cellular_lib 0.1.1

#![allow(dead_code)]

use std::boxed::Box;
//use std::cell::Ref;
use std::cell::RefCell;
use std::fmt::Debug;
use std::marker::PhantomData;
use std::rc::Rc;
use std::rc::Weak;

pub mod cellular_process;
#[macro_use]
pub mod util;

/// Printer is the type of a printer function, which takes a string and prints it (to stdout, a file, whatever)
pub type Printer = Fn(&str) -> ();
/// Reader is the type of a reader function, which returns a string (from stdin, a file, whatever)
pub type Reader = Fn() -> String;

/// Trait `CellularAutomata` is a trait that all cellular automata must satisfy
pub trait CellularAutomata<
    'a,
    CellDataType: Clone + 'static + util::Newable + util::Parseable + util::Encodeable + Debug,
    MetaDataType: Clone + 'static + util::Newable + util::Parseable + cellular_process::GridMeta,
>
{
    /// Function run runs the cellular automata
    fn run(&self, _: &'a str) -> ();
    /// Function input_handler takes the grid and a reader and modifies the grid according to what it reads. The printer argument is there just so the automata can prompt the user (if needed)
    fn input_handler(
        _: &mut cellular_process::Grid<CellDataType, MetaDataType>,
        _: &Reader,
        _: &Printer,
    ) -> ();
    /// Function output_handler takes a grid and a printer and prints out something, according to the data of the grid.
    fn output_handler(_: &cellular_process::Grid<CellDataType, MetaDataType>, _: &Printer) -> ();
}

/// `DummyMetaData` is a dummy metadata struct. Use when you don't actually need your automata to be configuarable at runtime (obviously)
#[derive(Clone)]
pub struct DummyMetaData {}

/// `AdaptiveTransitionFunctionMapNode` is a "node" in the transition function map
#[derive(Clone, Debug, PartialEq)]
pub enum AdaptiveTransitionFunctionMapNode {
    TempLink(Vec<Option<Rc<RefCell<AdaptiveTransitionFunctionMapNode>>>>), // TempLink is like link, but isn't final
    End(util::UsizeWrapper), // End indicates that the chain has ended
    Link(Vec<Option<Box<AdaptiveTransitionFunctionMapNode>>>), // Link stores the next nodes
}

/// `AdaptiveTransitionFunction` is an Object that encapsulates an adaptive (dynamically configurable) transition function
#[derive(Clone, Debug)]
pub struct AdaptiveTransitionFunction {
    /// Matrix is the transition matrix - the transition function is really just a table lookup
    matrix: AdaptiveTransitionFunctionMatrix,
}

/// `AdaptiveNeighborParserNode` is a node in the neighbor function parser map
#[derive(Clone, Debug, PartialEq)]
pub enum AdaptiveNeighborParserNode {
    Relative(Vec<isize>),
    Absolute(Vec<usize>),
}

/// `AdaptiveTransitionFunctionMatrix` is the (new) object that encapsulates an adaptive
/// (dynamically configurable) transition function
#[derive(Clone, Debug)]
pub struct AdaptiveTransitionFunctionMatrix {
    matrix: Vec<Option<util::UsizeWrapper>>,
    dimensions: Vec<usize>,
}

/// `AdaptiveNeighborParser` is an Object that encapsulates an adaptive (dynamically configurable) neighbor parsing function
#[derive(Clone, Debug)]
pub struct AdaptiveNeighborParser {
    addr_matrix: Vec<AdaptiveNeighborParserNode>,
    edge_val: util::UsizeWrapper,
}

/// `AdaptiveMetaData` is your "standard" adaptive `MetaDataType`
#[derive(Clone, Debug)]
pub struct AdaptiveMetaData {
    dimensions: Vec<usize>,
    transition: AdaptiveTransitionFunction,
    neighbor_parser: AdaptiveNeighborParser,
}

