src/test/ui/rust-2018/uniform-paths/macro-rules.rs

   1 // edition:2018
   2
   3 #![feature(decl_macro)]
   4
   5 mod m1 {
   6     // Non-exported legacy macros are treated as `pub(crate)`.
   7     macro_rules! legacy_macro { () => () }
   8
   9     use legacy_macro as _; // OK
  10     pub(crate) use legacy_macro as _; // OK
  11     pub use legacy_macro as _; //~ ERROR `legacy_macro` is only public within the crate, and cannot be re-exported outside
  12 }
  13
  14 mod m2 {
  15     macro_rules! legacy_macro { () => () }
  16
  17     #[allow(non_camel_case_types)]
  18     type legacy_macro = u8;
  19
  20     // Legacy macro imports don't prevent names from other namespaces from being imported.
  21     use legacy_macro as _; // OK
  22 }
  23
  24 mod m3 {
  25     macro legacy_macro() {}
  26
  27     fn f() {
  28         macro_rules! legacy_macro { () => () }
  29
  30         // Legacy macro imports create ambiguities with other names in the same namespace.
  31         use legacy_macro as _; //~ ERROR `legacy_macro` is ambiguous
  32     }
  33 }
  34
  35 mod exported {
  36     // Exported legacy macros are treated as `pub`.
  37     #[macro_export]
  38     macro_rules! legacy_macro { () => () }
  39
  40     pub use legacy_macro as _; // OK
  41 }
  42
  43 fn main() {}