Callback API Change: Reimplement Bind(); support IgnoreResult, full currying, and use less types

base/bind_internal_win.h

Index: base/bind_internal_win.h
diff --git a/base/bind_internal_win.h b/base/bind_internal_win.h
index 250f472ca817c7b32560c28efa0dfe5dd723bf03..17d3aa3f625c367cedd1b8c1b39a174a76843e09 100644
--- a/base/bind_internal_win.h
+++ b/base/bind_internal_win.h
@@ -8,7 +8,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Specializations of FunctionTraits<> for Windows specific calling
+// Specializations of RunnableAdapter<> for Windows specific calling
 // conventions.  Please see base/bind_internal.h for more info.
 
 #ifndef BASE_BIND_INTERNAL_WIN_H_
@@ -23,203 +23,293 @@
 namespace base {
 namespace internal {
 
-template <typename Sig>
-struct FunctionTraits;
+template <typename Functor>
+class RunnableAdapter;
 
 // __stdcall Function: Arity 0.
 template <typename R>
-struct FunctionTraits<R(__stdcall *)()> {
-  typedef R (*NormalizedSig)();
-  typedef false_type IsMethod;
+class RunnableAdapter<R(__stdcall *)()> {
+ public:
+  typedef R (RunType)();
 
-  typedef R Return;
+  explicit RunnableAdapter(R(__stdcall *function)())
+      : function_(function) {
+  }
+
+  R Run() {
+    return function_();
+  }
+
+ private:
+  R (__stdcall *function_)();
 };
 
 // __fastcall Function: Arity 0.
 template <typename R>
-struct FunctionTraits<R(__fastcall *)()> {
-  typedef R (*NormalizedSig)();
-  typedef false_type IsMethod;
+class RunnableAdapter<R(__fastcall *)()> {
+ public:
+  typedef R (RunType)();
+
+  explicit RunnableAdapter(R(__fastcall *function)())
+      : function_(function) {
+  }
+
+  R Run() {
+    return function_();
+  }
 
-  typedef R Return;
+ private:
+  R (__fastcall *function_)();
 };
 
 // __stdcall Function: Arity 1.
-template <typename R, typename X1>
-struct FunctionTraits<R(__stdcall *)(X1)> {
-  typedef R (*NormalizedSig)(X1);
-  typedef false_type IsMethod;
+template <typename R, typename A1>
+class RunnableAdapter<R(__stdcall *)(A1)> {
+ public:
+  typedef R (RunType)(A1);
 
-  typedef R Return;
+  explicit RunnableAdapter(R(__stdcall *function)(A1))
+      : function_(function) {
+  }
 
-  // Target type for each bound parameter.
-  typedef X1 B1;
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1) {
+    return function_(a1);
+  }
+
+ private:
+  R (__stdcall *function_)(A1);
 };
 
 // __fastcall Function: Arity 1.
-template <typename R, typename X1>
-struct FunctionTraits<R(__fastcall *)(X1)> {
-  typedef R (*NormalizedSig)(X1);
-  typedef false_type IsMethod;
+template <typename R, typename A1>
+class RunnableAdapter<R(__fastcall *)(A1)> {
+ public:
+  typedef R (RunType)(A1);
+
+  explicit RunnableAdapter(R(__fastcall *function)(A1))
+      : function_(function) {
+  }
 
-  typedef R Return;
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1) {
+    return function_(a1);
+  }
 
-  // Target type for each bound parameter.
-  typedef X1 B1;
+ private:
+  R (__fastcall *function_)(A1);
 };
 
 // __stdcall Function: Arity 2.
-template <typename R, typename X1, typename X2>
-struct FunctionTraits<R(__stdcall *)(X1, X2)> {
-  typedef R (*NormalizedSig)(X1, X2);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
+template <typename R, typename A1, typename A2>
+class RunnableAdapter<R(__stdcall *)(A1, A2)> {
+ public:
+  typedef R (RunType)(A1, A2);
+
+  explicit RunnableAdapter(R(__stdcall *function)(A1, A2))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2) {
+    return function_(a1, a2);
+  }
+
+ private:
+  R (__stdcall *function_)(A1, A2);
 };
 
