Macro si_trace_print::en

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

eprintln! when entering.

To signify entering a function. Use this as the first eprintln! in a function.

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

prints

→main:
    →hello
←main:

Uses sn().