($fmt:expr, $($args:tt)*) => ({ /* compiler built-in */ });
}
- /// Internal version of [`format_args`].
- ///
- /// This macro differs from [`format_args`] in that it appends a newline to the format string
- /// and nothing more. It is perma-unstable.
- ///
- /// [`format_args`]: ../std/macro.format_args.html
- #[doc(hidden)]
- #[unstable(feature = "format_args_nl", issue="0")]
- #[macro_export]
- macro_rules! format_args_nl {
- ($fmt:expr) => ({ /* compiler built-in */ });
- ($fmt:expr, $($args:tt)*) => ({ /* compiler built-in */ });
- }
/// Inspect an environment variable at compile time.
///
/// This macro will expand to the value of the named environment variable at