Macro si_trace_print::e

macro_rules! e {
    (
        $($args:tt)*
    ) => { ... };
}

eprintln!

For completeness, wrap eprintln!.

use si_trace_print::{efn, efx};
use si_trace_print::e;
fn func1() {
    e!("hello");
}
fn main() {
    efn!();
    func1();
    efx!();
}

prints

→main:
hello
←main: