mirror of https://github.com/rust-lang/rust
31 lines
609 B
Rust
31 lines
609 B
Rust
// issue #46314
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#![feature(decl_macro)]
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#[derive(Debug)]
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struct NonCopy(String);
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struct Foo {
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x: NonCopy,
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}
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macro copy_modern($foo: ident) {
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$foo.x
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}
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macro_rules! copy_legacy {
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($foo: ident) => {
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$foo.x //~ ERROR use of moved value: `foo.x`
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}
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}
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fn assert_two_copies(a: NonCopy, b: NonCopy) {
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println!("Got two copies: {:?}, {:?}", a, b);
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}
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fn main() {
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let foo = Foo { x: NonCopy("foo".into()) };
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assert_two_copies(copy_modern!(foo), foo.x); //~ ERROR use of moved value: `foo.x`
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assert_two_copies(copy_legacy!(foo), foo.x); //~ ERROR use of moved value: `foo.x`
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}
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