src/tools/clippy/tests/ui/crate_in_macro_def.rs

   1 // run-rustfix
   2 #![warn(clippy::crate_in_macro_def)]
   3
   4 mod hygienic {
   5     #[macro_export]
   6     macro_rules! print_message_hygienic {
   7         () => {
   8             println!("{}", $crate::hygienic::MESSAGE);
   9         };
  10     }
  11
  12     pub const MESSAGE: &str = "Hello!";
  13 }
  14
  15 mod unhygienic {
  16     #[macro_export]
  17     macro_rules! print_message_unhygienic {
  18         () => {
  19             println!("{}", crate::unhygienic::MESSAGE);
  20         };
  21     }
  22
  23     pub const MESSAGE: &str = "Hello!";
  24 }
  25
  26 mod unhygienic_intentionally {
  27     // For cases where the use of `crate` is intentional, applying `allow` to the macro definition
  28     // should suppress the lint.
  29     #[allow(clippy::crate_in_macro_def)]
  30     #[macro_export]
  31     macro_rules! print_message_unhygienic_intentionally {
  32         () => {
  33             println!("{}", crate::CALLER_PROVIDED_MESSAGE);
  34         };
  35     }
  36 }
  37
  38 #[macro_use]
  39 mod not_exported {
  40     macro_rules! print_message_not_exported {
  41         () => {
  42             println!("{}", crate::not_exported::MESSAGE);
  43         };
  44     }
  45
  46     pub const MESSAGE: &str = "Hello!";
  47 }
  48
  49 fn main() {
  50     print_message_hygienic!();
  51     print_message_unhygienic!();
  52     print_message_unhygienic_intentionally!();
  53     print_message_not_exported!();
  54 }
  55
  56 pub const CALLER_PROVIDED_MESSAGE: &str = "Hello!";