Use boost function for compatibility

ext/libclementine-common/core/closure.cpp

@@ -33,7 +33,7 @@ ClosureBase::~ClosureBase() {
 CallbackClosure::CallbackClosure(
     QObject* sender,
     const char* signal,
-    std::function<void()> callback)
+    boost::function<void()> callback)
   : ClosureBase(new ObjectHelper(sender, signal, this)),
     callback_(callback) {
 }
@@ -67,7 +67,7 @@ void Unpack(QList<QGenericArgument>*) {}
 _detail::ClosureBase* NewClosure(
     QObject* sender,
     const char* signal,
-    std::function<void()> callback) {
+    boost::function<void()> callback) {
   return new _detail::CallbackClosure(
       sender, signal, callback);
 }

ext/libclementine-common/core/closure.h

@@ -158,12 +158,12 @@ class CallbackClosure : public ClosureBase {
   CallbackClosure(
       QObject* sender,
       const char* signal,
-      std::function<void()> callback);
+      boost::function<void()> callback);
 
   virtual void Invoke();
 
  private:
-  std::function<void()> callback_;
+  boost::function<void()> callback_;
 };
 
 }  // namespace _detail
@@ -194,13 +194,13 @@ _detail::ClosureBase* NewClosure(
 _detail::ClosureBase* NewClosure(
     QObject* sender,
     const char* signal,
-    std::function<void()> callback);
+    boost::function<void()> callback);
 
 template <typename... Args>
 _detail::ClosureBase* NewClosure(
     QObject* sender,
     const char* signal,
-    std::function<void(Args...)> callback,
+    boost::function<void(Args...)> callback,
     const Args&... args) {
   return NewClosure(sender, signal, boost::bind(callback, args...));
 }

tests/closure_test.cpp

@@ -5,6 +5,8 @@
 #include <QSharedPointer>
 #include <QSignalSpy>
 
+#include <boost/function.hpp>
+
 #include "config.h"
 #include "core/closure.h"
 #include "test_utils.h"
@@ -92,7 +94,7 @@ TEST(ClosureTest, ClosureWorksWithStandardFunctions) {
   bool called = false;
   int question = 42;
   int answer = 0;
-  std::tr1::function<void(bool*,int,int*)> callback(&Foo);
+  boost::function<void(bool*,int,int*)> callback(&Foo);
   NewClosure(
       &sender, SIGNAL(Emitted()),
       callback, &called, question, &answer);