diff options
Diffstat (limited to 'src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05')
4 files changed, 52 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.lock new file mode 100644 index 000000000..e8007a19b --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/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/listing-10-05/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/Cargo.toml new file mode 100644 index 000000000..489f80967 --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/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/listing-10-05/output.txt b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt new file mode 100644 index 000000000..1a705ed57 --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/output.txt @@ -0,0 +1,17 @@ +$ cargo run + Compiling chapter10 v0.1.0 (file:///projects/chapter10) +error[E0369]: binary operation `>` cannot be applied to type `&T` + --> src/main.rs:5:17 + | +5 | if item > largest { + | ---- ^ ------- &T + | | + | &T + | +help: consider restricting type parameter `T` + | +1 | fn largest<T: std::cmp::PartialOrd>(list: &[T]) -> &T { + | ++++++++++++++++++++++ + +For more information about this error, try `rustc --explain E0369`. +error: could not compile `chapter10` due to previous error diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs new file mode 100644 index 000000000..df33743f7 --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-05/src/main.rs @@ -0,0 +1,23 @@ +fn largest<T>(list: &[T]) -> &T { + let mut largest = &list[0]; + + for item in list { + if item > largest { + largest = item; + } + } + + largest +} + +fn main() { + let number_list = vec![34, 50, 25, 100, 65]; + + let result = largest(&number_list); + println!("The largest number is {}", result); + + let char_list = vec!['y', 'm', 'a', 'q']; + + let result = largest(&char_list); + println!("The largest char is {}", result); +} |