From 27cc0e0e43ddba51bba6f9a43c0bb823f00f1ff5 Mon Sep 17 00:00:00 2001
From: Jonas Rembser <jonas.rembser@cern.ch>
Date: Fri, 9 Jan 2026 16:43:18 +0100
Subject: [PATCH] Adapt GenVector tests to use `size` instead of `Size` of SIMD
 type

This makes the code compatible with `std::experimental::simd`. It's also
entirely backwards compatible, because the old Vc type provided both
`Size` and `size`.
---
 root/math/genvector/RandomNumberEngine.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/root/math/genvector/RandomNumberEngine.h b/root/math/genvector/RandomNumberEngine.h
index d2d01ad3..27ddd82f 100644
--- a/root/math/genvector/RandomNumberEngine.h
+++ b/root/math/genvector/RandomNumberEngine.h
@@ -46,9 +46,9 @@ inline void SetSeed(int N)
 template <typename T>
 class TypeSize {
    template <typename C>
-   static constexpr size_t Get(decltype(&C::Size))
+   static constexpr size_t Get(decltype(&C::size))
    {
-      return C::Size;
+      return C::size();
    }
    template <typename C>
    static constexpr size_t Get(typename std::enable_if<std::is_arithmetic<C>::value>::type * = 0)