stronger bounds checks

include/fggl/entity/gridworld/zone.hpp

@@ -34,17 +34,22 @@ namespace fggl::entity::grid {
 	template<typename T, uint32_t width, uint32_t height>
 	struct Grid {
 		public:
+			constexpr static std::array<math::vec2i, 4> DIRECTIONS{{ {-1, 0}, {0, -1}, {1, 0}, {0, 1} }};
+
 			Grid() = default;
 
 			inline T& get(GridPos pos) {
+				assert(inBounds(pos));
 				return m_cells[getCellIndex(pos)];
 			}
 
 			const T& get(GridPos pos) const {
+				assert(inBounds(pos));
 				return m_cells[getCellIndex(pos)];
 			}
 
 			inline void set(GridPos pos, T value) {
+				assert(inBounds(pos));
 				m_cells[getCellIndex(pos)] = value;
 			}
 
@@ -57,7 +62,6 @@ namespace fggl::entity::grid {
 			constexpr static math::vec2i size = math::vec2i(width, height);
 			std::array<T, size.x * size.y> m_cells;
 
-
 			inline uint32_t getCellIndex(GridPos pos) const {
 				assert( inBounds(pos));
 				return pos.y * size.x + pos.x;
@@ -98,6 +102,7 @@ namespace fggl::entity::grid {
 				clear();
 			}
 
+			[[nodiscard]]
 			inline bool inBounds(GridPos pos) const {
 				return 0 <= pos.x && pos.x <= width
 				    && 0 <= pos.y && pos.y <= height;