From a742057c0cd30ddb6d825a6e57f913b027d3fb9d Mon Sep 17 00:00:00 2001
From: Johannes Kalmbach <johannes.kalmbach@gmail.com>
Date: Wed, 11 Dec 2024 11:39:48 +0100
Subject: [PATCH 1/2] Also allow for move-only views.

---
 include/range/v3/range/concepts.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/range/v3/range/concepts.hpp b/include/range/v3/range/concepts.hpp
index 1e2c6c633..615d84d45 100644
--- a/include/range/v3/range/concepts.hpp
+++ b/include/range/v3/range/concepts.hpp
@@ -251,7 +251,7 @@ namespace ranges
     template<typename T>
     CPP_concept view_ =
         range<T> &&
-        copyable<T> &&
+        movable<T> &&
         enable_view<T>;
 
     /// \concept viewable_range

From f3057d3b4b417632c7ed504b3c472fe0dcc0bd62 Mon Sep 17 00:00:00 2001
From: Johannes Kalmbach <johannes.kalmbach@gmail.com>
Date: Wed, 11 Dec 2024 11:55:18 +0100
Subject: [PATCH 2/2] Add a test for the changed concept

---
 test/utility/concepts.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/test/utility/concepts.cpp b/test/utility/concepts.cpp
index bc088c31f..7a6a373df 100644
--- a/test/utility/concepts.cpp
+++ b/test/utility/concepts.cpp
@@ -318,6 +318,14 @@ struct myview : ranges::view_base {
 };
 CPP_assert(ranges::view_<myview>);
 
+struct move_only_view : myview {
+    move_only_view(const move_only_view&) = delete;
+    move_only_view& operator=(const move_only_view &) = delete;
+    move_only_view(move_only_view&&) = default;
+    move_only_view& operator=(move_only_view &&) = default;
+};
+CPP_assert(ranges::view_<move_only_view>);
+
 CPP_template(class T)
     (requires ranges::regular<T>)
 constexpr bool is_regular(T&&)