abcop 0.17.0

Must-have ABC complexity gate for AI development. Ruby, Rust, Python, Go, JS/TS, C/C++, PHP, Java, C#, Swift, Zig, Dart, Solidity, ObjC
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
140

//! UsedOnce / NeverUsed contract vectors for the Swift scope collector.

use crate::paths::{Lang, parse_file_lang};

fn used(lang: Lang, src: &'static str) -> Vec<String> {
    let mut v: Vec<_> = super::used_once_offenses(
        &super::collect_scopes(
            src.as_bytes(),
            &parse_file_lang(src.as_bytes(), lang).expect("fixture parses"),
            lang,
        ),
        lang,
    )
        .into_iter()
        .map(|o| o.name)
        .collect();
    v.sort();
    v
}

fn dead(lang: Lang, src: &'static str) -> Vec<String> {
    let mut v: Vec<_> = super::never_used_offenses(
        &super::collect_scopes(
            src.as_bytes(),
            &parse_file_lang(src.as_bytes(), lang).expect("fixture parses"),
            lang,
        ),
        lang,
    )
        .into_iter()
        .map(|o| o.name)
        .collect();
    v.sort();
    v
}

#[test]
fn swift_never_used_flags_dead_binding() {
    let src = "func f() {\n  let unused = 1\n  return 0\n}";
    assert_eq!(dead(Lang::Swift, src), vec!["unused".to_string()]);
}

#[test]
fn swift_used_once_flags_inline_candidate() {
    let src =
        "func f(a: Int) -> Int {\n  let r = a + 1\n  let d = r + 2\n  let g = 5\n  return g + d\n}";
    // `g` is assigned a pure literal and read once -> inline candidate.
    // `d`/`r` have local-reading (impure) RHS -> not candidates, matching
    // the JS backend purity rules.
    assert_eq!(used(Lang::Swift, src), vec!["g".to_string()]);
}
#[test]
fn swift_reassigned_var_is_not_inline_candidate() {
    let src = "func f() {\n  var c = 0\n  c = 1\n  c = 2\n  return c\n}";
    assert_eq!(used(Lang::Swift, src), Vec::<String>::new());
}

#[test]
fn swift_immediate_call_chain_yes_intervening_and_loop_no() {
    assert_eq!(
        used(
            Lang::Swift,
            "func f() -> Int {\n  let a = helper()\n  return a\n}"
        ),
        vec!["a"]
    );
    assert_eq!(
        used(
            Lang::Swift,
            "func f() -> Int {\n  let a = helper()\n  side()\n  return a\n}"
        ),
        Vec::<String>::new()
    );
    assert_eq!(
        used(
            Lang::Swift,
            "func f(_ items: [Int]) {\n  let a = helper()\n  for x in items { use(a) }\n}"
        ),
        Vec::<String>::new()
    );
}

#[test]
fn swift_dead_call_keeps_initializer() {
    let src = b"func f() -> Int {\n  let gone = helper()\n  return 1\n}";
    let f = super::never_used_offenses(
        &super::collect_scopes(
            src,
            &parse_file_lang(src, Lang::Swift).unwrap(),
            Lang::Swift,
        ),
        Lang::Swift,
    );
    assert_eq!(f.len(), 1);
    assert_eq!(f[0].name, "gone");
    assert!(f[0].keep_init);
}

#[test]
fn swift_member_reads_are_not_variable_reads() {
    let src = "class C {\n  func f() {\n    let x = 1\n    return self.helper + x\n  }\n  func helper() -> Int { 0 }\n}";

    let bindings: Vec<String> = super::collect_scopes(
        src.as_bytes(),
        &parse_file_lang(src.as_bytes(), Lang::Swift).unwrap(),
        Lang::Swift,
    )
        .scopes
        .iter()
        .flat_map(|s| s.entries.keys())
        .map(|k| k.as_ref().to_string())
        .collect();
    // `x` is a local binding (read via the trailing expression); `helper`
    // is a member read off `self` and must NOT appear as a local binding.
    assert!(bindings.contains(&"x".to_string()));
    assert!(!bindings.contains(&"helper".to_string()));
}

#[test]
fn swift_member_field_read_does_not_count_as_local_read() {
    // `self.x` must not register a phantom read of a same-named local `x`;
    // the local is never read, so it is NeverUsed (not a UsedOnce candidate).
    let src = "class C {\n  func f() -> Int {\n    let x = 1\n    return self.x\n  }\n  var x: Int { 0 }\n}";
    assert_eq!(dead(Lang::Swift, src), vec!["x".to_string()]);
    assert_eq!(used(Lang::Swift, src), Vec::<String>::new());
}

#[test]
fn swift_compound_assignment_is_not_used_once() {
    let src = "func f() {\n  var t = 0\n  t += 1\n  return t\n}";
    assert_eq!(used(Lang::Swift, src), Vec::<String>::new());
}

#[test]
fn swift_closure_rhs_is_not_pure() {
    // A closure is not a pure RHS, so even a single-use captured local
    // must not be inlined across the capture boundary.
    let src = "func f() {\n  let n = 1\n  let c = { (_: Int) in n }\n  return c(0) + n\n}";
    assert_eq!(used(Lang::Swift, src), Vec::<String>::new());
}