code.rs

1use crate::core::error::{value_error, Error, Result};2use serde::{Deserialize, Serialize};3use std::fmt;4use std::str::FromStr;56/// The bitmask of filled corners that names a design.7///8/// It prints, parses and serialises as the bare decimal number.9///10/// ```11/// use mrlyrs::math::bang::Code;12/// assert_eq!(Code::from(402u64).to_string(), "402");13/// assert_eq!("402".parse::<Code>().unwrap().get(), 402);14/// ```15#[derive(16    Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Default, Serialize, Deserialize,17)]18#[serde(transparent)]19pub struct Code(pub(crate) u128);2021impl Code {22    /// Returns the bitmask the code carries.23    pub const fn get(self) -> u128 {24        self.025    }26}2728impl fmt::Display for Code {29    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {30        write!(f, "{}", self.0)31    }32}3334impl FromStr for Code {35    type Err = Error;36    fn from_str(text: &str) -> Result<Code> {37        match text.parse() {38            Ok(bits) => Ok(Code(bits)),39            Err(_) => value_error(format!("code {text:?} is not a decimal number.")),40        }41    }42}4344impl From<u64> for Code {45    fn from(bits: u64) -> Code {46        Code(bits as u128)47    }48}4950impl From<u128> for Code {51    fn from(bits: u128) -> Code {52        Code(bits)53    }54}5556impl From<Code> for u128 {57    fn from(code: Code) -> u128 {58        code.059    }60}6162#[cfg(test)]63mod tests {64    use super::*;65    #[test]66    fn a_code_is_the_bare_decimal_number_in_every_form() {67        let code = Code::from(402u64);68        assert_eq!(code.to_string(), "402");69        assert_eq!(serde_json::to_string(&code).unwrap(), "402");70        assert_eq!(serde_json::from_str::<Code>("402").unwrap(), code);71        assert_eq!("402".parse::<Code>().unwrap(), code);72        assert!("x".parse::<Code>().is_err());73    }74}