diff options
Diffstat (limited to 'src/libstd/macros.rs')
| -rw-r--r-- | src/libstd/macros.rs | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs index 995544c49a4..e1ef3062794 100644 --- a/src/libstd/macros.rs +++ b/src/libstd/macros.rs @@ -60,19 +60,21 @@ macro_rules! panic { }); } +/// Macro for printing to the standard output. +/// /// Equivalent to the `println!` macro except that a newline is not printed at /// the end of the message. #[macro_export] #[stable(feature = "rust1", since = "1.0.0")] +#[allow_internal_unstable] macro_rules! print { - ($($arg:tt)*) => ($crate::old_io::stdio::print_args(format_args!($($arg)*))) + ($($arg:tt)*) => ($crate::io::_print(format_args!($($arg)*))); } -/// Macro for printing to a task's stdout handle. +/// Macro for printing to the standard output. /// -/// Each task can override its stdout handle via `std::old_io::stdio::set_stdout`. -/// The syntax of this macro is the same as that used for `format!`. For more -/// information, see `std::fmt` and `std::old_io::stdio`. +/// Use the `format!` syntax to write data to the standard output. +/// See `std::fmt` for more information. /// /// # Examples /// @@ -83,7 +85,8 @@ macro_rules! print { #[macro_export] #[stable(feature = "rust1", since = "1.0.0")] macro_rules! println { - ($($arg:tt)*) => ($crate::old_io::stdio::println_args(format_args!($($arg)*))) + ($fmt:expr) => (print!(concat!($fmt, "\n"))); + ($fmt:expr, $($arg:tt)*) => (print!(concat!($fmt, "\n"), $($arg)*)); } /// Helper macro for unwrapping `Result` values while returning early with an |