From a862c79bd90594648c2e187be17fbb70a6429fb2 Mon Sep 17 00:00:00 2001
From: Bernhard Manfred Gruber <bernhardmgruber@gmail.com>
Date: Thu, 4 Mar 2021 12:55:57 +0100
Subject: [PATCH] use a different workaround for non-default-constructible type
 list elements

Suggested here: https://github.com/boostorg/mp11/issues/23
---
 include/llama/Core.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/llama/Core.hpp b/include/llama/Core.hpp
index 5493e197dc..77515056f6 100644
--- a/include/llama/Core.hpp
+++ b/include/llama/Core.hpp
@@ -383,8 +383,8 @@ namespace llama
             std::size_t size = 0;
 #endif
             using FlatDD = FlattenDatumDomain<DatumStruct<DatumElements...>>;
-            mp_for_each<mp_iota<mp_size<FlatDD>>>([&](auto i) constexpr {
-                using T = mp_at<FlatDD, decltype(i)>;
+            mp_for_each<mp_transform<mp_identity, FlatDD>>([&](auto e) constexpr {
+                using T = typename decltype(e)::type;
                 internal::roundUpToMultiple(size, alignof(T));
                 size += sizeof(T);
             });