feat: Add traits4.rs exercise

This commit is contained in:
Sam White 2022-02-25 16:41:10 +00:00 committed by mokou
parent f43c6d7877
commit 599d634ee2
2 changed files with 55 additions and 0 deletions

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@ -0,0 +1,44 @@
// traits4.rs
//
// Your task is to replace the '??' sections so the code compiles.
// Don't change any line other than 21.
// I AM NOT DONE
pub trait Licensed {
fn licensing_info(&self) -> String {
"some information".to_string()
}
}
struct SomeSoftware {}
struct OtherSoftware {}
impl Licensed for SomeSoftware {}
impl Licensed for OtherSoftware {}
fn compare_license_types(software: ??, software_two: ??) -> bool {
software.licensing_info() == software_two.licensing_info()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn compare_license_information() {
let some_software = SomeSoftware {};
let other_software = OtherSoftware {};
assert!(compare_license_types(some_software, other_software));
}
#[test]
fn compare_license_information_backwards() {
let some_software = SomeSoftware {};
let other_software = OtherSoftware {};
assert!(compare_license_types(other_software, some_software));
}
}

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@ -716,6 +716,17 @@ implement the function themselves.
See the documentation at: https://doc.rust-lang.org/book/ch10-02-traits.html#default-implementations
"""
[[exercises]]
name = "traits4"
path = "exercises/traits/traits4.rs"
mode = "test"
hint = """
Instead of using concrete types as parameters you can use traits. Try replacing the
'??' with 'impl <what goes here?>'
See the documentation at: https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
"""
# QUIZ 3
[[exercises]]