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use kernel::*;
use variable::concept::*;
use variable::ops::*;
use gcollections::kind::*;
use gcollections::ops::*;
use gcollections::ops::sequence::ordering::*;
use std::slice;
use std::ops::{Deref, DerefMut, Index};
use std::fmt::{Formatter, Display, Error};
use std::rc::*;
use std::mem;
use std::fmt::Debug;
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct CopyMemory<Domain>
{
variables: Vec<Domain>
}
impl<Domain> MemoryConcept for CopyMemory<Domain> where
Domain: Clone + Display + Debug
{}
impl<Domain> ImmutableMemoryConcept for CopyMemory<Domain> where
Domain: Clone + Display + Debug
{}
impl<Domain> Collection for CopyMemory<Domain>
{
type Item = Domain;
}
impl<Domain> AssociativeCollection for CopyMemory<Domain>
{
type Location = usize;
}
impl<Domain> Replace for CopyMemory<Domain>
{
fn replace(&mut self, key: usize, dom: Domain) -> Domain {
mem::replace(&mut self.variables[key], dom)
}
}
impl<Domain> Index<usize> for CopyMemory<Domain>
{
type Output = Domain;
fn index<'a>(&'a self, index: usize) -> &'a Domain {
&self.variables[index]
}
}
impl<Domain> CopyMemory<Domain>
{
fn restore(variables: Vec<Domain>) -> CopyMemory<Domain> {
CopyMemory {
variables: variables
}
}
}
impl<Domain> Deref for CopyMemory<Domain>
{
type Target = Vec<Domain>;
fn deref(&self) -> &Self::Target {
&self.variables
}
}
impl<Domain> DerefMut for CopyMemory<Domain>
{
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.variables
}
}
impl<Domain> Empty for CopyMemory<Domain>
{
fn empty() -> CopyMemory<Domain> {
CopyMemory {
variables: vec![]
}
}
}
impl<Domain> Cardinality for CopyMemory<Domain>
{
type Size = usize;
fn size(&self) -> usize {
self.variables.len()
}
}
impl<Domain> Iterable for CopyMemory<Domain>
{
fn iter<'a>(&'a self) -> slice::Iter<'a, Self::Item> {
self.variables.iter()
}
}
impl<Domain> Push<Back> for CopyMemory<Domain>
{
fn push(&mut self, value: Domain) {
self.variables.push(value);
}
}
impl<Domain> Display for CopyMemory<Domain> where
Domain: Display
{
fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error> {
for v in &self.variables {
formatter.write_fmt(format_args!("{} ", v))?;
}
Ok(())
}
}
impl<Domain> Freeze for CopyMemory<Domain> where
Domain: Clone
{
type FrozenState = FrozenCopyMemory<Domain>;
fn freeze(self) -> Self::FrozenState
{
FrozenCopyMemory::new(self)
}
}
pub struct FrozenCopyMemory<Domain>
{
variables: Rc<Vec<Domain>>
}
impl<Domain> FrozenCopyMemory<Domain>
{
fn new(store: CopyMemory<Domain>) -> FrozenCopyMemory<Domain> {
FrozenCopyMemory {
variables: Rc::new(store.variables)
}
}
}
impl<Domain> Snapshot for FrozenCopyMemory<Domain> where
Domain: Clone
{
type Label = Rc<Vec<Domain>>;
type State = CopyMemory<Domain>;
fn label(&mut self) -> Self::Label {
self.variables.clone()
}
fn restore(self, label: Self::Label) -> Self::State {
let variables = Rc::try_unwrap(label).unwrap_or_else(|l| l.deref().clone());
CopyMemory::restore(variables)
}
}