Macro exmex::format_exerr

macro_rules! format_exerr {
    ($s:literal, $( $exps:expr ),*) => { ... };
}

Creates an ExError with a formatted message.

use exmex::{format_exerr, ExError};
assert_eq!(format_exerr!("some error {}", 1), ExError::new(format!("some error {}", 1).as_str()));