Added emplace_back

Grzegorz Jabłoński
1 parent 0ce72890
Showing 1 changed file with 28 additions and 1 deletions
examples11/04-vectortmpl/vector.h
@@ -134,10 +134,37 @@ public:
     return o;
   }
-  void push_back(const C &s) {
+  template <class... Args> C &emplace_back(Args &&... args) {
+    //    cout << "emplace_back" << endl;
+    resize_before_push();
+    new (data + size) C(std::forward<Args>(args)...);
+    ++size;
+    return *(data + size);
+  }
+
+#if 1
+  C &push_back(C &&s) {
+    //    cout << "push_back with rvalue argument" << endl;
+    resize_before_push();
+    new (data + size) C(std::move(s));
+    ++size;
+    return *(data + size);
+  }
+
+  C &push_back(const C &s) {
+    //    cout << "push_back with reference argument" << endl;
     resize_before_push();
     new (data + size) C(s);
     ++size;
+    return *(data + size);
+  }
+#else
+  template <class T> C &push_back(T &&s) {
+    resize_before_push();
+    new (data + size) C(std::forward<T>(s));
+    ++size;
+    return *(data + size);
   }
+#endif
 };
 #endif /* __VECTOR_H__ */