feat: Add traits3.rs exercise
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exercises/traits/traits3.rs
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40
exercises/traits/traits3.rs
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// traits3.rs
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//
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// Your task is to implement the Licensed trait for
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// both structures and have them return the same
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// information without writing the same function twice.
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//
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// Consider what you can add to the Licensed trait.
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// I AM NOT DONE
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pub trait Licensed {
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fn licensing_info(&self) -> String;
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}
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struct SomeSoftware {
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version_number: i32,
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}
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struct OtherSoftware {
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version_number: String,
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}
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impl Licensed for SomeSoftware {} // Don't edit this line
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impl Licensed for OtherSoftware {} // Don't edit this line
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn is_licensing_info_the_same() {
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let licensing_info = String::from("Some information");
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let some_software = SomeSoftware { version_number: 1 };
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let other_software = OtherSoftware {
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version_number: "v2.0.0".to_string(),
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};
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assert_eq!(some_software.licensing_info(), licensing_info);
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assert_eq!(other_software.licensing_info(), licensing_info);
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}
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}
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12
info.toml
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info.toml
@ -704,6 +704,18 @@ what the result should look like!
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Vectors provide suitable methods for adding an element at the end. See
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the documentation at: https://doc.rust-lang.org/std/vec/struct.Vec.html"""
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[[exercises]]
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name = "traits3"
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path = "exercises/traits/traits3.rs"
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mode = "test"
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hint = """
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Traits can have a default implementation for functions. Structs that implement
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the trait can then use the default version of these functions if they choose not
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implement the function themselves.
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See the documentation at: https://doc.rust-lang.org/book/ch10-02-traits.html#default-implementations
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"""
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# QUIZ 3
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[[exercises]]
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