/// `AdaptiveCellularAutomata` is a cellular automata that can be configured at runtime
#[derive(Clone)]
pub struct AdaptiveCellularAutomata<'a> {
    meta: AdaptiveMetaData,
    initial: Vec<util::UsizeWrapper>,
    phantom: PhantomData<&'a str>,
}

impl util::Parseable for AdaptiveTransitionFunctionMapNode {
    fn parse(input: &str) -> Self {
        let to_return = Self::temp_link();

        let input_as_string = input.to_string();
        let split_input: Vec<&str> = input_as_string.split(',').collect();
        let tokens: Vec<Vec<util::UsizeWrapper>> = {
            let mut to_return: Vec<Vec<util::UsizeWrapper>> = Vec::new();
            let dimension_count = split_input[0].split(' ').count() - 1;
            to_return.resize(dimension_count + 1, Vec::new());
            for (indx1, j) in split_input.iter().enumerate() {
                let tmp: Vec<&str> = j.split(' ').collect();
                for item in tmp {
                    to_return[indx1].push(util::Parseable::parse(item));
                }
            }
            to_return
        };
        if split_input.is_empty() {
            panic!("ERROR - error reading transition function symbol table - table is empty");
        }
        let num_dimensions = split_input[0].split(' ').count() - 1; //num_dimensions is the number of dimensions, -1 because the last token is not a dimension, but the final value

        // Perform dimension sanity checks (make sure that all inputs have the same number of dimensions)
        for j in split_input {
            let tokens: Vec<&str> = j.split(' ').collect();
            if (tokens.len() - 1) != num_dimensions {
                // Malformed input (extra dimensions inserted, dimensions missing, etc)
                panic!("ERROR - missing or extra dimension");
            }
        }

        let to_return_rc = Rc::new(RefCell::new(to_return));
        let mut old_cell_weak_ptr: Weak<RefCell<Self>> = Rc::downgrade(&to_return_rc);
        for val_1 in tokens {
            for (addr, val_2) in val_1.iter().enumerate() {
                let current_ref_cell = {
                    if addr == num_dimensions {
                        RefCell::new(AdaptiveTransitionFunctionMapNode::End(val_2.clone()))
                    } else {
                        RefCell::new(Self::temp_link())
                    }
                };
                let node: Rc<RefCell<Self>> = Rc::new(current_ref_cell);
                let tmp = {
                    if addr == 0 {
                        Rc::new(RefCell::new(Self::temp_link())) // If addr == 0, make tmp hold some garbage, it won't be used anyways
                    } else if let Some(a) = old_cell_weak_ptr.upgrade() {
                        a
                    } else {
                        panic!("Cannot borrow last processed node as mutable");
                    }
                };
                let mut data = {
                    if addr == 0 {
                        if let Ok(d) = to_return_rc.try_borrow_mut() {
                            d
                        } else {
                            panic!("Cannot borrow last processed node as mutable");
                        }
                    } else if let Ok(a) = tmp.try_borrow_mut() {
                        a
                    } else {
                        panic!("Cannot borrow last processed node as mutable");
                    }
                };
                old_cell_weak_ptr = data.add_link(&Some(val_2.clone()), Some(node));
            }
        }
        Self::solidify(
            {
                if let Ok(a) = Rc::try_unwrap(to_return_rc) {
                    a
                } else {
                    panic!("Cannot unwrap to_return_Rc");
                }
            }
            .into_inner(),
        )
    }
}

impl AdaptiveTransitionFunction {
    #[inline]
    pub fn apply(
        data: &mut util::UsizeWrapper,
        neighbor: &cellular_process::NeighborType<util::UsizeWrapper>,
        meta: &AdaptiveMetaData,
    ) {
        *data = meta
            .get_transition_function()
            .get_matrix()
            .follow_path(neighbor.get_data().as_slice());
    }
    #[inline]
    pub fn get_matrix(&self) -> &AdaptiveTransitionFunctionMatrix {
        &self.matrix
    }
}

impl util::Parseable for AdaptiveTransitionFunction {
    fn parse(input: &str) -> Self {
        Self {
            matrix: util::Parseable::parse(input),
        }
    }
}

impl util::Newable for AdaptiveTransitionFunction {
    fn new() -> Self {
        Self {
            matrix: util::Newable::new(),
        }
    }
}

impl util::Newable for AdaptiveTransitionFunctionMapNode {
    fn new() -> Self {
        Self::temp_link()
    }
}

