macro_rules! trace { () => { ... }; ($val:expr) => { ... }; ($val:expr $(,)?) => { ... }; ($($val:expr),+ $(,)?) => { ... }; }
Expand description
Define C-like debug trace macro: trace!()
.
use dmacro::*;
fn foo(n: usize) {
trace!(format!("n = {}", n));
// ...
trace!("ur lucky!");
}
foo(20080512usize);