一个return语句，也称为早期返回，将从最后/最里面的类函数作用域返回一个对象。（类函数是因为它同时...
一个return语句，也称为早期返回，将从最后/最里面的类函数作用域返回一个对象。（类函数是因为它同时...
}#[derive(Clone,Debug)]pubenumKeyABRef<'a> {A(&'ausize),B(&'aString), }implKeyValforEnumAB{typeKey= KeyAB;// type KeyRef<'_> = KeyABRef<'_>fnget_key(&self)->Self::Key {matchself{ &EnumAB::A(refa) => KeyAB::A(a.get_key()), &EnumAB::B(refb) => ...
With error codes, it can really be very simply solved by a single match or if let statement and then a call to exit() manually. It may turn out to be good to implement this, or not, I'm just here stating my opinion from my experience working with creating programs in rust. Contribu...
program-entry-pointrustrust-result 我正在阅读《Rust by Examples》一书。在此示例中,删除returninErr(e) => return Err(e)会导致错误:expected `i32`, found enum `Result``。这是为什么? Err(e) => return Err(e)和 和有什么区别Err(e) => Err(e)?
unwrap_or_return { ( $e:expr ) => { match $e { Ok(x) => x, Err(_) => return, } } } fn callable(param: &mut i32) -> Result<i32, ()> { Ok(*param) } fn main() { let mut param = 0; let res = unwrap_or_return!(callable(&mut param)); println!("...
RIPRust in Peace RIPReceptor-Interacting Protein(cell apoptosis) RIPRespiratory Inductance Plethysmography(pulmonary ventilation) RIPRegulation of Investigatory Powers(commerce regulations, UK) RIPRéseaux d'Initiative Publique(French: Public Initiative Network) ...
Vaquer is originally from Chile, but she has primarily made a name for herself in Mexico, wrestling for CMLL. Two weeks ago, Vaquer faced Mercedes Moné at the joint AEW-NJPW Forbidden Door pay-per-view in a champion vs. champion match. Vaquer dropped the NJPW Strong w...
While taking a look at Rust I noticed a behavior I do not quite understand.I've got this code, which works as expected:fn get_or_create_foo(v: &mut Vec<String>) -> String { match v.get(0) { Some(x) => return x.clone(), None => () } println!("creating foo"); v.pus...
Rust does not assume that multiplication of to values of type T always results in a new value of type T. Instead, the Mul trait has an associated type Output that specifies the return type of the multiplication. The error message mentions that type as "found associated type <T as std::...