src/lib.rs

#[macro_export]
#[doc(hidden)]
macro_rules! __unwrap {
    ($expr:expr) => {{
        #[cfg(debug_assertions)]
        #[allow(unused_unsafe)]
        unsafe {
            $expr.unwrap()
        }
        #[cfg(not(debug_assertions))]
        unsafe {
            $expr.unwrap_unchecked()
        }
    }};
}

#[macro_export]
#[doc(hidden)]
macro_rules! __unwrap_panic {
    ($result:expr) => {
        match $result {
            ::core::result::Result::Ok(t) => t,
            ::core::result::Result::Err(e) => $crate::__panic(&e),
        }
    };
}

#[inline(never)]
#[cold]
#[doc(hidden)]
pub fn __panic(error: &dyn ::core::fmt::Display) -> ! { ::core::panic!("{error}") }

#[macro_export]
#[doc(hidden)]
macro_rules! __unreachable {
    () => {{
        #[cfg(debug_assertions)]
        {
            unreachable!()
        }
        #[cfg(not(debug_assertions))]
        unsafe {
            ::core::hint::unreachable_unchecked()
        }
    }};
}

#[macro_export]
#[doc(hidden)]
macro_rules! __cold_path {
    () => {
        ::core::hint::cold_path()
    };
}

pub const LF: &[u8] = b"\n";

#[macro_export]
#[doc(hidden)]
macro_rules! __print {
    ($expr:expr) => {
        $crate::_print($expr.as_bytes())
    };
}

#[macro_export]
#[doc(hidden)]
macro_rules! __println {
    () => {
        $crate::_print($crate::LF)
    };
    ($expr:expr) => {
        $crate::_print($expr.as_bytes());
        $crate::_print($crate::LF);
    };
}

#[macro_export]
#[doc(hidden)]
macro_rules! __eprint {
    ($expr:expr) => {
        $crate::_eprint($expr.as_bytes())
    };
}

#[macro_export]
#[doc(hidden)]
macro_rules! __eprintln {
    () => {
        $crate::_eprint($crate::LF)
    };
    ($expr:expr) => {
        $crate::_eprint($expr.as_bytes());
        $crate::_eprint($crate::LF);
    };
}

fn print_to<T>(bytes: &'_ [u8], global_s: fn() -> T, label: &str)
where
    T: std::io::Write,
{
    if let Err(e) = global_s().write_all(bytes) {
        panic!("failed printing to {label}: {e}");
    }
}

#[doc(hidden)]
#[inline]
pub fn _print(bytes: &'_ [u8]) { print_to(bytes, std::io::stdout, "stdout"); }

#[doc(hidden)]
#[inline]
pub fn _eprint(bytes: &'_ [u8]) { print_to(bytes, std::io::stderr, "stderr"); }