impl AdaptiveTransitionFunctionMapNode {
    fn solidify(self) -> Self {
        match self {
            AdaptiveTransitionFunctionMapNode::TempLink(mut the_vec) => {
                let mut tmp: Vec<Option<Box<Self>>> = Vec::new();
                for dat in &mut the_vec {
                    tmp.push(if let Some(a) = dat.take() {
                        let to_solidify: Self = {
                            if let Ok(d) = Rc::try_unwrap(a) {
                                d.into_inner()
                            } else {
                                panic!("Cannot unwrap Rc");
                            }
                        };
                        Some(Box::new(Self::solidify(to_solidify)))
                    } else {
                        None
                    });
                }
                AdaptiveTransitionFunctionMapNode::Link(tmp)
            }
            AdaptiveTransitionFunctionMapNode::End(val) => {
                AdaptiveTransitionFunctionMapNode::End(val)
            }
            AdaptiveTransitionFunctionMapNode::Link(val) => {
                AdaptiveTransitionFunctionMapNode::Link(val)
            }
        }
    }
    #[inline]
    /// Function follow_path follows the path from a Start node all the way to the end
    pub fn follow_path(&self, input: Vec<&util::UsizeWrapper>) -> util::UsizeWrapper {
        let mut old = self;
        for data in input {
            old = old.next_node(data);
        }
        if let AdaptiveTransitionFunctionMapNode::End(dat) = old {
            dat.clone()
        } else {
            panic!("Incorrect number of dimensions");
        }
    }
    /// Function next_node returns the node pointed to by self and value
    #[inline]
    pub fn next_node(&self, value: &util::UsizeWrapper) -> &Self {
        if let AdaptiveTransitionFunctionMapNode::Link(a) = self {
            if let Some(d) = &a[value.get_data()].as_ref() {
                d
            } else {
                panic!("No value associated with given key");
            }
        } else {
            panic!("The type of node is incorrect");
        }
    }
    pub fn get_end_data(&self) -> Result<util::UsizeWrapper, usize> {
        if let AdaptiveTransitionFunctionMapNode::End(to_ret) = self {
            Ok(to_ret.clone())
        } else {
            Err(0)
        }
    }
    pub fn temp_link() -> Self {
        AdaptiveTransitionFunctionMapNode::TempLink(Vec::new())
    }
    pub fn end(value: &util::UsizeWrapper) -> Self {
        AdaptiveTransitionFunctionMapNode::End(value.clone())
    }
    pub fn link_links_to(&mut self, pointers: Vec<Option<Rc<RefCell<Self>>>>) {
        *self = AdaptiveTransitionFunctionMapNode::TempLink(pointers);
    }
    pub fn link_link_to(
        &mut self,
        value: &Option<util::UsizeWrapper>,
        pointer: Option<Rc<RefCell<Self>>>,
    ) -> Weak<RefCell<Self>> {
        let mut to_return = Weak::new();
        if let AdaptiveTransitionFunctionMapNode::TempLink(input_vector) = self {
            let usize_value = {
                if let Some(temp) = value.clone() {
                    temp.get_data()
                } else {
                    panic!("Attempted to make a link with a \"none\" value as the key");
                }
            };
            let mut is_end: bool = false;
            let remade_pointer = if let Some(a) = pointer {
                if let Ok(b) = Rc::try_unwrap(a) {
                    let inner = b.into_inner();
                    if let AdaptiveTransitionFunctionMapNode::End(c) = inner {
                        is_end = true;
                        Some(Rc::new(RefCell::new(
                            AdaptiveTransitionFunctionMapNode::End(c),
                        )))
                    } else if let AdaptiveTransitionFunctionMapNode::TempLink(c) = inner {
                        is_end = false;
                        Some(Rc::new(RefCell::new(
                            AdaptiveTransitionFunctionMapNode::TempLink(c),
                        )))
                    } else {
                        panic!("This shouldn't happen");
                    }
                } else {
                    panic!("Cannot unwrap Rc");
                }
            } else {
                None
            };
            if is_end {
                *self = {
                    if let Some(a) = remade_pointer {
                        if let Ok(b) = Rc::try_unwrap(a) {
                            b.into_inner()
                        } else {
                            panic!("This shouldn't happen");
                        }
                    } else {
                        panic!("This shouldn't happen");
                    }
                };
            } else {
                // If the current key is "too big", make room for it
                if input_vector.len() < usize_value {
                    let diff = usize_value - input_vector.len() + 1;
                    for _ in 0..diff {
                        input_vector.push(None);
                    }
                }
                if input_vector[usize_value] == None {
                    input_vector[usize_value] = remade_pointer;
                }
                if let Some(unwrapped) = &input_vector[usize_value] {
                    to_return = Rc::downgrade(&unwrapped);
                }
                *self = AdaptiveTransitionFunctionMapNode::TempLink(input_vector.to_vec());
            }
        } else {
            panic!("Improper use of link_link_to function");
        }
        to_return
    }
    pub fn add_link(
        &mut self,
        value: &Option<util::UsizeWrapper>,
        pointer: Option<Rc<RefCell<Self>>>,
    ) -> Weak<RefCell<Self>> {
        let mut to_return;
        if let AdaptiveTransitionFunctionMapNode::TempLink(_) = self {
            to_return = self.link_link_to(&value, pointer);
        } else {
            panic!("A link can only be added to a link node");
        }
        to_return
    }
}

