From f8e264954eca759ce0589ea25fbb3354f3f31bfe Mon Sep 17 00:00:00 2001
From: Martin Ridgers <martin.ridgers@epicgames.com>
Date: Wed, 5 Jan 2022 12:14:48 +0100
Subject: Contiguous range concepts for C++ libs that don't support them yet

---
 zencore/include/zencore/memory.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'zencore/include')

diff --git a/zencore/include/zencore/memory.h b/zencore/include/zencore/memory.h
index ef4d3bdbd..40a3be18c 100644
--- a/zencore/include/zencore/memory.h
+++ b/zencore/include/zencore/memory.h
@@ -14,6 +14,12 @@
 
 namespace zen {
 
+#if defined(__cpp_lib_ranges) && __cpp_lib_ranges >= 201911L
+	template <typename T> concept ContiguousRange = std::ranges::contiguous_range<T>;
+#else
+	template <typename T> concept ContiguousRange = true;
+#endif
+
 struct MemoryView;
 
 class MemoryArena
@@ -337,7 +343,7 @@ MakeMemoryView(std::initializer_list<typename std::type_identity<T>::type> List)
 }
 
 /** Make a non-owning view of the memory of the contiguous container. */
-template<std::ranges::contiguous_range R>
+template<ContiguousRange R>
 [[nodiscard]] constexpr inline MemoryView
 MakeMemoryView(const R& Container)
 {
@@ -372,7 +378,7 @@ MakeMutableMemoryView(std::initializer_list<typename std::type_identity<T>::type
 }
 
 /** Make a non-owning mutable view of the memory of the contiguous container. */
-template<std::ranges::contiguous_range R>
+template<ContiguousRange R>
 [[nodiscard]] constexpr inline MutableMemoryView
 MakeMutableMemoryView(R& Container)
 {
-- 
cgit v1.2.3