rustbyexample/primitives/primitives_tuples.rs

@@ -1,5 +1,3 @@
-use std::fmt;
-
 fn reverse(pair: (i32, bool)) -> (bool, i32) {
     let (integer, boolean) = pair;
     (boolean, integer)
@@ -8,16 +6,6 @@ fn reverse(pair: (i32, bool)) -> (bool, i32) {
 #[derive(Debug)]
 struct Matrix(f32, f32, f32, f32);
 
-impl fmt::Display for Matrix {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "( {} {} )\n( {} {} )", self.0, self.1, self.2, self.3)
-    }
-}
-
-fn transpose(m: Matrix) -> Matrix {
-    Matrix(m.0, m.2, m.1, m.3)
-}
-
 fn main() {
     let long_tuple = (
         1u8, 2u16, 3u32, 4u64, -1i8, -2i16, -3i32, -4i64, 0.1f32, 0.2f64, 'a', true,
@@ -45,8 +33,4 @@ fn main() {
 
     let matrix = Matrix(1.1, 1.2, 2.1, 2.2);
     println!("{:?}", matrix);
-    println!("{}", matrix);
-
-    println!("Matrix:\n{}", matrix);
-    println!("Transpose:\n{}", transpose(matrix));
 }