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Change eprintln!()

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Address #30143 as well. `writeln!()` hasn't been changed.
This commit is contained in:
Esteban Küber 2018-07-21 15:56:37 -07:00
parent 00d500052c
commit a7a68370a7
1 changed files with 9 additions and 2 deletions
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11
src/libstd/macros.rs
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@ -217,10 +217,17 @@ macro_rules! eprint {
/// ```
#[macro_export]
#[stable(feature = "eprint", since = "1.19.0")]
#[allow_internal_unstable]
macro_rules! eprintln {
() => (eprint!("\n"));
($fmt:expr) => (eprint!(concat!($fmt, "\n")));
($fmt:expr, $($arg:tt)*) => (eprint!(concat!($fmt, "\n"), $($arg)*));
($($arg:tt)*) => ({
#[cfg(not(stage0))] {
($crate::io::_eprint(format_args_nl!($($arg)*)));
}
#[cfg(stage0)] {
eprint!("{}\n", format_args!($($arg)*))
}
})
}
#[macro_export]