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#![warn(clippy::unwrap_used, clippy::expect_used)]
#![allow(clippy::unnecessary_literal_unwrap)]
#![feature(never_type)]
use std::convert::Infallible;
trait OptionExt {
type Item;
fn unwrap_err(self) -> Self::Item;
fn expect_err(self, msg: &str) -> Self::Item;
}
impl<T> OptionExt for Option<T> {
type Item = T;
fn unwrap_err(self) -> T {
panic!();
}
fn expect_err(self, msg: &str) -> T {
panic!();
}
}
fn main() {
Some(3).unwrap();
//~^ ERROR: used `unwrap()` on an `Option` value
Some(3).expect("Hello world!");
//~^ ERROR: used `expect()` on an `Option` value
// Don't trigger on unwrap_err on an option
Some(3).unwrap_err();
Some(3).expect_err("Hellow none!");
// Issue #11245: The `Err` variant can never be constructed so do not lint this.
let x: Result<(), !> = Ok(());
x.unwrap();
x.expect("is `!` (never)");
let x: Result<(), Infallible> = Ok(());
x.unwrap();
x.expect("is never-like (0 variants)");
let a: Result<i32, i32> = Ok(3);
a.unwrap();
//~^ ERROR: used `unwrap()` on a `Result` value
a.expect("Hello world!");
//~^ ERROR: used `expect()` on a `Result` value
a.unwrap_err();
//~^ ERROR: used `unwrap_err()` on a `Result` value
a.expect_err("Hello error!");
//~^ ERROR: used `expect_err()` on a `Result` value
}
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