 // __fastcall Function: Arity 2.
-template <typename R, typename X1, typename X2>
-struct FunctionTraits<R(__fastcall *)(X1, X2)> {
-  typedef R (*NormalizedSig)(X1, X2);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
+template <typename R, typename A1, typename A2>
+class RunnableAdapter<R(__fastcall *)(A1, A2)> {
+ public:
+  typedef R (RunType)(A1, A2);
+
+  explicit RunnableAdapter(R(__fastcall *function)(A1, A2))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2) {
+    return function_(a1, a2);
+  }
+
+ private:
+  R (__fastcall *function_)(A1, A2);
 };
 
 // __stdcall Function: Arity 3.
-template <typename R, typename X1, typename X2, typename X3>
-struct FunctionTraits<R(__stdcall *)(X1, X2, X3)> {
-  typedef R (*NormalizedSig)(X1, X2, X3);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
+template <typename R, typename A1, typename A2, typename A3>
+class RunnableAdapter<R(__stdcall *)(A1, A2, A3)> {
+ public:
+  typedef R (RunType)(A1, A2, A3);
+
+  explicit RunnableAdapter(R(__stdcall *function)(A1, A2, A3))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3) {
+    return function_(a1, a2, a3);
+  }
+
+ private:
+  R (__stdcall *function_)(A1, A2, A3);
 };
 
 // __fastcall Function: Arity 3.
-template <typename R, typename X1, typename X2, typename X3>
-struct FunctionTraits<R(__fastcall *)(X1, X2, X3)> {
-  typedef R (*NormalizedSig)(X1, X2, X3);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
+template <typename R, typename A1, typename A2, typename A3>
+class RunnableAdapter<R(__fastcall *)(A1, A2, A3)> {
+ public:
+  typedef R (RunType)(A1, A2, A3);
+
+  explicit RunnableAdapter(R(__fastcall *function)(A1, A2, A3))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3) {
+    return function_(a1, a2, a3);
+  }
+
+ private:
+  R (__fastcall *function_)(A1, A2, A3);
 };
 
 // __stdcall Function: Arity 4.
-template <typename R, typename X1, typename X2, typename X3, typename X4>
-struct FunctionTraits<R(__stdcall *)(X1, X2, X3, X4)> {
-  typedef R (*NormalizedSig)(X1, X2, X3, X4);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
-  typedef X4 B4;
+template <typename R, typename A1, typename A2, typename A3, typename A4>
+class RunnableAdapter<R(__stdcall *)(A1, A2, A3, A4)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4);
+
+  explicit RunnableAdapter(R(__stdcall *function)(A1, A2, A3, A4))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4) {
+    return function_(a1, a2, a3, a4);
+  }
+
+ private:
+  R (__stdcall *function_)(A1, A2, A3, A4);
 };
 
 // __fastcall Function: Arity 4.
-template <typename R, typename X1, typename X2, typename X3, typename X4>
-struct FunctionTraits<R(__fastcall *)(X1, X2, X3, X4)> {
-  typedef R (*NormalizedSig)(X1, X2, X3, X4);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
-  typedef X4 B4;
+template <typename R, typename A1, typename A2, typename A3, typename A4>
+class RunnableAdapter<R(__fastcall *)(A1, A2, A3, A4)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4);
+
+  explicit RunnableAdapter(R(__fastcall *function)(A1, A2, A3, A4))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4) {
+    return function_(a1, a2, a3, a4);
+  }
+
+ private:
+  R (__fastcall *function_)(A1, A2, A3, A4);
 };
 
