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rustbyexample/primitives/primitives_tuples.rs
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@ -1,5 +1,3 @@
use std::fmt;
fn reverse(pair: (i32, bool)) -> (bool, i32) { fn reverse(pair: (i32, bool)) -> (bool, i32) {
let (integer, boolean) = pair; let (integer, boolean) = pair;
(boolean, integer) (boolean, integer)
@ -8,16 +6,6 @@ fn reverse(pair: (i32, bool)) -> (bool, i32) {
#[derive(Debug)] #[derive(Debug)]
struct Matrix(f32, f32, f32, f32); 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() { fn main() {
let long_tuple = ( let long_tuple = (
1u8, 2u16, 3u32, 4u64, -1i8, -2i16, -3i32, -4i64, 0.1f32, 0.2f64, 'a', true, 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); let matrix = Matrix(1.1, 1.2, 2.1, 2.2);
println!("{:?}", matrix); println!("{:?}", matrix);
println!("{}", matrix);
println!("Matrix:\n{}", matrix);
println!("Transpose:\n{}", transpose(matrix));
} }