///! Atomio - parse molecular formula
///!
///! `atomio` uses [pest.rs](https://pest.rs/) to parse molecular formulae like CH3, CuSO4.5H20 and
///! more.
///!
///! ## Example:
///! ```rs
///! use atomio::{parser::Parsed,element_group::Unit};
///!
///! let parsed = Parsed::from_str("CH4");
///! assert!(parsed.root_group, Unit::ElementGroup {count:1, units: vec![
///! Unit::Element { count: 1, symbol: "C".into() },
///! Unit::Element { count: 4, symbol: "H".into() }
///! ]})
///!
///! ```
///! Module with `Unit` enum and related functions.
use crateParsed;
use io;