E0308 — Mismatched Types

Cause di questo errore

A function returns a different type than declared, a variable is assigned an incompatible type, or a match arm returns a different type. Rust's strict type system requires exact type matches without implicit conversions.

Come correggerlo

Convert the value to the expected type using .into(), as, or From/Into traits. Fix the return type annotation to match the actual return value. Use .to_string(), .as_str(), or other conversion methods as appropriate.

fn main() {
  let x: i32 = "hello";
}