diff options
Diffstat (limited to 'src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04')
3 files changed, 55 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.lock new file mode 100644 index 000000000..e8007a19b --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/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-10-04/Cargo.toml b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/Cargo.toml new file mode 100644 index 000000000..489f80967 --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/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-10-04/src/main.rs b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs new file mode 100644 index 000000000..a47e3f232 --- /dev/null +++ b/src/doc/book/listings/ch10-generic-types-traits-and-lifetimes/listing-10-04/src/main.rs @@ -0,0 +1,43 @@ +// ANCHOR: here +fn largest_i32(list: &[i32]) -> &i32 { + let mut largest = &list[0]; + + for item in list { + if item > largest { + largest = item; + } + } + + largest +} + +fn largest_char(list: &[char]) -> &char { + 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_i32(&number_list); + println!("The largest number is {}", result); + // ANCHOR_END: here + assert_eq!(*result, 100); + // ANCHOR: here + + let char_list = vec!['y', 'm', 'a', 'q']; + + let result = largest_char(&char_list); + println!("The largest char is {}", result); + // ANCHOR_END: here + assert_eq!(*result, 'y'); + // ANCHOR: here +} +// ANCHOR_END: here |