fixed_len_str

This Rust library provides a procedural macro for declare a wrapper struct for an array with the size given by the tokens which dereferences to str and a macro for create they from str.

For a proper API documentation of one of length 12 see fixed_len_str_example.

If you want to use serde to serialize and deserialize the fixed_len_str use the serde_support feature and if you want the documentation visible at the expansion use default-features = false.

Usage

use fixed_len_str::fixed_len_str;

fixed_len_str!(3);

fn main() {
    let string = FixedStr3::from("abc");
    
    assert_eq!(string, "abc");
    
    let string = FixedStr3::new(*b"abc");
    
    assert_eq!(string, "abc");
    
    let mut string = FixedStr3::default(); // equivalent to mem::zeroed but safe
    string.fill_zeroes_str("abc");
    
    assert_eq!(string, "abc");
    
    let mut string = FixedStr3::new([b'a', b'b', 0]);
    assert_eq!(string, "ab");
    string.fill_zeroes_char('c');
    
    assert_eq!(string, "abc");
    assert_eq!(string.as_bytes(), string.as_ref().as_bytes()); // this is only certain with non-zero bytes
    assert_eq!(string.clone().into_string(), String::from(string.as_ref())); // clone or consume at your option
    assert_eq!(FixedStr3::from_vec(Vec::new()).as_ref(), "");
}