Function js_multiline_strip

codegraph-kernel/src/docstring.rs:78–102

JS-semantics `str.replace(/^ /gm, "")`: try the \A-anchored `pat` at position 0 and after every JS line terminator, left to right, resuming after each match's end — a faithful /g replace. (Remaining known divergence: JS `\s` includes U+FEFF, Rust's does not; an embedded BOM inside a comment is accepted as unreachable.)

(s: &str, pat: &Regex)

/// divergence: JS `\s` includes U+FEFF, Rust's does not; an embedded BOM
/// inside a comment is accepted as unreachable.)
fn js_multiline_strip(s: &str, pat: &Regex) -> String {
    let mut out = String::with_capacity(s.len());
    let mut last = 0usize;
    let mut pos = 0usize;
    while pos <= s.len() {
        let at_line_start = pos == 0
            || s[..pos].chars().next_back().is_some_and(is_js_line_terminator);
        if at_line_start {
            if let Some(m) = pat.find(&s[pos..]) {
                if !m.is_empty() {
                    out.push_str(&s[last..pos]);
                    last = pos + m.end();
                    pos = last;
                    continue;
                }
            }
        }
        match s[pos..].chars().next() {
            Some(c) => pos += c.len_utf8(),
            None => break,
        }
    }
    out.push_str(&s[last..]);
    out
}

/// cleanCommentMarkers — strip comment syntax, keep the prose.
pub fn clean_comment_markers(comment: &str) -> String {