Introduce an injection point to configure the internal pointer of WeakPtr

base/memory/weak_ptr_unittest.nc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This is a "No Compile Test" suite.
 // http://dev.chromium.org/developers/testing/no-compile-tests
 
 #include "base/memory/weak_ptr.h"
 
 namespace base {
 
 struct Producer : SupportsWeakPtr<Producer> {};
 struct DerivedProducer : Producer {};
 struct OtherDerivedProducer : Producer {};
 struct MultiplyDerivedProducer : Producer,
                                  SupportsWeakPtr<MultiplyDerivedProducer> {};
 struct Unrelated {};
 struct DerivedUnrelated : Unrelated {};
 
-#if defined(NCTEST_AUTO_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*const'"]
+#if defined(NCTEST_AUTO_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'PointerType<base::DerivedProducer>' with an lvalue of type 'const PointerType<base::Producer>'"]
 
 void WontCompile() {
   Producer f;
   WeakPtr<Producer> ptr = f.AsWeakPtr();
   WeakPtr<DerivedProducer> derived_ptr = ptr;
 }
 
-#elif defined(NCTEST_STATIC_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*const'"]
+#elif defined(NCTEST_STATIC_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'PointerType<base::DerivedProducer>' with an lvalue of type 'const PointerType<base::Producer>'"]
 
 void WontCompile() {
   Producer f;
   WeakPtr<Producer> ptr = f.AsWeakPtr();
   WeakPtr<DerivedProducer> derived_ptr =
       static_cast<WeakPtr<DerivedProducer> >(ptr);
 }
 
 #elif defined(NCTEST_AUTO_REF_DOWNCAST)  // [r"fatal error: non-const lvalue reference to type 'WeakPtr<base::DerivedProducer>' cannot bind to a value of unrelated type 'WeakPtr<base::Producer>'"]
 
@@ skipping 13 matching lines @@
 }
 
 #elif defined(NCTEST_STATIC_ASWEAKPTR_DOWNCAST)  // [r"no matching function"]
 
 void WontCompile() {
   Producer f;
   WeakPtr<DerivedProducer> ptr =
       SupportsWeakPtr<Producer>::StaticAsWeakPtr<DerivedProducer>(&f);
 }
 
-#elif defined(NCTEST_UNSAFE_HELPER_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*'"]
+#elif defined(NCTEST_UNSAFE_HELPER_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'Pointer' \(aka 'base::DerivedProducer \*'\) with an rvalue of type 'typename std::remove_reference<Producer \*&>::type' \(aka 'base::Producer \*'\)"]
 
 void WontCompile() {
   Producer f;
   WeakPtr<DerivedProducer> ptr = AsWeakPtr(&f);
 }
 
 #elif defined(NCTEST_UNSAFE_INSTANTIATED_HELPER_DOWNCAST)  // [r"no matching function"]
 
 void WontCompile() {
   Producer f;
   WeakPtr<DerivedProducer> ptr = AsWeakPtr<DerivedProducer>(&f);
 }
 
-#elif defined(NCTEST_UNSAFE_WRONG_INSANTIATED_HELPER_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*'"]
+#elif defined(NCTEST_UNSAFE_WRONG_INSTANTIATED_HELPER_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'Pointer' \(aka 'base::DerivedProducer \*'\) with an rvalue of type 'typename std::remove_reference<Producer \*&>::type' \(aka 'base::Producer \*'\)"]
 
 void WontCompile() {
-  Producer f; 
+  Producer f;
   WeakPtr<DerivedProducer> ptr = AsWeakPtr<Producer>(&f);
 }
 
-#elif defined(NCTEST_UNSAFE_HELPER_CAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::OtherDerivedProducer \*' with an lvalue of type 'base::DerivedProducer \*'"]
+#elif defined(NCTEST_UNSAFE_HELPER_CAST)  // [r"fatal error: cannot initialize a member subobject of type 'Pointer' \(aka 'base::OtherDerivedProducer \*'\) with an rvalue of type 'typename std::remove_reference<DerivedProducer \*&>::type' \(aka 'base::DerivedProducer \*'\)"]
 
 void WontCompile() {
   DerivedProducer f;
   WeakPtr<OtherDerivedProducer> ptr = AsWeakPtr(&f);
 }
 
