diff options
Diffstat (limited to 'src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes')
3 files changed, 43 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock new file mode 100644 index 000000000..e8007a19b --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "chapter10" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml new file mode 100644 index 000000000..489f80967 --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "chapter10" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs new file mode 100644 index 000000000..cfafa9a6d --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/no-listing-11-generics-traits-and-lifetimes/src/main.rs @@ -0,0 +1,31 @@ +fn main() { + let string1 = String::from("abcd"); + let string2 = "xyz"; + + let result = longest_with_an_announcement( + string1.as_str(), + string2, + "Today is someone's birthday!", + ); + println!("The longest string is {}", result); +} + +// ANCHOR: here +use std::fmt::Display; + +fn longest_with_an_announcement<'a, T>( + x: &'a str, + y: &'a str, + ann: T, +) -> &'a str +where + T: Display, +{ + println!("Announcement! {}", ann); + if x.len() > y.len() { + x + } else { + y + } +} +// ANCHOR_END: here |