impl AdaptiveNeighborParser {
    #[inline]
    pub fn neighbor_func_parser<'b>(
        grid: &'b cellular_process::GridDataType<util::UsizeWrapper>,
        meta: &'b AdaptiveMetaData,
        address: usize,
    ) -> cellular_process::NeighborType<'b, util::UsizeWrapper> {
        let tmp = meta.get_neighbor_parser();
        tmp.apply_neighbors(grid, meta, address)
        //unimplemented!();
    }
    #[inline]
    pub fn apply_neighbors<'b>(
        &'b self,
        grid: &'b cellular_process::GridDataType<util::UsizeWrapper>,
        meta: &'b AdaptiveMetaData,
        address: usize,
    ) -> cellular_process::NeighborType<'b, util::UsizeWrapper> {
        let dimensions = cellular_process::GridMeta::get_dimensions(meta);
        let table = &self.addr_matrix;
        let mut to_ret: Vec<&'b util::UsizeWrapper> = Vec::new();
        for item in table {
            if let AdaptiveNeighborParserNode::Absolute(the_vec) = item {
                to_ret.push(util::access_flattened_vec(
                    grid.get_data_ref(),
                    &(the_vec.iter().map(|&x| x as isize).collect::<Vec<isize>>()),
                    &dimensions.to_vec(),
                    0,
                    &self.edge_val,
                ))
            } else if let AdaptiveNeighborParserNode::Relative(the_vec) = item {
                to_ret.push(util::access_flattened_vec(
                    grid.get_data_ref(),
                    &the_vec,
                    &dimensions.to_vec(),
                    address,
                    &self.edge_val,
                ))
            } else {
                panic!("This shouldn't happen");
            }
        }
        cellular_process::NeighborType::new(to_ret, dimensions)
    }
}

impl util::Newable for AdaptiveNeighborParser {
    fn new() -> Self {
        Self {
            addr_matrix: Vec::new(),
            edge_val: util::UsizeWrapper::from(0),
        }
    }
}

impl util::Parseable for AdaptiveNeighborParser {
    fn parse(input: &str) -> Self {
        let mut split = input.split(',');
        let mut temp_vec: Vec<AdaptiveNeighborParserNode> = Vec::new();
        let edge_case: util::UsizeWrapper = {
            let cached = split.next().unwrap();
            if cached.starts_with('e') {
                util::Parseable::parse(&cached[1..cached.len()])
            } else {
                panic!("Symbol table is invalid");
            }
        };
        for item in split {
            temp_vec.push(util::Parseable::parse(item));
        }
        Self {
            addr_matrix: temp_vec,
            edge_val: edge_case,
        }
    }
}

impl util::Parseable for AdaptiveNeighborParserNode {
    fn parse(input: &str) -> Self {
        let collected: Vec<char> = input.chars().collect::<Vec<char>>();
        if collected.len() <= 1 {
            panic!("Node is invalid");
        }
        let discrim: char = {
            if let Some(d) = collected[0].to_lowercase().nth(0) {
                d
            } else {
                panic!("Character has no lowercase version");
            }
        };
        let the_string = input[1..input.len()].to_string();
        let tokenized = {
            let tmp = the_string.split(' ');
            let mut to_return: Vec<isize> = Vec::new();
            for item in tmp {
                to_return.push(if let Ok(a) = item.parse::<isize>() {
                    a
                } else {
                    panic!("Position index is not an integer");
                });
            }
            to_return
        };
        if discrim == 'a' {
            // Absolute address
            AdaptiveNeighborParserNode::Absolute(
                tokenized
                    .iter()
                    .map(|x| *x as usize)
                    .collect::<Vec<usize>>(),
            )
        } else if discrim == 'r' {
            // Relative address
            AdaptiveNeighborParserNode::Relative(
                tokenized
                    .iter()
                    .map(|&x| x as isize)
                    .collect::<Vec<isize>>(),
            )
        } else {
            panic!("Discriminator is invalid");
        }
    }
}

