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#![warn(clippy::crate_in_macro_def)]
mod hygienic {
#[macro_export]
macro_rules! print_message_hygienic {
() => {
println!("{}", $crate::hygienic::MESSAGE);
};
}
pub const MESSAGE: &str = "Hello!";
}
mod unhygienic {
#[macro_export]
macro_rules! print_message_unhygienic {
() => {
println!("{}", crate::unhygienic::MESSAGE);
};
}
pub const MESSAGE: &str = "Hello!";
}
mod unhygienic_intentionally {
// For cases where the use of `crate` is intentional, applying `allow` to the macro definition
// should suppress the lint.
#[allow(clippy::crate_in_macro_def)]
#[macro_export]
macro_rules! print_message_unhygienic_intentionally {
() => {
println!("{}", crate::CALLER_PROVIDED_MESSAGE);
};
}
}
#[macro_use]
mod not_exported {
macro_rules! print_message_not_exported {
() => {
println!("{}", crate::not_exported::MESSAGE);
};
}
pub const MESSAGE: &str = "Hello!";
}
fn main() {
print_message_hygienic!();
print_message_unhygienic!();
print_message_unhygienic_intentionally!();
print_message_not_exported!();
}
pub const CALLER_PROVIDED_MESSAGE: &str = "Hello!";
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