[rustc.git] / src / test / ui / proc-macro / derive-helper-legacy-limits.rs

// Support for legacy derive helpers is limited and heuristic-based
// (that's exactly the reason why they are deprecated).

// edition:2018
// aux-build:test-macros.rs

#[macro_use]
extern crate test_macros;

use derive as my_derive;

#[my_derive(Empty)]
#[empty_helper] // OK
struct S1;

// Legacy helper detection doesn't see through `derive` renaming.
#[empty_helper] //~ ERROR cannot find attribute `empty_helper` in this scope
#[my_derive(Empty)]
struct S2;

fn main() {}
Commit	Line	Data
6a06907d XL	1	// Support for legacy derive helpers is limited and heuristic-based
	2	// (that's exactly the reason why they are deprecated).
	3
	4	// edition:2018
	5	// aux-build:test-macros.rs
	6
	7	#[macro_use]
	8	extern crate test_macros;
	9
	10	use derive as my_derive;
	11
	12	#[my_derive(Empty)]
	13	#[empty_helper] // OK
	14	struct S1;
	15
	16	// Legacy helper detection doesn't see through `derive` renaming.
	17	#[empty_helper] //~ ERROR cannot find attribute `empty_helper` in this scope
	18	#[my_derive(Empty)]
	19	struct S2;
	20
	21	fn main() {}