Use i8 for position instead of u16.

The only reason I picked u16 is because it's what ioctl returns for the
window size. But we're actually just hard-coding the window size, so I
don't need to use u16. I prefer to use a signed type.

1 files changed, 7 insertions, 7 deletions

diff --git a/src/main.rs b/src/main.rs
index 3b36b2e..c98c0ca 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,11 +9,11 @@ fn rand(max: i32) -> i32 {
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 struct Pos {
-    row: u16,
-    col: u16,
+    row: i8,
+    col: i8,
 }
 
-fn pos(row: u16, col: u16) -> Pos {
+fn pos(row: i8, col: i8) -> Pos {
     Pos { row, col }
 }
 
@@ -52,8 +52,8 @@ struct Screen {
 }
 
 impl Screen {
-    const ROWS: u16 = 25;
-    const COLS: u16 = 50;
+    const ROWS: i8 = 25;
+    const COLS: i8 = 50;
 
     fn init() -> Result<Screen, Box<dyn Error>> {
         // Get current terminal attrs.
@@ -239,8 +239,8 @@ impl Fruit {
     }
 
     fn new_pos(&mut self) {
-        self.pos.row = rand(i32::from(Screen::ROWS) - 4) as u16 + 2;
-        self.pos.col = rand(i32::from(Screen::COLS) - 4) as u16 + 2;
+        self.pos.row = rand(i32::from(Screen::ROWS) - 4) as i8 + 2;
+        self.pos.col = rand(i32::from(Screen::COLS) - 4) as i8 + 2;
     }
 }