Move third_party/mojo/src/mojo/public to mojo/public

BUG=None
NOPRESUBMIT=true

Review URL: https://codereview.chromium.org/1410053006

Cr-Commit-Position: refs/heads/master@{#359461}

1 files changed, 53 insertions, 0 deletions

diff --git a/mojo/public/cpp/bindings/lib/callback_internal.h b/mojo/public/cpp/bindings/lib/callback_internal.h
new file mode 100644
index 0000000..9df5b40a7
--- /dev/null
+++ b/mojo/public/cpp/bindings/lib/callback_internal.h
@@ -0,0 +1,53 @@
+// Copyright 2014 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.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_CALLBACK_INTERNAL_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_LIB_CALLBACK_INTERNAL_H_
+
+#include "mojo/public/cpp/bindings/lib/template_util.h"
+
+namespace mojo {
+class String;
+
+namespace internal {
+
+template <typename T>
+struct Callback_ParamTraits {
+  typedef T ForwardType;
+};
+
+template <>
+struct Callback_ParamTraits<String> {
+  typedef const String& ForwardType;
+};
+
+template <typename T, typename... Args>
+struct HasCompatibleCallOperator {
+  // This template's second parameter is the signature of the operator()
+  // overload we want to try to detect:
+  //   void operator()(Args...) const;
+  template <typename U,
+            void (U::*)(
+                typename internal::Callback_ParamTraits<Args>::ForwardType...)
+                const>
+  struct TestType {};
+
+  // This matches type U if it has a call operator with the
+  // expected signature.
+  template <typename U>
+  static YesType Test(TestType<U, &U::operator()>*);
+
+  // This matches anything else.
+  template <typename U>
+  static NoType Test(...);
+
+  // HasCompatibleCallOperator<T, Args...>::value will be true if T has a
+  // compatible call operator.
+  enum { value = (sizeof(Test<T>(nullptr)) == sizeof(YesType)) };
+};
+
+}  // namespace internal
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_CALLBACK_INTERNAL_H_