rustsbi/prototyper/src/macros.rs

// Ref: rcore-console crate

#[allow(unused)]
macro_rules! print {
    ($($arg:tt)*) => {
        use core::fmt::Write;
        if unsafe {$crate::board::BOARD.have_console()} {
            let console = unsafe { $crate::board::BOARD.sbi.console.as_mut().unwrap() };
            console.write_fmt(core::format_args!($($arg)*)).unwrap();
            drop(console);
        }
    }
}

#[allow(unused)]
macro_rules! println {
    () => ($crate::print!("\n"));
    ($($arg:tt)*) => {{
        use core::fmt::Write;
        if unsafe {$crate::board::BOARD.have_console()} {
            let console = unsafe { $crate::board::BOARD.sbi.console.as_mut().unwrap() };
            console.write_fmt(core::format_args!($($arg)*)).unwrap();
            console.write_char('\n').unwrap();
        }
    }}
}