add count_if to smart ranges

2020-03-09 18:43:21 +01:00
parent b88a6c9de9
commit 227b1cd5c7
1 changed files with 10 additions and 1 deletions
--- a/src/OpenMesh/Core/Mesh/SmartRange.hh
+++ b/src/OpenMesh/Core/Mesh/SmartRange.hh
@@ -353,7 +353,16 @@ struct SmartRangeT
  }


-
+  template <typename Functor>
+  auto count_if(Functor&& f) -> int
+  {
+    int count = 0;
+    auto range = static_cast<const RangeT*>(this);
+    for (const auto& e : *range)
+      if (f(e))
+        ++count;
+    return count;
+  }


 };