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pub use std::io::Write; macro_rules! create_std_macros { ($src:expr, $name:ident, $nameln:ident) => { #[macro_export] macro_rules! $name { ($str:expr) => { $src.write_all($str.as_bytes()).unwrap(); $src.flush().unwrap() } } #[macro_export] macro_rules! $nameln { ($str:expr) => { let mut s = String::with_capacity($str.len() + 1); s.push_str($str); s.push('\n'); $name!(s); } } } } create_std_macros!(std::io::stdout(), stdout, stdoutln); create_std_macros!(std::io::stderr(), stderr, stderrln); #[test] fn it_works() { stdout!("Hello "); stdoutln!("World"); stderrln!("ERROR! (not really though)"); }