From 1584301a2190f078648b103c9ae7273b6f9c96c2 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Thu, 2 Nov 2023 20:14:24 +0300
Subject: [PATCH] Use std::ranges for cg::area

---
 libs/cg/include/psemek/cg/area.hpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libs/cg/include/psemek/cg/area.hpp b/libs/cg/include/psemek/cg/area.hpp
index 4062a313..1b3221d5 100644
--- a/libs/cg/include/psemek/cg/area.hpp
+++ b/libs/cg/include/psemek/cg/area.hpp
@@ -3,6 +3,8 @@
 #include <psemek/geom/point.hpp>
 #include <psemek/geom/vector.hpp>
 
+#include <iterator>
+
 namespace psemek::cg
 {
 
@@ -15,7 +17,7 @@ namespace psemek::cg
 		using point_type = std::remove_cvref_t<decltype(*begin)>;
 		auto origin = point_type::zero();
 
-		for (auto it = begin, prev = std::prev(end); it != end; prev = it++)
+		for (auto it = begin, prev = std::ranges::prev(end); it != end; prev = it++)
 		{
 			result += geom::volume(origin, *prev, *it);
 		}
@@ -29,7 +31,7 @@ namespace psemek::cg
 		using scalar_type = std::remove_cvref_t<decltype((*begin)[0])>;
 		scalar_type result{};
 
-		for (auto it = begin, prev = std::prev(end); it != end; prev = it++)
+		for (auto it = begin, prev = std::ranges::prev(end); it != end; prev = it++)
 		{
 			auto const v0 = *prev - origin;
 			auto const v1 = *it - origin;