I am trying to figure out how to declare a variable locally and use it in a value that is being returned. The following is the code that is causing the problem
use std::io;
use std::string::String;
use std::io::Write; // Used for flush implicitly
use topping::Topping;
pub fn read_line(stdin: io::Stdin, prompt: &str) -> String {
print!("{}", prompt);
let _ = io::stdout().flush();
let mut result = String::new();
let _ = stdin.read_line(&mut result);
return result;
}
pub fn handle_topping<'a>(stdin: io::Stdin) -> Topping<'a>{
let name = read_line(stdin, "Topping name: ");
//let price = read_line(stdin, "Price: ");
return Topping {name: &name, price: 0.7, vegetarian: false};
}
I have the following struct as a helper
pub struct Topping<'a> {
pub name: &'a str,
pub vegetarian: bool,
pub price: f32,
}
The compiler throws the following error
error: `name` does not live long enough
--> src/helpers.rs:17:28
|
17 | return Topping {name: &name, price: 0.7, vegetarian: false};
| ^^^^ does not live long enough
18 | }
| - borrowed value only lives until here
|
note: borrowed value must be valid for the lifetime 'a as defined on the body at 14:58...
--> src/helpers.rs:14:59
|
14 | pub fn handle_topping<'a>(stdin: io::Stdin) -> Topping<'a>{
| ___________________________________________________________^ starting here...
15 | | let name = read_line(stdin, "Topping name: ");
16 | | //let price = read_line(stdin, "Price: ");
17 | | return Topping {name: &name, price: 0.7, vegetarian: false};
18 | | }
| |_^ ...ending here
I don't particularly want to change the struct, would much rather get some advice on what it is that I am not understanding.
