core::write!

macro_rules! write {
    ($dst:expr, $($arg:tt)*) => ($dst.write_fmt(format_args!($($arg)*)))
}

Use the format! syntax to write data into a buffer of type &mut Write. See std::fmt for more information.

Examples

fn main() { use std::io::Write; let mut w = Vec::new(); write!(&mut w, "test").unwrap(); write!(&mut w, "formatted {}", "arguments").unwrap(); }

use std::io::Write;

let mut w = Vec::new();
write!(&mut w, "test").unwrap();
write!(&mut w, "formatted {}", "arguments").unwrap();