Turbofish syntax is the ::<> notation in Rust used to explicitly define generic type parameters when the compiler cannot infer them.
Turbofish syntax is the ::<Type> notation used in Rust to explicitly specify generic type parameters when calling a function or method. It is named for the shape of the symbol ::<> and is required when the compiler cannot infer the types automatically.
let v = Vec::<i32>::new();
let result: Result<i32, _> = "42".parse::<i32>();
let x = Some::<String>("hello".to_string());
Turbofish syntax is a way to tell Rust exactly what data type you want to use when the code isn't specific enough on its own. Think of it like adding a label to a generic box so the system knows exactly what kind of item goes inside. You use it when you need to be precise about types in complex situations where the computer can't guess correctly.