rustlings/exercises/generics/generics2.rs
2020-02-28 00:09:08 +00:00

28 lines
665 B
Rust

// This powerful wrapper provides the ability to store a positive integer value.
// Rewrite it using generics so that it supports wrapping ANY type.
struct Wrapper<u32> {
value: u32
}
impl<u32> Wrapper<u32> {
pub fn new(value: u32) -> Self {
Wrapper { value }
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn store_u32_in_wrapper() {
assert_eq!(Wrapper::new(42).value, 42);
}
#[test]
fn store_str_in_wrapper() {
// TODO: Delete this assert and uncomment the one below once you have finished the exercise.
assert!(false);
// assert_eq!(Wrapper::new("Foo").value, "Foo");
}
}