Cut down on some struct boilerplate

src/components.rs

@@ -26,6 +26,16 @@ pub struct Viewshed {
     pub dirty: bool,
 }
 
+impl Default for Viewshed {
+    fn default() -> Self {
+        Viewshed {
+            visible_tiles: Vec::new(),
+            range: 8,
+            dirty: true,
+        }
+    }
+}
+
 #[derive(Component, Debug)]
 pub struct Monster {}
 
@@ -34,6 +44,14 @@ pub struct Name {
     pub name: String,
 }
 
+impl Name {
+    pub fn new<S: ToString>(s: S) -> Self {
+        Name {
+            name: s.to_string(),
+        }
+    }
+}
+
 #[derive(Component, Debug)]
 pub struct BlocksTile {}
 

src/spawner.rs

@@ -22,14 +22,8 @@ pub fn player(ecs: &mut World, player_x: i32, player_y: i32) -> Entity {
             render_order: 0,
         })
         .with(Player {})
-        .with(Viewshed {
-            visible_tiles: Vec::new(),
-            range: 8,
-            dirty: true,
-        })
-        .with(Name {
-            name: "Player".to_string(),
-        })
+        .with(Viewshed::default())
+        .with(Name::new("Player"))
         .with(CombatStats {
             max_hp: 30,
             hp: 30,
@@ -71,15 +65,9 @@ fn monster<S: ToString>(ecs: &mut World, x: i32, y: i32, glyph: rltk::FontCharTy
             bg: RGB::named(rltk::BLACK),
             render_order: 1,
         })
-        .with(Viewshed {
-            visible_tiles: Vec::new(),
-            range: 8,
-            dirty: true,
-        })
+        .with(Viewshed::default())
         .with(Monster {})
-        .with(Name {
-            name: name.to_string(),
-        })
+        .with(Name::new(name))
         .with(BlocksTile {})
         .with(CombatStats {
             max_hp: 16,