Fix clang 15 reverse_view borking.

engine/header_list.cmake

@@ -16,6 +16,7 @@ set(core_headers
   ${prefix}/core/ptr.hpp
   ${prefix}/core/radians.hpp
   ${prefix}/core/random.hpp
+  ${prefix}/core/reverse_view.hpp
   ${prefix}/core/signal.hpp
   ${prefix}/core/time.hpp
   ${prefix}/core/version.hpp

engine/include/le/core/reverse_view.hpp

@@ -0,0 +1,23 @@
+#pragma once
+#include <iterator>
+
+namespace le {
+template <typename It>
+struct Reversed {
+	It first{};
+	It last{};
+
+	constexpr auto begin() const { return std::reverse_iterator<It>{first}; }
+	constexpr auto end() const { return std::reverse_iterator<It>{last}; }
+};
+
+template <typename It>
+constexpr auto reverse_view(It first, It last) {
+	return Reversed<It>{first, last};
+}
+
+template <typename ContainerT>
+constexpr auto reverse_view(ContainerT&& container) {
+	return reverse_view(std::end(container), std::begin(container));
+}
+} // namespace le

engine/src/engine.cpp

@@ -3,12 +3,12 @@
 
 #include <impl/frame_profiler.hpp>
 #include <le/core/enumerate.hpp>
+#include <le/core/reverse_view.hpp>
 #include <le/core/zip_ranges.hpp>
 #include <le/engine.hpp>
 #include <le/error.hpp>
 #include <le/input/receiver.hpp>
 #include <format>
-#include <ranges>
 #include <thread>
 
 namespace le {
@@ -230,19 +230,19 @@ auto Engine::setup_signals(GLFWwindow* window) -> void {
 		auto& engine = get_engine(window);
 		auto& input_state = engine.m_input_state;
 		if (key >= 0 && key < static_cast<int>(input_state.keyboard.size())) { input_state.keyboard.at(static_cast<std::size_t>(key)) = to_action(action); }
-		for (auto* receiver : std::ranges::reverse_view(g_receivers)) {
+		for (auto* receiver : reverse_view(g_receivers)) {
 			if (receiver->on_key(key, action, mods)) { break; }
 		}
 	});
 	glfwSetCharCallback(window, [](GLFWwindow* /*window*/, std::uint32_t codepoint) {
-		for (auto* receiver : std::ranges::reverse_view(g_receivers)) {
+		for (auto* receiver : reverse_view(g_receivers)) {
 			if (receiver->on_char(graphics::Codepoint{codepoint})) { break; }
 		}
 	});
 	glfwSetMouseButtonCallback(window, [](GLFWwindow* window, int button, int action, [[maybe_unused]] int mods) {
 		auto& input_state = get_engine(window).m_input_state;
 		input_state.mouse_buttons.at(static_cast<std::size_t>(button)) = to_action(action);
-		for (auto* receiver : std::ranges::reverse_view(g_receivers)) {
+		for (auto* receiver : reverse_view(g_receivers)) {
 			if (receiver->on_mouse(button, action, mods)) { break; }
 		}
 	});