Reading Character by Character

You can use the relision::decoder module to iterate through a stream character by character. The decoder is based on the https://encoding.spec.whatwg.org/ and handles UTF-8 and UTF-16 little- and big-endian.

Using this is pretty simple.

use relision::decoder;
 
fn main() {
    // Copy the standard in to the standard out, one character at a time.
    let mut source = std::io::stdin();
    let decode = decoder::Decode::with_capacity(&mut source, 16);
    for ch in decode {
        println!("{}", ch);
    }
}