impl util::Newable for DummyMetaData {
    fn new() -> Self {
        Self {}
    }
}
impl util::Parseable for DummyMetaData {
    fn parse(_data: &str) -> Self {
        util::Newable::new()
    }
}
impl util::Encodeable for DummyMetaData {
    fn encode(&self) -> String {
        String::new()
    }
}

impl AdaptiveMetaData {
    #[inline(always)]
    pub fn get_neighbor_parser(&self) -> &AdaptiveNeighborParser {
        &self.neighbor_parser
    }
    #[inline(always)]
    pub fn get_transition_function(&self) -> &AdaptiveTransitionFunction {
        &self.transition
    }
}

impl cellular_process::GridMeta for AdaptiveMetaData {
    fn get_dimensions(&self) -> &[usize] {
        self.dimensions.as_slice()
    }
}

impl util::Parseable for AdaptiveMetaData {
    fn parse(input: &str) -> Self {
        let split = util::parse_table_sections(input);
        if split.len() != 3 {
            panic!("Malformed metadata table");
        }
        Self {
            dimensions: util::parse_csv_list_native(&split[0], ','),
            neighbor_parser: util::Parseable::parse(&split[1]),
            transition: util::Parseable::parse(&split[2]),
        }
    }
}

impl util::Newable for AdaptiveMetaData {
    fn new() -> Self {
        Self {
            dimensions: Vec::new(),
            neighbor_parser: util::Newable::new(),
            transition: util::Newable::new(),
        }
    }
}

impl<'a> util::Parseable for AdaptiveCellularAutomata<'a> {
    fn parse(input: &str) -> Self {
        let split = util::parse_table_sections(input);
        if split.len() != 2 {
            panic!("Malformed metadata table")
        }
        let parsed = util::parse_csv_list(&split[1], ',');
        AdaptiveCellularAutomata {
            phantom: PhantomData,
            meta: util::Parseable::parse(&split[0]),
            initial: parsed,
        }
    }
}

impl<'a> AdaptiveCellularAutomata<'a> {
    pub fn test_1() {
        let neighbor_str = "e2,a1 1";
        let parser_str = "1 2";
        let data_str = "1,1,1";
        let dim_str = "3,1";
        let meta_str = util::encode_table_sections(&[
            String::from(dim_str),
            String::from(neighbor_str),
            String::from(parser_str),
        ]);
        let final_str = util::encode_table_sections(&[meta_str, String::from(data_str)]);
        dbg!(&final_str);
        let transition: &cellular_process::TransitionFunc<util::UsizeWrapper, AdaptiveMetaData> =
            &AdaptiveTransitionFunction::apply;
        let neighbor: &cellular_process::NeighborFuncParser<util::UsizeWrapper, AdaptiveMetaData> =
            &AdaptiveNeighborParser::neighbor_func_parser;
        let mut grid = cellular_process::Grid::<util::UsizeWrapper, AdaptiveMetaData>::decode(
            final_str.as_str(),
        );
        let meta = grid.get_meta().clone();
        grid.apply(transition, neighbor, &meta);
        dbg!(grid.get_data_read()); // it's `get_data_read`, not `get_data_mut` because the direction field is
                                    //flipped after apply, so the "old" data is actually the most recent.
    }
    fn get_meta_data(&self) -> &AdaptiveMetaData {
        &self.meta
    }
    fn get_initial_state(&self) -> &Vec<util::UsizeWrapper> {
        &self.initial
    }
}

