>write!(f, "({}, {})", self.0, self.1)
>}
>}
>// Define a structure where the fields are nameable for comparison.
>#[derive(Debug)]
>struct Point2D {
>x: f64,
>y: f64,
>}
>// Similarly, implement `Display` for `Point2D`
>impl fmt::Display for Point2D {
>fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
>// Customize so only `x` and `y` are denoted.
>write!(f, "x: {}, y: {}", self.x, self.y)
>}
>}
>fn main() {
>let minmax = MinMax(0, 14);
>println!("Compare structures:");
>println!("Display: {}", minmax);
>println!("Debug: {:?}", minmax);
>let big_range = MinMax(-300, 300);
>let small_range = MinMax(-3, 3);
>println!("The big range is {big} and the small is {small}",
>small = small_range,
>big = big_range);
>let point = Point2D { x: 3.3, y: 7.2 };
>println!("Compare points:");
>println!("Display: {}", point);
>println!("Debug: {:?}", point);
>// Error. Both `Debug` and `Display` were implemented, but `{:b}`
>// requires `fmt::Binary` to be implemented. This will not work.
>// println!("What does Point2D look like in binary: {:b}?", point);
>}
>הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
So, fmt::Display has been implemented but fmt::Binary has not, and therefore cannot be used. std::fmt has many such traits and each requires its own implementation. This is detailed further in std::fmt.
