I'm trying to use the code I found here with some problems, basically it's a borrowing error using some macros, the error:
Compiling playground v0.0.1 (file:///playground)
error[E0597]: `body` does not live long enough
--> src/main.rs:12:3
|
6 | let raw_structure = borrow_function(&body);
| ---- borrow occurs here
...
12 | }
| ^ `body` dropped here while still borrowed
...
31 | let body = get_body_as!(&str, "Hello", function1);
| -------------------------------------- in this macro invocation
32 | println!("Hello");
33 | }
| - borrowed value needs to live until here
I manage to create a Minimal, Complete, and Verifiable example, I was thinking that a solution would be to transform the macros into functions, but I'm not completely sure how to do that either (Playground ):
macro_rules! get_body_as {
($structure:ty, $req:expr, $error_fn:ident) => {
{
let body = get_body!($req, $error_fn);
let raw_structure = borrow_function(&body);
match raw_structure {
Ok(structure) => structure,
Err(error) => "Error"
}
}
}
}
macro_rules! get_body {
($req:expr, $error_fn:ident) => {
{
let mut payload = String::new();
payload
}
}
}
fn borrow_function(s: &str) -> Result<&str, &str> {
Ok(s)
}
fn main() {
let function1 = |s: &str| s;
let body = get_body_as!(&str, "Hello", function1);
println!("Hello");
}