From 9a426c8313877a6a8a3cd31104494ee5a1508ddd Mon Sep 17 00:00:00 2001
From: Alex Bilger <alexbilger0@gmail.com>
Date: Thu, 9 Jan 2025 12:42:12 +0100
Subject: [PATCH] [Type] Convert enable_if to concepts in fixed_array

---
 Sofa/framework/Type/src/sofa/type/fixed_array.h | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/Sofa/framework/Type/src/sofa/type/fixed_array.h b/Sofa/framework/Type/src/sofa/type/fixed_array.h
index ec1e711ca9d..edbffaa367d 100644
--- a/Sofa/framework/Type/src/sofa/type/fixed_array.h
+++ b/Sofa/framework/Type/src/sofa/type/fixed_array.h
@@ -83,18 +83,16 @@ class fixed_array
     constexpr fixed_array() {}
 
     /// Specific constructor for 1-element vectors.
-    template<size_type NN = N, typename std::enable_if<NN == 1, int>::type = 0>
     explicit constexpr fixed_array(value_type r1) noexcept
+    requires (N == 1)
     {
         elems[0] = r1;
     }
 
-    template<typename... ArgsT,
-        typename = std::enable_if_t< (std::is_convertible_v<ArgsT, value_type> && ...) >,
-        typename = std::enable_if_t< (sizeof...(ArgsT) == N && sizeof...(ArgsT) > 1) >
-    >
+    template<typename... ArgsT>
     constexpr fixed_array(ArgsT&&... r) noexcept
-        : elems{static_cast<value_type>(std::forward< ArgsT >(r))...}
+        requires ((std::convertible_to<ArgsT, value_type> && ...) && sizeof...(ArgsT) == N && sizeof...(ArgsT) > 1)
+        : elems{static_cast<value_type>(std::forward<ArgsT>(r))...}
     {}
 
     // iterator support