deslop 0.2.0

A static analyzer that spots low-context and AI-assisted code patterns across naming, concurrency, security, performance, and test quality.
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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139

use std::collections::BTreeSet;

use tree_sitter::Node;

use crate::analysis::{FieldSummary, StructSummary};

use super::{leading_attributes, named_child_by_kind, parse_attribute_texts, parse_derive_names};

pub(super) fn collect_struct_summaries(
    root: Node<'_>,
    source: &str,
    default_impls: &BTreeSet<String>,
) -> Vec<StructSummary> {
    let mut structs = Vec::new();
    visit_for_struct_summaries(root, source, default_impls, &mut structs);
    structs.sort_by(|left, right| left.line.cmp(&right.line).then(left.name.cmp(&right.name)));
    structs
}

fn visit_for_struct_summaries(
    node: Node<'_>,
    source: &str,
    default_impls: &BTreeSet<String>,
    structs: &mut Vec<StructSummary>,
) {
    if node.kind() == "struct_item"
        && let Some(summary) = build_struct_summary(node, source, default_impls)
    {
        structs.push(summary);
    }

    let mut cursor = node.walk();
    for child in node.named_children(&mut cursor) {
        visit_for_struct_summaries(child, source, default_impls, structs);
    }
}

fn build_struct_summary(
    node: Node<'_>,
    source: &str,
    default_impls: &BTreeSet<String>,
) -> Option<StructSummary> {
    let name_node = node.child_by_field_name("name")?;
    let name = source.get(name_node.byte_range())?.trim().to_string();
    let fields = node
        .child_by_field_name("body")
        .or_else(|| named_child_by_kind(node, "field_declaration_list"))
        .map(|body| collect_struct_fields(body, source))
        .unwrap_or_default();
    let derives = parse_derive_names(&leading_attributes(node), source);
    let visibility_pub = source.get(node.byte_range()).is_some_and(|text| {
        text.trim_start().starts_with("pub ") || text.trim_start().starts_with("pub(")
    });

    Some(StructSummary {
        line: node.start_position().row + 1,
        name: name.clone(),
        fields,
        has_debug_derive: derives.iter().any(|derive| derive == "Debug"),
        has_default_derive: derives.iter().any(|derive| derive == "Default"),
        has_serialize_derive: derives.iter().any(|derive| derive == "Serialize"),
        has_deserialize_derive: derives.iter().any(|derive| derive == "Deserialize"),
        visibility_pub,
        derives,
        attributes: parse_attribute_texts(&leading_attributes(node), source),
        impl_default: default_impls.contains(&name),
    })
}

fn collect_struct_fields(node: Node<'_>, source: &str) -> Vec<FieldSummary> {
    let mut fields = Vec::new();
    let mut cursor = node.walk();
    for child in node.named_children(&mut cursor) {
        if child.kind() != "field_declaration" {
            continue;
        }

        let Some(name_node) = child.child_by_field_name("name") else {
            continue;
        };
        let Some(type_node) = child.child_by_field_name("type") else {
            continue;
        };
        let name = source
            .get(name_node.byte_range())
            .unwrap_or("")
            .trim()
            .to_string();
        let type_text = source
            .get(type_node.byte_range())
            .unwrap_or("")
            .trim()
            .to_string();
        let normalized_type = type_text
            .chars()
            .filter(|character| !character.is_whitespace())
            .collect::<String>();
        let primitive_name = normalized_type
            .trim_start_matches('&')
            .trim_start_matches("mut")
            .trim_start_matches('&');
        let is_primitive = matches!(
            primitive_name,
            "bool"
                | "str"
                | "String"
                | "usize"
                | "u8"
                | "u16"
                | "u32"
                | "u64"
                | "u128"
                | "isize"
                | "i8"
                | "i16"
                | "i32"
                | "i64"
                | "i128"
                | "f32"
                | "f64"
        );

        fields.push(FieldSummary {
            line: child.start_position().row + 1,
            name,
            attributes: parse_attribute_texts(&leading_attributes(child), source),
            is_pub: source.get(child.byte_range()).is_some_and(|text| {
                text.trim_start().starts_with("pub ") || text.trim_start().starts_with("pub(")
            }),
            is_option: normalized_type.starts_with("Option<")
                || normalized_type.contains("::Option<")
                || normalized_type.starts_with("std::option::Option<"),
            is_bool: primitive_name == "bool",
            is_primitive,
            type_text,
        });
    }
    fields
}