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Unified Diff: base/template_util.h

Issue 5888001: Revert 69243 - Reland 69237 - Fix raw_scoped_refptr_mismatch_checker.h.... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 10 years ago
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Index: base/template_util.h
===================================================================
--- base/template_util.h (revision 69243)
+++ base/template_util.h (working copy)
@@ -6,8 +6,6 @@
#define BASE_TEMPLATE_UTIL_H_
#pragma once
-#include "build/build_config.h"
-
namespace base {
// template definitions from tr1
@@ -27,51 +25,6 @@
template <class T> struct is_pointer : false_type {};
template <class T> struct is_pointer<T*> : true_type {};
-namespace internal {
-
-// Types small_ and big_ are guaranteed such that sizeof(small_) <
-// sizeof(big_)
-typedef char small_;
-
-struct big_ {
- small_ dummy[2];
-};
-
-#if !defined(OS_WIN)
-
-// This class is an implementation detail for is_convertible, and you
-// don't need to know how it works to use is_convertible. For those
-// who care: we declare two different functions, one whose argument is
-// of type To and one with a variadic argument list. We give them
-// return types of different size, so we can use sizeof to trick the
-// compiler into telling us which function it would have chosen if we
-// had called it with an argument of type From. See Alexandrescu's
-// _Modern C++ Design_ for more details on this sort of trick.
-
-template <typename From, typename To>
-struct ConvertHelper {
- static small_ Test(To);
- static big_ Test(...);
- static From Create();
-};
-
-#endif // !defined(OS_WIN)
-
-} // namespace internal
-
-#if !defined(OS_WIN)
-
-// Inherits from true_type if From is convertible to To, false_type otherwise.
-template <typename From, typename To>
-struct is_convertible
- : integral_constant<bool,
- sizeof(internal::ConvertHelper<From, To>::Test(
- internal::ConvertHelper<From, To>::Create()))
- == sizeof(internal::small_)> {
-};
-
-#endif // !defined(OS_WIN)
-
} // namespace base
#endif // BASE_TEMPLATE_UTIL_H_
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