onigiri

onigiri is the tool of handling chars in Rust.
The japanese name of rice ball is "Onigiri".
In my image, a grain of rice is char.
And what collected them is chars.
And the seasoning of it is each structure of onigiri::tools.
Sep 13 2018, I remove some structs.
Instead of them, I added new function cast.
Sep 3 2018, I add new struct Vvc. However, I didn't changed the previous functions. Although it may be a few, someone may already be using it. I'm doing my best to develop that it can be used more easily and clearly.
Usage
You add onigiri in Cargo.toml.
[dependencies]
onigiri = "0.1.5"
example is as follows.
extern crate onigiri;
use onigiri::tools;
fn main() {
let test_text = "(13 + 2)".to_string();
let new_vvchar = onigiri::tools::create_vvchar(&test_text);
assert_eq!(&new_vvchar, &vec![vec!['(', '1','3'],vec!['+'],vec!['2', ')']]);
let thirteen = &new_vvchar[0][1..].to_vec();
assert_eq!(onigiri::validator::is_positive_number(&thirteen), true);
let num = onigiri::tools::cast::<u8>(&thirteen);
assert_eq!(&num, &Some(13_u8));
assert_eq!(&num.unwrap() + 2, 15_u8);
}