src/formula/boolean.rs


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use std::{ops::Deref, str::FromStr};

use crate::formula::Formula;

pub enum Boolean {
	Yes,
	No,
}

impl FromStr for Boolean {
	type Err = String;

	fn from_str(raw: &str) -> Result<Self, Self::Err> {
		match raw.to_lowercase().as_ref() {
			"" | "true" | "yes" => Ok(Self::Yes),
			"false" | "no" => Ok(Self::No),
			str => Err(format!("'{str}' is not a boolean value. try yes/no")),
		}
	}
}

impl Deref for Boolean {
	type Target = bool;

	fn deref(&self) -> &Self::Target {
		match self {
			Self::Yes => &true,
			Self::No => &false,
		}
	}
}

pub struct BooleanFormula;
impl BooleanFormula {
	pub fn new() -> Self {
		Self {}
	}
}

impl From<BooleanFormula> for Formula<Boolean> {
	fn from(_value: BooleanFormula) -> Self {
		Formula::new("failed to parse [opt] as a boolean")
	}
}