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squash-me: It works! we must remove the debug after having added more tests

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Kerollmops 2020-06-10 14:20:35 +02:00
parent 13977d9338
commit fecd8ca54a
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GPG Key ID: 92ADA4E935E71FA4
1 changed files with 54 additions and 18 deletions
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72
src/best_proximity.rs
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@ -39,8 +39,37 @@ impl Path {
Some(Path(vec![*position]))
}
fn successors(&self, _positions: &[Vec<u32>]) -> Vec<(Path, u32)> {
vec![]
// TODO we must skip the successors that have already been sent
fn successors(&self, positions: &[Vec<u32>]) -> Vec<(Path, u32)> {
let mut successors = Vec::new();
// If we can grow or shift the path
if self.0.len() < positions.len() {
let mut grown_path = self.0.clone();
grown_path.push(positions[self.0.len()][0]);
let path = Path(grown_path);
let proximity = path.proximity();
successors.push((path, proximity));
}
// We retrieve the tail of the current path and try to find
// the successor of this tail.
let next_path_tail = dbg!(self.0.last().unwrap() + 1);
// To do so we add 1 to the tail and check that something exists.
let path_tail_index = dbg!(positions[self.0.len() - 1].binary_search(&next_path_tail).unwrap_or_else(|p| p));
// If we found something it means that we can shift the path.
if let Some(pos) = positions[self.0.len() - 1].get(path_tail_index) {
let mut shifted_path = self.0.clone();
*shifted_path.last_mut().unwrap() = *pos;
let path = Path(shifted_path);
let proximity = path.proximity();
successors.push((path, proximity));
}
eprintln!("self: {:?}", self);
successors.iter().for_each(|s| eprintln!("successor: {:?}", s));
successors
}
fn proximity(&self) -> u32 {
@ -73,22 +102,20 @@ impl Iterator for BestProximity {
fn next(&mut self) -> Option<Self::Item> {
let mut output: Option<(u32, Vec<Vec<u32>>)> = None;
unimplemented!("we must use and update self.best_proximity");
loop {
let start = Path::new(&self.positions)?;
let result = dijkstra(
&start,
&Path::new(&self.positions)?,
|p| p.successors(&self.positions),
|p| self.is_path_successful(p) && output.as_ref().map_or(true, |paths| !paths.1.contains(&p.0)),
);
match result {
Some((mut paths, proximity)) => {
match dbg!(result) {
Some((mut paths, _)) => {
let positions = paths.pop().unwrap();
let proximity = positions.proximity();
// If the current output is
match &mut output {
match dbg!(&mut output) {
Some((best_proximity, paths)) => {
// If the shortest path we found is bigger than the one requested
// it means that we found all the paths with the same proximity and can
@ -108,6 +135,10 @@ impl Iterator for BestProximity {
}
}
if let Some((proximity, _)) = output.as_ref() {
self.best_proximity = proximity + 1;
}
output
}
}
@ -125,15 +156,20 @@ mod tests {
];
let mut iter = BestProximity::new(positions);
assert_eq!(iter.next(), Some((1+2, vec![vec![0], vec![1], vec![3]]))); // 3
assert_eq!(iter.next(), Some((1+2, vec![vec![0, 1, 3]]))); // 3
eprintln!("------------------");
assert_eq!(iter.next(), Some((2+2, vec![vec![2], vec![1], vec![3]]))); // 4
// assert_eq!(iter.next(), Some((3+2, vec![3, 1, 3]))); // 5
// assert_eq!(iter.next(), Some((1+5, vec![0, 1, 6]))); // 6
// assert_eq!(iter.next(), Some((4+2, vec![4, 1, 3]))); // 6
// assert_eq!(iter.next(), Some((2+5, vec![2, 1, 6]))); // 7
// assert_eq!(iter.next(), Some((3+5, vec![3, 1, 6]))); // 8
// assert_eq!(iter.next(), Some((4+5, vec![4, 1, 6]))); // 9
// assert_eq!(iter.next(), None);
assert_eq!(iter.next(), Some((2+2, vec![vec![2, 1, 3]]))); // 4
eprintln!("------------------");
assert_eq!(iter.next(), Some((3+2, vec![vec![3, 1, 3]]))); // 5
eprintln!("------------------");
assert_eq!(iter.next(), Some((1+5, vec![vec![0, 1, 6], vec![4, 1, 3]]))); // 6
eprintln!("------------------");
assert_eq!(iter.next(), Some((2+5, vec![vec![2, 1, 6]]))); // 7
eprintln!("------------------");
assert_eq!(iter.next(), Some((3+5, vec![vec![3, 1, 6]]))); // 8
eprintln!("------------------");
assert_eq!(iter.next(), Some((4+5, vec![vec![4, 1, 6]]))); // 9
eprintln!("------------------");
assert_eq!(iter.next(), None);
}
}