rustlings/exercises/14_generics/generics2.rs

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// This powerful wrapper provides the ability to store a positive integer value.
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// TODO: Rewrite it using a generic so that it supports wrapping ANY type.
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struct Wrapper {
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value: u32,
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}
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// TODO: Adapt the struct's implementation to be generic over the wrapped value.
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impl Wrapper {
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fn new(value: u32) -> Self {
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Wrapper { value }
}
}
fn main() {
// You can optionally experiment here.
}
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#[cfg(test)]
mod tests {
use super::*;
#[test]
fn store_u32_in_wrapper() {
assert_eq!(Wrapper::new(42).value, 42);
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}
#[test]
fn store_str_in_wrapper() {
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assert_eq!(Wrapper::new("Foo").value, "Foo");
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}
}