 #elif defined(NCTEST_UNSAFE_INSTANTIATED_HELPER_SIDECAST)  // [r"fatal error: no matching function for call to 'AsWeakPtr'"]
 
 void WontCompile() {
   DerivedProducer f;
   WeakPtr<OtherDerivedProducer> ptr = AsWeakPtr<OtherDerivedProducer>(&f);
 }
 
-#elif defined(NCTEST_UNSAFE_WRONG_INSTANTIATED_HELPER_SIDECAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::OtherDerivedProducer \*' with an lvalue of type 'base::DerivedProducer \*'"]
+#elif defined(NCTEST_UNSAFE_WRONG_INSTANTIATED_HELPER_SIDECAST)  // [r"fatal error: cannot initialize a member subobject of type 'Pointer' \(aka 'base::OtherDerivedProducer \*'\) with an rvalue of type 'typename std::remove_reference<DerivedProducer \*&>::type' \(aka 'base::DerivedProducer \*'\)"]
 
 void WontCompile() {
   DerivedProducer f;
   WeakPtr<OtherDerivedProducer> ptr = AsWeakPtr<DerivedProducer>(&f);
 }
 
-#elif defined(NCTEST_UNRELATED_HELPER)  // [r"fatal error: cannot initialize a member subobject of type 'base::Unrelated \*' with an lvalue of type 'base::DerivedProducer \*'"]
+#elif defined(NCTEST_UNRELATED_HELPER)  // [r"fatal error: cannot initialize a member subobject of type 'Pointer' \(aka 'base::Unrelated \*'\) with an rvalue of type 'typename std::remove_reference<DerivedProducer \*&>::type' \(aka 'base::DerivedProducer \*'\)"]
 
 void WontCompile() {
   DerivedProducer f;
   WeakPtr<Unrelated> ptr = AsWeakPtr(&f);
 }
 
 #elif defined(NCTEST_UNRELATED_INSTANTIATED_HELPER)  // [r"no matching function"]
 
 void WontCompile() {
   DerivedProducer f;
   WeakPtr<Unrelated> ptr = AsWeakPtr<Unrelated>(&f);
 }
 
-#elif defined(NCTEST_COMPLETELY_UNRELATED_HELPER)  // [r"fatal error: static_assert failed \"AsWeakPtr argument must inherit from SupportsWeakPtr\""]
+#elif defined(NCTEST_COMPLETELY_UNRELATED_HELPER)  // [r"fatal error: no matching function for call to 'AsWeakPtr'"]
 
 void WontCompile() {
   Unrelated f;
   WeakPtr<Unrelated> ptr = AsWeakPtr(&f);
 }
 
-#elif defined(NCTEST_DERIVED_COMPLETELY_UNRELATED_HELPER)  // [r"fatal error: static_assert failed \"AsWeakPtr argument must inherit from SupportsWeakPtr\""]
+#elif defined(NCTEST_DERIVED_COMPLETELY_UNRELATED_HELPER)  // [r"fatal error: no matching function for call to 'AsWeakPtr'"]
 
 void WontCompile() {
   DerivedUnrelated f;
   WeakPtr<Unrelated> ptr = AsWeakPtr(&f);
 }
 
-#elif defined(NCTEST_AMBIGUOUS_ANCESTORS)  // [r"fatal error: use of undeclared identifier 'AsWeakPtrImpl'"]
+#elif defined(NCTEST_AMBIGUOUS_ANCESTORS)  // [r"fatal error: no matching function for call to 'AsWeakPtr'"]
 
 void WontCompile() {
   MultiplyDerivedProducer f;
   WeakPtr<MultiplyDerivedProducer> ptr = AsWeakPtr(&f);
 }
 
 #endif
 
 }