impl<'a> CellularAutomata<'a, util::UsizeWrapper, AdaptiveMetaData>
    for AdaptiveCellularAutomata<'a>
{
    fn input_handler(
        _: &mut cellular_process::Grid<util::UsizeWrapper, AdaptiveMetaData>,
        _: &Reader,
        _: &Printer,
    ) {
    }
    fn output_handler(
        _: &cellular_process::Grid<util::UsizeWrapper, AdaptiveMetaData>,
        _: &Printer,
    ) {
    }
    fn run(&self, input: &str) {
        let transition: &cellular_process::TransitionFunc<util::UsizeWrapper, AdaptiveMetaData> =
            &AdaptiveTransitionFunction::apply;
        let neighbor: &cellular_process::NeighborFuncParser<util::UsizeWrapper, AdaptiveMetaData> =
            &AdaptiveNeighborParser::neighbor_func_parser;
        let mut grid =
            cellular_process::Grid::<util::UsizeWrapper, AdaptiveMetaData>::decode(input);
        let meta = grid.get_meta().clone();
        grid.apply(transition, neighbor, &meta);
        dbg!(grid);
        //TODO: finish
    }
}

impl util::Newable for AdaptiveTransitionFunctionMatrix {
    fn new() -> Self {
        Self {
            matrix: Vec::new(),
            dimensions: Vec::new(),
        }
    }
}

impl util::Parseable for AdaptiveTransitionFunctionMatrix {
    #[inline]
    fn parse(input: &str) -> Self {
        let mut to_return_vec: Vec<Option<util::UsizeWrapper>> = Vec::new();

        let input_as_string = input.to_string();
        let split_input: Vec<&str> = input_as_string.split(',').collect();
        let tokens: Vec<Vec<usize>> = {
            let mut to_return: Vec<Vec<usize>> = Vec::new();
            let dimension_count = split_input[0].split(' ').count() - 1;
            to_return.resize(dimension_count + 1, Vec::new());
            for (indx1, j) in split_input.iter().enumerate() {
                let tmp: Vec<&str> = j.split(' ').collect();
                for item in tmp {
                    to_return[indx1].push({
                        if let Ok(a) = item.parse::<usize>() {
                            a
                        } else {
                            panic!("Not an integer");
                        }
                    });
                }
            }
            to_return
        };
        if split_input.is_empty() {
            panic!("ERROR - error reading transition function symbol table - table is empty");
        }
        let num_dimensions = split_input[0].split(' ').count() - 1; //num_dimensions is the number of dimensions, -1 because the last token is not a dimension, but the final value

        // Perform dimension sanity checks (make sure that all inputs have the same number of dimensions)
        for j in split_input {
            let tokens: Vec<&str> = j.split(' ').collect();
            if (tokens.len() - 1) != num_dimensions {
                // Malformed input (extra dimensions inserted, dimensions missing, etc)
                panic!("ERROR - missing or extra dimension");
            }
        }
        let dimension_maxima: Vec<usize> = {
            let mut to_return: Vec<Option<usize>> = Vec::new();
            for _ in 0..num_dimensions {
                to_return.push(None);
            }
            for item in &tokens {
                for (dim, value) in item.iter().enumerate() {
                    if dim == num_dimensions {
                        // the last token in value isn't actually a dimension value, it's the final value

                    } else if let Some(a) = to_return[dim] {
                        if value > &a {
                            to_return[dim] = Some(*value);
                        }
                    } else {
                        to_return[dim] = Some(*value);
                    }
                }
            }
            let mut final_to_return: Vec<usize> = Vec::new();
            for item in to_return {
                if let Some(a) = item {
                    final_to_return.push(a);
                } else {
                    panic!("Symbol table is invalid");
                }
            }
            final_to_return
        };
        for _ in 0..util::addr_normal_to_flattened_usize(
            &dimension_maxima,
            &(dimension_maxima
                .iter()
                .map(|x| x + 1)
                .collect::<Vec<usize>>()),
        ) {
            to_return_vec.push(None);
        }
        for item in tokens {
            to_return_vec[util::addr_normal_to_flattened_usize(
                &item[0..item.len() - 1],
                &dimension_maxima,
            )] = Some(util::UsizeWrapper::from(item[item.len() - 1]));
        }
        Self {
            matrix: to_return_vec,
            dimensions: dimension_maxima,
        }
    }
}

impl AdaptiveTransitionFunctionMatrix {
    #[inline]
    pub fn follow_path(&self, path: &[&util::UsizeWrapper]) -> util::UsizeWrapper {
        if let Some(a) = &self.matrix[util::addr_normal_to_flattened_usize(
            &(path.iter().map(|x| x.get_data()).collect::<Vec<usize>>()),
            &self.dimensions,
        )] {
            a.clone()
        } else {
            panic!("No value associated with given key");
        }
    }
}