File: variance-unused-region-param.rs

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rustc 1.85.0%2Bdfsg3-1
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// Test that we report an error for unused type parameters in types.

struct SomeStruct<'a> { x: u32 } //~ ERROR parameter `'a` is never used
enum SomeEnum<'a> { Nothing } //~ ERROR parameter `'a` is never used
trait SomeTrait<'a> { fn foo(&self); } // OK on traits.

fn main() {}