Write trait

src/vga_buffer.rs

@@ -1,4 +1,6 @@
 use volatile::Volatile;
+use core::fmt;
+use core::fmt::Write;
 
 #[allow(dead_code)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -86,13 +88,18 @@ impl Writer {
   }
 }
 
+impl fmt::Write for Writer {
+  fn write_str(&mut self, s: &str) -> fmt::Result {
+    self.write_string(s);
+    Ok(())
+  }
+}
+
 pub fn yolo() {
   let mut writer = Writer {
     column_position: 0, color_code: ColorCode::new(Color::Yellow, Color::Black),
     buffer: unsafe { &mut *(0xb8000 as *mut Buffer) },
   };
 
-  writer.write_string("Gamarjoba, munde\n");
-  writer.write_string("Hella bro");
-  writer.write_string("sore は");
+  write!(writer, "Gamarjoba munde {}", 34);
 }