src/test/ui/hygiene/fields-move.rs

// issue #46314

#![feature(decl_macro)]

#[derive(Debug)]
struct NonCopy(String);

struct Foo {
    x: NonCopy,
}

macro copy_modern($foo: ident) {
   $foo.x
}

macro_rules! copy_legacy {
    ($foo: ident) => {
        $foo.x //~ ERROR use of moved value: `foo.x`
    }
}

fn assert_two_copies(a: NonCopy, b: NonCopy) {
   println!("Got two copies: {:?}, {:?}", a, b);
}

fn main() {
    let foo = Foo { x: NonCopy("foo".into()) };
    assert_two_copies(copy_modern!(foo), foo.x); //~ ERROR use of moved value: `foo.x`
    assert_two_copies(copy_legacy!(foo), foo.x); //~ ERROR use of moved value: `foo.x`
}