Print(n, &expected);
+  testing::internal::UniversalPrint(ByRef(n), &actual);
+  EXPECT_EQ(expected.str(), actual.str());
+}
+
 // Tests InvokeArgument<N>(...).
 
 // Tests using InvokeArgument with a nullary function.