[nostalgia/geo] Fix Vec2 test

src/nostalgia/geo/vec.cpp

@@ -8,11 +8,9 @@
 
 namespace nostalgia::geo {
 
-#ifndef OX_OS_BareMetal // doesn't compile in devKitPro for some reason
 static_assert([] {
 	Vec2 v(1, 2);
 	return v.x == 1 && v.y == 2 && v[0] == 1 && v[1] == 2 && v.size() == 2;
-});
-#endif
+}());
 
-}
+}

src/nostalgia/geo/vec.hpp

@@ -9,6 +9,7 @@
 #endif
 
 #include <ox/model/def.hpp>
+#include <ox/std/assert.hpp>
 #include <ox/std/bit.hpp>
 #include <ox/std/def.hpp>
 #include <ox/std/error.hpp>
@@ -192,11 +193,35 @@ struct Vec {
 		}
 
 		constexpr auto &operator[](std::size_t i) noexcept {
-			return start()[i];
+			if (std::is_constant_evaluated()) {
+				switch (i) {
+					case 0:
+						return x;
+					case 1:
+						return y;
+					default:
+						oxAssert(false, "Read past end of Vec2");
+						return y;
+				}
+			} else {
+				return start()[i];
+			}
 		}
 
 		constexpr const auto &operator[](std::size_t i) const noexcept {
-			return start()[i];
+			if (std::is_constant_evaluated()) {
+				switch (i) {
+					case 0:
+						return x;
+					case 1:
+						return y;
+					default:
+						oxAssert(false, "Read past end of Vec2");
+						return y;
+				}
+			} else {
+				return start()[i];
+			}
 		}
 
 		constexpr auto operator==(const Vec &v) const noexcept {