pumpkin-core 0.5.0

The core of the Pumpkin constraint programming solver.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

use std::marker::PhantomData;

use super::StorageKey;

/// Generates a sequence of [`StorageKey`]s.
#[derive(Clone, Copy, Debug)]
pub struct KeyGenerator<Key> {
    key: PhantomData<Key>,
    counter: usize,
}

impl<Key> Default for KeyGenerator<Key> {
    fn default() -> Self {
        Self {
            key: Default::default(),
            counter: Default::default(),
        }
    }
}

impl<Key: StorageKey> KeyGenerator<Key> {
    /// Generate a new `Key`.
    pub fn next_key(&mut self) -> Key {
        let key = Key::create_from_index(self.counter);
        self.counter += 1;
        key
    }
}