A library that using macro to write to io::stderr() for Rust.

Usage

Cargo.toml

toml [dependencies] stderr = "0.2.2"

or

toml [dependencies] stderr = { git = "https://github.com/biluohc/stderr", branch = "master", version = "0.2.2"}

Explain

Usage as same as print!/println!.

1. err!/errln!: Panics if writing to io::stdout() fails.
2. errst!/errstln!: Do nothing if writing to io::stdout() fails(silent->st).

Example

```rust

[macro_use]

extern crate stderr;

fn main() { println!("stderr@stdout !"); let vec = vec![1, 2, 3, 4, 5]; let s = std::env::args().nth(0).unwrap();

err!("err!(expr\\n)\n");
err!("err!(expr,tt) {}\t{:?}", s, vec);
errln!();
errln!("errln!(expr)");
for (i, x) in vec.clone().iter().enumerate() {
    errln!("errln!(expr,tt) {}: {}", i, x);
}
println!();

errst!("errst!(expr\\n)\n");
errst!("errst!(expr,tt) {}\t{:?}", s, vec);
errstln!();
errstln!("errstln!(expr)");
for (i, x) in vec.iter().enumerate() {
    errstln!("errstln!(expr,tt) {}: {}", i, x);
}

} ```