function to check if robot is in the map

src/main.rs

@@ -20,13 +20,15 @@ use std::io;
 mod robot;
 mod world;
 
-fn check_map(r: &robot::Robot, w: &world::World) -> Result<(), &'static str> {}
-fn check_collisions(
-    w: &world::World,
-    r: &robot::Robot,
-    h: &collection::HashMap<robot::Position, u32>,
-) -> Result<(), &'static str> {
+/// Check if the robot is in the map.
+fn check_map(r: &robot::Robot, w: &world::World) -> Result<(), String> {
+    if (r.p.x, r.p.y) < (0, 0) && (r.p.x, r.p.y) > (w.x, w.y) {
+        Err(format!("The robot {} is off map", r.id))
+    } else {
+        Ok(())
+    }
 }
+
 /// Parse the config file, generate the world and robot pool.
 fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::World, &'static str> {
     let mut lines = conf.lines();