Revert "Removed cpp14 polyfills" to fix travis again.

This reverts commit def7acc366.

zeiterfassungcorelib/cpp14polyfills.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#if __cplusplus < 201402L && _MSC_VER < 1800
+
+// std includes
+#include <memory>
+#include <cstddef>
+#include <memory>
+#include <type_traits>
+#include <utility>
+
+namespace std {
+    template<class T> struct _Unique_if {
+        typedef unique_ptr<T> _Single_object;
+    };
+
+    template<class T> struct _Unique_if<T[]> {
+        typedef unique_ptr<T[]> _Unknown_bound;
+    };
+
+    template<class T, size_t N> struct _Unique_if<T[N]> {
+        typedef void _Known_bound;
+    };
+
+    template<class T, class... Args>
+        typename _Unique_if<T>::_Single_object
+        make_unique(Args&&... args) {
+            return unique_ptr<T>(new T(std::forward<Args>(args)...));
+        }
+
+    template<class T>
+        typename _Unique_if<T>::_Unknown_bound
+        make_unique(size_t n) {
+            typedef typename remove_extent<T>::type U;
+            return unique_ptr<T>(new U[n]());
+        }
+
+    template<class T, class... Args>
+        typename _Unique_if<T>::_Known_bound
+        make_unique(Args&&...) = delete;
+}
+
+#endif // __cplusplus < 201402L

zeiterfassungcorelib/zeiterfassungapi.cpp

@@ -26,6 +26,9 @@
 #include "replies/getabsencesreply.h"
 #include "replies/getdayinforeply.h"
 
+//add support for pre cpp14 compilers
+#include "cpp14polyfills.h"
+
 ZeiterfassungApi::ZeiterfassungApi(const QUrl &url, QObject *parent) :
     QObject(parent),
     m_url(url),

zeiterfassungcorelib/zeiterfassungcorelib.pro

@@ -29,7 +29,8 @@ SOURCES += timeutils.cpp \
            replies/updatetimeassignmentreply.cpp \
            replies/zeiterfassungreply.cpp
 
-HEADERS += timeutils.h \
+HEADERS += cpp14polyfills.h \
+           timeutils.h \
            zeiterfassungapi.h \
            zeiterfassungcorelib_global.h \
            zeiterfassungsettings.h \