 // __stdcall Function: Arity 5.
-template <typename R, typename X1, typename X2, typename X3, typename X4,
-    typename X5>
-struct FunctionTraits<R(__stdcall *)(X1, X2, X3, X4, X5)> {
-  typedef R (*NormalizedSig)(X1, X2, X3, X4, X5);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
-  typedef X4 B4;
-  typedef X5 B5;
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5>
+class RunnableAdapter<R(__stdcall *)(A1, A2, A3, A4, A5)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5);
+
+  explicit RunnableAdapter(R(__stdcall *function)(A1, A2, A3, A4, A5))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5) {
+    return function_(a1, a2, a3, a4, a5);
+  }
+
+ private:
+  R (__stdcall *function_)(A1, A2, A3, A4, A5);
 };
 
 // __fastcall Function: Arity 5.
-template <typename R, typename X1, typename X2, typename X3, typename X4,
-    typename X5>
-struct FunctionTraits<R(__fastcall *)(X1, X2, X3, X4, X5)> {
-  typedef R (*NormalizedSig)(X1, X2, X3, X4, X5);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
-  typedef X4 B4;
-  typedef X5 B5;
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5>
+class RunnableAdapter<R(__fastcall *)(A1, A2, A3, A4, A5)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5);
+
+  explicit RunnableAdapter(R(__fastcall *function)(A1, A2, A3, A4, A5))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5) {
+    return function_(a1, a2, a3, a4, a5);
+  }
+
+ private:
+  R (__fastcall *function_)(A1, A2, A3, A4, A5);
 };
 
 // __stdcall Function: Arity 6.
-template <typename R, typename X1, typename X2, typename X3, typename X4,
-    typename X5, typename X6>
-struct FunctionTraits<R(__stdcall *)(X1, X2, X3, X4, X5, X6)> {
-  typedef R (*NormalizedSig)(X1, X2, X3, X4, X5, X6);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
-  typedef X4 B4;
-  typedef X5 B5;
-  typedef X6 B6;
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6>
+class RunnableAdapter<R(__stdcall *)(A1, A2, A3, A4, A5, A6)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5, A6);
+
+  explicit RunnableAdapter(R(__stdcall *function)(A1, A2, A3, A4, A5, A6))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6) {
+    return function_(a1, a2, a3, a4, a5, a6);
+  }
+
+ private:
+  R (__stdcall *function_)(A1, A2, A3, A4, A5, A6);
 };
 
 // __fastcall Function: Arity 6.
-template <typename R, typename X1, typename X2, typename X3, typename X4,
-    typename X5, typename X6>
-struct FunctionTraits<R(__fastcall *)(X1, X2, X3, X4, X5, X6)> {
-  typedef R (*NormalizedSig)(X1, X2, X3, X4, X5, X6);
-  typedef false_type IsMethod;
-
-  typedef R Return;
-
-  // Target type for each bound parameter.
-  typedef X1 B1;
-  typedef X2 B2;
-  typedef X3 B3;
-  typedef X4 B4;
-  typedef X5 B5;
-  typedef X6 B6;
+template <typename R, typename A1, typename A2, typename A3, typename A4,
+    typename A5, typename A6>
+class RunnableAdapter<R(__fastcall *)(A1, A2, A3, A4, A5, A6)> {
+ public:
+  typedef R (RunType)(A1, A2, A3, A4, A5, A6);
+
+  explicit RunnableAdapter(R(__fastcall *function)(A1, A2, A3, A4, A5, A6))
+      : function_(function) {
+  }
+
+  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
+      typename CallbackParamTraits<A2>::ForwardType a2,
+      typename CallbackParamTraits<A3>::ForwardType a3,
+      typename CallbackParamTraits<A4>::ForwardType a4,
+      typename CallbackParamTraits<A5>::ForwardType a5,
+      typename CallbackParamTraits<A6>::ForwardType a6) {
+    return function_(a1, a2, a3, a4, a5, a6);
+  }
+
+ private:
+  R (__fastcall *function_)(A1, A2, A3, A4, A5, A6);
 };
 
 }  // namespace internal