Macro std::eprintln

macro_rules! eprintln {
    () => { ... };
    ($($arg:tt)*) => { ... };

Macro for printing to the standard error, with a newline.

Equivalent to the println! macro, except that output goes to io::stderr instead of io::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 if writing to io::stderr fails.


eprintln!("Error: Could not complete task");

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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.