1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/immer/immer/heap/identity_heap.hpp b/third_party/immer/immer/heap/identity_heap.hpp
new file mode 100644
index 0000000000..032cb3f221
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+++ b/third_party/immer/immer/heap/identity_heap.hpp
@@ -0,0 +1,34 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <cstdlib>
+
+namespace immer {
+
+/*!
+ * A heap that simply passes on to the parent heap.
+ */
+template <typename Base>
+struct identity_heap : Base
+{
+    template <typename... Tags>
+    static void* allocate(std::size_t size, Tags... tags)
+    {
+        return Base::allocate(size, tags...);
+    }
+
+    template <typename... Tags>
+    static void deallocate(std::size_t size, void* data, Tags... tags)
+    {
+        Base::deallocate(size, data, tags...);
+    }
+};
+
+} // namespace immer