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use crate::Symbolic;
use serde::{Deserialize, Serialize};
#[derive(Clone, Debug, Deserialize, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize)]
pub enum Tapes<S: Symbolic = String> {
Normal(Tape<S>),
Standard(Tape<S>),
}
impl<S: Symbolic> Tapes<S> {
pub fn normal(tape: Tape<S>) -> Self {
Self::Normal(tape)
}
pub fn standard(tape: Tape<S>) -> Self {
Self::Standard(tape)
}
}
impl<S: Symbolic> Default for Tapes<S> {
fn default() -> Self {
Self::normal(Default::default())
}
}
impl<S: Symbolic> From<Tapes<S>> for Tape<S> {
fn from(tape: Tapes<S>) -> Tape<S> {
match tape {
Tapes::Normal(t) => t,
Tapes::Standard(t) => t,
}
}
}
#[derive(Clone, Debug, Default, Deserialize, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize)]
pub struct Tape<S: Symbolic = String>(Vec<S>);
impl<S: Symbolic> Tape<S> {
pub fn new(symbols: impl IntoIterator<Item = S>) -> Self {
Self(Vec::from_iter(symbols))
}
pub fn get(&self, pos: usize) -> Option<&S> {
self.tape().get(pos)
}
pub fn insert(&mut self, pos: usize, elem: S) {
self.0.insert(pos, elem);
}
pub fn is_empty(&self) -> bool {
self.tape().is_empty()
}
pub fn len(&self) -> usize {
self.tape().len()
}
pub fn push(&mut self, elem: S) {
self.0.push(elem);
}
pub fn set(&mut self, index: usize, elem: S) {
self.0[index] = elem;
}
pub fn tape(&self) -> &Vec<S> {
&self.0
}
}
impl<S: Symbolic> From<Vec<S>> for Tape<S> {
fn from(d: Vec<S>) -> Tape<S> {
Tape::new(d)
}
}
impl<S: Symbolic> From<Tape<S>> for Vec<S> {
fn from(d: Tape<S>) -> Vec<S> {
d.tape().clone()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_tape() {
let alpha = vec!["a", "b", "c"];
let a = Tape::new(alpha);
assert_eq!(a.len(), 3);
}
}