abcop 0.17.2

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
141
142
143

//! UsedOnce / NeverUsed contract vectors for the plain-C-family scope
//! collectors (C, C++, Objective-C).

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
}

// ---- UsedOnce / NeverUsed over C / C++ / Objective-C ----
// One vector per dispatcher shape: dead binding, pure inline candidate,
// compound/`++` rejection, member-slot distinctness, loop-head protocol.

#[test]
fn c_flags_dead_binding_and_pure_inline_candidate() {
    let src = "int main(void) {\n  int dead = 1;\n  int cand = 2 + 3;\n  return cand + 0;\n}";
    assert_eq!(dead(Lang::C, src), vec!["dead".to_string()]);
    assert_eq!(used(Lang::C, src), vec!["cand".to_string()]);
}

#[test]
fn c_pointer_wrappers_still_bind_the_name() {
    // `char *p = s;`: pointer_declarator wraps the identifier; bare alias.
    let src = "void f(char *s) {\n  char *p = s;\n  use(p);\n}";
    assert_eq!(used(Lang::C, src), vec!["p"]);
}

#[test]
fn c_immediate_call_chain_yes_intervening_and_loop_no() {
    assert_eq!(
        used(Lang::C, "int f(void) {\n  int a = helper();\n  return a;\n}"),
        vec!["a"]
    );
    assert_eq!(
        used(
            Lang::C,
            "int f(void) {\n  int a = helper();\n  side();\n  return a;\n}"
        ),
        Vec::<String>::new()
    );
    assert_eq!(
        used(
            Lang::C,
            "int f(int n) {\n  int a = helper();\n  for (int i = 0; i < n; i++) { use(a); }\n  return 0;\n}"
        ),
        Vec::<String>::new()
    );
}

#[test]
fn c_dead_call_keeps_initializer() {
    let src = b"int f(void) {\n  int gone = helper();\n  return 1;\n}";
    let f = super::never_used_offenses(
        &super::collect_scopes(src, &parse_file_lang(src, Lang::C).unwrap(), Lang::C),
        Lang::C,
    );
    assert_eq!(f.len(), 1);
    assert_eq!(f[0].name, "gone");
    assert!(f[0].keep_init);
}

#[test]
fn c_compound_ops_and_increments_are_not_inline_candidates() {
    let src = "int main(void) {\n  int t = 0;\n  t += 1;\n  t++;\n  return t;\n}";
    assert_eq!(used(Lang::C, src), Vec::<String>::new());
}

#[test]
fn c_loop_head_vars_are_protocol() {
    // `i` is written once and read once inside the for -- the loop head
    // must be excluded so no inlining suggestion fires on it.
    let src = "int main(void) {\n  int total = 0;\n  for (int i = 0; i < 3; i++) { total += i; }\n  return total;\n}";
    assert_eq!(used(Lang::C, src), Vec::<String>::new());
    assert_eq!(dead(Lang::C, src), Vec::<String>::new());
}

#[test]
fn c_globals_are_outside_local_analysis_and_object_writes_read_the_base() {
    // file-scope statics/enums live beyond single-file scope: reads of
    // them resolve to nothing. Writing `p.px` also *reads* `p` itself --
    // the object is evaluated -- so `p` stays clean despite the field write.
    let src = "struct P { int px; };\nstatic int g = 4;\nint main(void) {\n  int orphan;\n  struct P p;\n  p.px = g;\n  return g;\n}";
    assert_eq!(used(Lang::C, src), Vec::<String>::new());
    assert_eq!(dead(Lang::C, src), vec!["orphan".to_string()]);
}
#[test]
fn cpp_pure_literal_flags_while_lambda_and_field_reads_do_not() {
    // the lambda is an impure RHS (never a candidate); `local` is a true
    // inline suggestion; `width()` calls stay member slots, not locals
    let src = "class W { public:\n  int width() { return f; }\n  int f;\n };\nint main() {\n  auto lam = [](){ return 1; };\n  W wt;\n  int local = 3;\n  return lam() + wt.width() + local;\n}";
    assert_eq!(used(Lang::Cpp, src), vec!["local".to_string()]);
    assert_eq!(dead(Lang::Cpp, src), Vec::<String>::new());
}

#[test]
fn header_extension_uses_cpp_so_class_fields_stay_clean() {
    // `.h` must not pick the C grammar: that misreads `class` bodies as
    // functions and NeverUsed-flags every member.
    assert_eq!(
        crate::paths::lang_for(std::path::Path::new("MainWindowPrivate.h")),
        Lang::Cpp
    );
    let src = "class MainWindowPrivate {\npublic:\n  int life;\n  QWidget *presence;\n  Arena *arena = nullptr;\n};\n";
    assert_eq!(dead(Lang::Cpp, src), Vec::<String>::new());
}

#[test]
fn export_macro_class_is_not_a_function_of_locals() {
    // `class UTIL_EXPORT Foo { ... }` is misparsed as a function_definition;
    // members (and a phantom empty declarator on `class Impl;`) must not
    // surface as NeverUsed.
    let src = "class UTIL_EXPORT SaxParser {\nprivate:\n  class Impl;\n  std::unique_ptr<Impl> m_impl;\nprotected:\n  bool m_processed { true };\n};\n";
    assert_eq!(dead(Lang::Cpp, src), Vec::<String>::new());
    assert_eq!(used(Lang::Cpp, src), Vec::<String>::new());
}