Retreat ! go back to C++11 only code

This reverts commit b42de850314e7d76f873ddc7d64c5f7d2a30eb00.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/utils.hh b/src/utils.hh
index 7a7eb071..ee2591c0 100644
--- a/src/utils.hh
+++ b/src/utils.hh
@@ -8,6 +8,34 @@
 namespace Kakoune
 {
 
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args&&... args)
+{
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+
+template<size_t... I>
+struct IndexSequence
+{
+    using Next = IndexSequence<I..., sizeof...(I)>;
+};
+
+template<size_t N>
+struct MakeIndexSequence
+{
+    using Type = typename MakeIndexSequence<N-1>::Type::Next;
+};
+
+template<>
+struct MakeIndexSequence<0>
+{
+    using Type = IndexSequence<>;
+};
+
+template<size_t N>
+constexpr typename MakeIndexSequence<N>::Type
+make_index_sequence() { return typename MakeIndexSequence<N>::Type{}; }
+
 // *** Singleton ***
 //
 // Singleton helper class, every singleton type T should inherit