rust/tests/ui/variance/variance-regions-unused-direct.rs
2023-01-11 09:32:08 +00:00

16 lines
306 B
Rust

// Test that disallow lifetime parameters that are unused.
use std::marker;
struct Bivariant<'a>; //~ ERROR parameter `'a` is never used
struct Struct<'a, 'd> { //~ ERROR parameter `'d` is never used
field: &'a [i32]
}
trait Trait<'a, 'd> { // OK on traits
fn method(&'a self);
}
fn main() {}