//- minicore: deref
struct Foo([i32; 16]);

impl core::ops::Deref$0 for Foo {
    type Target = i32;

    fn deref(&self) -> &Self::Target {
        &self.0[0]
    }
}

struct Foo([i32; 16]);

$0impl core::ops::DerefMut for Foo {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.0[0]
    }
}

impl core::ops::Deref for Foo {
    type Target = i32;

    fn deref(&self) -> &Self::Target {
        &self.0[0]
    }
}