Delegating constructor with move semantics and std::forward

Constellation · Nov 28, 2013 · 8bd6333 · 8bd6333
1 parent eca2838
commit 8bd6333
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Showing 4 changed files with 16 additions and 3 deletions.
diff --git a/iv/forward.h b/iv/forward.h
@@ -0,0 +1,10 @@
+#ifndef IV_FORWARD_H_
+#define IV_FORWARD_H_
+#include <utility>
+
+#define IV_FORWARD_CONSTRUCTOR(Derived, Base) \
+  template<class... Args> \
+  Derived(Args&&... args) \
+    : Base(std::forward<Args>(args)...) { }
+
+#endif  // IV_FORWARD_H_
diff --git a/iv/lv5/jsarray_iterator.h b/iv/lv5/jsarray_iterator.h
@@ -1,5 +1,6 @@
 #ifndef IV_LV5_JSARRAY_ITERATOR_H_
 #define IV_LV5_JSARRAY_ITERATOR_H_
+#include <iv/forward.h>
 #include <iv/lv5/error_check.h>
 #include <iv/lv5/property.h>
 #include <iv/lv5/jsval.h>
@@ -56,7 +57,7 @@ class JSArrayIterator : public JSArrayIteratorSuper {
     return reinterpret_cast<uintptr_t>(kUniqueSymbol);
   }
 
-  using JSArrayIteratorSuper::JSArrayIteratorSuper;
+  IV_FORWARD_CONSTRUCTOR(JSArrayIterator, JSArrayIteratorSuper)
 };
 
 } }  // namespace iv::lv5

diff --git a/iv/lv5/jsmap_iterator.h b/iv/lv5/jsmap_iterator.h
@@ -1,5 +1,6 @@
 #ifndef IV_LV5_JSMAP_ITERATOR_H_
 #define IV_LV5_JSMAP_ITERATOR_H_
+#include <iv/forward.h>
 #include <iv/lv5/error_check.h>
 #include <iv/lv5/property.h>
 #include <iv/lv5/jsval.h>
@@ -55,7 +56,7 @@ class JSMapIterator : public JSMapIteratorSuper {
     return reinterpret_cast<uintptr_t>(kUniqueSymbol);
   }
 
-  using JSMapIteratorSuper::JSMapIteratorSuper;
+  IV_FORWARD_CONSTRUCTOR(JSMapIterator, JSMapIteratorSuper)
 };
 
 } }  // namespace iv::lv5

diff --git a/iv/lv5/jsstring_iterator.h b/iv/lv5/jsstring_iterator.h
@@ -1,5 +1,6 @@
 #ifndef IV_LV5_JSSTRING_ITERATOR_H_
 #define IV_LV5_JSSTRING_ITERATOR_H_
+#include <iv/forward.h>
 #include <iv/lv5/error_check.h>
 #include <iv/lv5/property.h>
 #include <iv/lv5/jsval.h>
@@ -44,7 +45,7 @@ class JSStringIterator : public JSStringIteratorSuper {
     return reinterpret_cast<uintptr_t>(kUniqueSymbol);
   }
 
-  using JSStringIteratorSuper::JSStringIteratorSuper;
+  IV_FORWARD_CONSTRUCTOR(JSStringIterator, JSStringIteratorSuper)
 };
 
 } }  // namespace iv::lv5