21 lines
400 B
Rust
21 lines
400 B
Rust
#![allow(dead_code)]
|
|
#![allow(unused_variables)]
|
|
#![allow(non_snake_case)]
|
|
#![deny(unreachable_patterns)]
|
|
|
|
enum Stack<T> {
|
|
Nil,
|
|
Cons(T, Box<Stack<T>>)
|
|
}
|
|
|
|
fn is_empty<T>(s: Stack<T>) -> bool {
|
|
match s {
|
|
Nil => true,
|
|
//~^ WARN pattern binding `Nil` is named the same as one of the variants of the type `Stack`
|
|
_ => false
|
|
//~^ ERROR unreachable pattern
|
|
}
|
|
}
|
|
|
|
fn main() {}
|