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Implement println! using nested format_args! #987

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Merged
merged 1 commit into from
Jun 26, 2023
Merged

Implement println! using nested format_args! #987

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8 changes: 5 additions & 3 deletions kernel/app_io/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -188,8 +188,10 @@ pub fn line_discipline() -> Result<Arc<LineDiscipline>, &'static str> {
/// Calls `print!()` with an extra newline ('\n') appended to the end.
#[macro_export]
macro_rules! println {
($fmt:expr) => ($crate::print!(concat!($fmt, "\n")));
($fmt:expr, $($arg:tt)*) => ($crate::print!(concat!($fmt, "\n"), $($arg)*));
() => ($crate::print!("\n"));
($($arg:tt)*) => ({
$crate::print_to_stdout_args(::core::format_args!("{}\n", ::core::format_args!($($arg)*)));
});

}

Expand All @@ -198,7 +200,7 @@ macro_rules! println {
#[macro_export]
macro_rules! print {
($($arg:tt)*) => ({
$crate::print_to_stdout_args(format_args!($($arg)*));
$crate::print_to_stdout_args(::core::format_args!($($arg)*));
});
}

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