treereduce 0.4.1

Fast, syntax-aware, multi-language program reducer based on delta debugging
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82

use std::{cmp::Ordering, fmt::Display};

use serde::{Deserialize, Serialize};

use crate::id::NodeId;

/// Newtype
#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
#[serde(transparent)]
pub(super) struct TaskId {
    pub id: usize,
}

impl TaskId {
    pub(super) fn get(self) -> usize {
        self.id
    }
}

#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub(super) enum Reduction {
    Delete(NodeId),
    DeleteAll(Vec<NodeId>),
    Replace { node_id: NodeId, with: String },
    // Hoist(NodeId, NodeId),
    // Delta(NodeId),
}

// Someday, this might be able to store Nodes directly:
// https://github.com/tree-sitter/tree-sitter/issues/1241
//
// TODO(lb): Split into reduction task
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub(super) enum Task {
    // TODO(lb): Track parent kind and field name for more accurate optionality
    Explore(NodeId),
    Reduce(Reduction),
}

// TODO(lb): Show with priority, task ID
impl Task {
    pub(super) fn kind(&self) -> String {
        match self {
            Task::Explore(_) => "explore".to_string(),
            Task::Reduce(Reduction::Delete(_)) => "delete".to_string(),
            Task::Reduce(Reduction::DeleteAll(_)) => "delete_all".to_string(),
            Task::Reduce(Reduction::Replace { .. }) => "replace".to_string(),
        }
    }
}

#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub(super) struct PrioritizedTask {
    #[serde(flatten)]
    pub task: Task,
    pub id: TaskId,
    pub priority: usize,
}

impl Ord for PrioritizedTask {
    fn cmp(&self, other: &Self) -> Ordering {
        self.priority.cmp(&other.priority)
    }
}

impl PartialOrd for PrioritizedTask {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

impl Display for PrioritizedTask {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "task {} of kind {} and priority {}",
            self.id.get(),
            self.task.kind(),
            self.priority
        )
    }
}