macro_rules! eprintln {
    () => { ... };
    ($fmt:expr) => { ... };
    ($fmt:expr, $($arg:tt)*) => { ... };
}
Expand description

Prints to the standard error of the host, with a newline.

Equivalent to the println! macro, except that output goes to stderr of the host instead of stdout. See println! for example usage.

Use eprintln! only for error and progress messages. Use println! instead for the primary output of your program.

Panics

Panics if writing to the host fails.