rrubocop 0.8.15

10x faster RuboCop drop-in. Same output format and configs, without maintaining RuboCop gems.
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

//! Layout/SpaceBeforeSemicolon — ported from RuboCop/nitrocop (tree-sitter).

use tree_sitter::Tree;

use crate::cop::layout::report;
use crate::cop::{Cop, CopConfig};
use crate::correction::Correction;
use crate::diagnostic::Diagnostic;
use crate::parse::codemap::CodeMap;
use crate::parse::source::SourceFile;

pub struct SpaceBeforeSemicolon;

fn ws_before_semi(bytes: &[u8], i: usize) -> Option<usize> {
    let line_start = bytes[..i].iter().rposition(|&c| c == b'\n').map_or(0, |x| x + 1);
    let mut ws = i;
    while ws > line_start && matches!(bytes[ws - 1], b' ' | b'\t') { ws -= 1; }
    if ws == i || ws == line_start || bytes[ws - 1] == b'{' { None } else { Some(ws) }
}

fn check_at(
    cop: &dyn Cop, source: &SourceFile, bytes: &[u8], i: usize,
    diagnostics: &mut Vec<Diagnostic>, corrections: &mut Option<&mut Vec<Correction>>,
) {
    let Some(ws) = ws_before_semi(bytes, i) else { return; };
    report::report_fix(
        cop, source, ws, "Space found before semicolon.".into(),
        diagnostics, corrections, ws, i, String::new(),
    );
}

impl Cop for SpaceBeforeSemicolon {
    fn name(&self) -> &'static str { "Layout/SpaceBeforeSemicolon" }
    fn supports_autocorrect(&self) -> bool { true }

    fn uses_source_phase(&self) -> bool {
        true
    }

    fn check_source(
        &self, source: &SourceFile, _tree: &Tree, code_map: &CodeMap,
        _config: &CopConfig, diagnostics: &mut Vec<Diagnostic>,
        mut corrections: Option<&mut Vec<Correction>>,
    ) {
        let bytes = source.as_bytes();
        for (i, &b) in bytes.iter().enumerate() {
            if b != b';' || i == 0 || code_map.covers(i) { continue; }
            check_at(self, source, bytes, i, diagnostics, &mut corrections);
        }
    }
}