libcore: Improved de::map() function

skyjake · Sep 1, 2019 · 9865532 · 9865532
1 parent e2c2a88
commit 9865532
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/doomsday/libs/core/include/de/libcore.h b/doomsday/libs/core/include/de/libcore.h
@@ -671,6 +671,7 @@ inline OutContainer map(const InContainer &input, Func func) {
     return out;
 }
 
+/*
 template <typename OutContainer, typename InContainer>
 inline OutContainer map(const InContainer &input,
                          std::function<typename OutContainer::value_type (
@@ -681,6 +682,20 @@ inline OutContainer map(const InContainer &input,
     }
     return out;
 }
+*/
+
+template <typename OutContainer,
+          typename InContainer,
+          typename Func,
+          typename Inserter = std::back_insert_iterator<OutContainer>>
+inline OutContainer map(const InContainer &input, Func func) {
+    OutContainer out;
+    Inserter ins(out);
+    for (const auto &i : input) {
+        *ins++ = func(i);
+    }
+    return out;
+}
 
 template <typename ContainerType>
 inline ContainerType filter(ContainerType const &c,