std::macros::write

macro_rules! write(
    ($dst:expr, $($arg:tt)*) => ({
        let dst: &mut ::std::io::Writer = $dst;
        format_args!(|args| { ::std::fmt::write(dst, args) }, $($arg)*)
    })
)

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

Example

use std::io::MemWriter;

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