diff options
| -rw-r--r-- | exercises/16_lifetimes/lifetimes3.rs | 7 | ||||
| -rw-r--r-- | rustlings-macros/info.toml | 4 | ||||
| -rw-r--r-- | solutions/16_lifetimes/lifetimes3.rs | 19 |
3 files changed, 22 insertions, 8 deletions
diff --git a/exercises/16_lifetimes/lifetimes3.rs b/exercises/16_lifetimes/lifetimes3.rs index 9b631ca..1cc2759 100644 --- a/exercises/16_lifetimes/lifetimes3.rs +++ b/exercises/16_lifetimes/lifetimes3.rs @@ -1,16 +1,15 @@ // Lifetimes are also needed when structs hold references. +// TODO: Fix the compiler errors about the struct. struct Book { author: &str, title: &str, } fn main() { - let name = String::from("Jill Smith"); - let title = String::from("Fish Flying"); let book = Book { - author: &name, - title: &title, + author: "George Orwell", + title: "1984", }; println!("{} by {}", book.title, book.author); diff --git a/rustlings-macros/info.toml b/rustlings-macros/info.toml index e2ebfa5..f0e34a5 100644 --- a/rustlings-macros/info.toml +++ b/rustlings-macros/info.toml @@ -843,9 +843,7 @@ inner block: name = "lifetimes3" dir = "16_lifetimes" test = false -hint = """ -If you use a lifetime annotation in a struct's fields, where else does it need -to be added?""" +hint = """Let the compiler guide you :)""" # TESTS diff --git a/solutions/16_lifetimes/lifetimes3.rs b/solutions/16_lifetimes/lifetimes3.rs index 4e18198..16a5a68 100644 --- a/solutions/16_lifetimes/lifetimes3.rs +++ b/solutions/16_lifetimes/lifetimes3.rs @@ -1 +1,18 @@ -// Solutions will be available before the stable release. Thank you for testing the beta version 🥰 +// Lifetimes are also needed when structs hold references. + +struct Book<'a> { + // ^^^^ added a lifetime annotation + author: &'a str, + // ^^ + title: &'a str, + // ^^ +} + +fn main() { + let book = Book { + author: "George Orwell", + title: "1984", + }; + + println!("{} by {}", book.title, book.author); +} |