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+/*
+ * Copyright 2012 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+// To generate bind.h from bind.h.pump, execute:
+// /home/build/google3/third_party/gtest/scripts/pump.py bind.h.pump
+
+// Bind() is an overloaded function that converts method calls into function
+// objects (aka functors). It captures any arguments to the method by value
+// when Bind is called, producing a stateful, nullary function object. Care
+// should be taken about the lifetime of objects captured by Bind(); the
+// returned functor knows nothing about the lifetime of the method's object or
+// any arguments passed by pointer, and calling the functor with a destroyed
+// object will surely do bad things.
+//
+// Example usage:
+// struct Foo {
+// int Test1() { return 42; }
+// int Test2() const { return 52; }
+// int Test3(int x) { return x*x; }
+// float Test4(int x, float y) { return x + y; }
+// };
+//
+// int main() {
+// Foo foo;
+// cout << rtc::Bind(&Foo::Test1, &foo)() << endl;
+// cout << rtc::Bind(&Foo::Test2, &foo)() << endl;
+// cout << rtc::Bind(&Foo::Test3, &foo, 3)() << endl;
+// cout << rtc::Bind(&Foo::Test4, &foo, 7, 8.5f)() << endl;
+// }
+
+#ifndef WEBRTC_BASE_BIND_H_
+#define WEBRTC_BASE_BIND_H_
+
+#define NONAME
+
+namespace rtc {
+namespace detail {
+// This is needed because the template parameters in Bind can't be resolved
+// if they're used both as parameters of the function pointer type and as
+// parameters to Bind itself: the function pointer parameters are exact
+// matches to the function prototype, but the parameters to bind have
+// references stripped. This trick allows the compiler to dictate the Bind
+// parameter types rather than deduce them.
+template <class T> struct identity { typedef T type; };
+} // namespace detail
+
+$var n = 5
+$range i 0..n
+$for i [[
+$range j 1..i
+
+template <class ObjectT, class MethodT, class R$for j [[,
+ class P$j]]>
+class MethodFunctor$i {
+ public:
+ MethodFunctor$i(MethodT method, ObjectT* object$for j [[,
+ P$j p$j]])
+ : method_(method), object_(object)$for j [[,
+ p$(j)_(p$j)]] {}
+ R operator()() const {
+ return (object_->*method_)($for j , [[p$(j)_]]); }
+ private:
+ MethodT method_;
+ ObjectT* object_;$for j [[
+
+ P$j p$(j)_;]]
+
+};
+
+template <class FunctorT, class R$for j [[,
+ class P$j]]>
+class Functor$i {
+ public:
+ $if i == 0 [[explicit ]]
+Functor$i(const FunctorT& functor$for j [[, P$j p$j]])
+ : functor_(functor)$for j [[,
+ p$(j)_(p$j)]] {}
+ R operator()() const {
+ return functor_($for j , [[p$(j)_]]); }
+ private:
+ FunctorT functor_;$for j [[
+
+ P$j p$(j)_;]]
+
+};
+
+
+#define FP_T(x) R (ObjectT::*x)($for j , [[P$j]])
+
+template <class ObjectT, class R$for j [[,
+ class P$j]]>
+MethodFunctor$i<ObjectT, FP_T(NONAME), R$for j [[, P$j]]>
+Bind(FP_T(method), ObjectT* object$for j [[,
+ typename detail::identity<P$j>::type p$j]]) {
+ return MethodFunctor$i<ObjectT, FP_T(NONAME), R$for j [[, P$j]]>(
+ method, object$for j [[, p$j]]);
+}
+
+#undef FP_T
+#define FP_T(x) R (ObjectT::*x)($for j , [[P$j]]) const
+
+template <class ObjectT, class R$for j [[,
+ class P$j]]>
+MethodFunctor$i<const ObjectT, FP_T(NONAME), R$for j [[, P$j]]>
+Bind(FP_T(method), const ObjectT* object$for j [[,
+ typename detail::identity<P$j>::type p$j]]) {
+ return MethodFunctor$i<const ObjectT, FP_T(NONAME), R$for j [[, P$j]]>(
+ method, object$for j [[, p$j]]);
+}
+
+#undef FP_T
+#define FP_T(x) R (*x)($for j , [[P$j]])
+
+template <class R$for j [[,
+ class P$j]]>
+Functor$i<FP_T(NONAME), R$for j [[, P$j]]>
+Bind(FP_T(function)$for j [[,
+ typename detail::identity<P$j>::type p$j]]) {
+ return Functor$i<FP_T(NONAME), R$for j [[, P$j]]>(
+ function$for j [[, p$j]]);
+}
+
+#undef FP_T
+
+]]
+
+} // namespace rtc
+
+#undef NONAME
+
+#endif // WEBRTC_BASE_BIND_H_