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2 Replies to "How to define higher-order functions in Rust"
Thanks for a great article. In python I can pass a method that is bound to an object. Can I do the equivalent in rust?
Hello Giles. A method in Rust is just a function, which also takes a first `self` parameter (similarly to Python). Hence, passing a method is just a matter of using the right types in the function signatures:
pub struct Greeter {
greeting: String
}
impl Greeter {
fn greet(&self, name: String) -> String {
return format!(“{}, {}”, self.greeting, name);
}
}
fn call(name: String, fun: fn(&Greeter, String) -> String) -> String {
let greeter = Greeter { greeting: “Hello”.to_string() };
return fun(&greeter, name);
}
fn main() {
println!(“{}”, call(“Giles”.to_string(), Greeter::greet));
}