Function parseTestRegexRhs

src/utils/bash/bashParser.ts:3937–3977

(P: ParseState)

// RHS of =~ in [[ ]] — scan as single (regex) node with paren/bracket counting
// so | ( ) inside the regex don't break parsing. Stop at ]] or ws+&&/||.
function parseTestRegexRhs(P: ParseState): TsNode | null {
  skipBlanks(P.L)
  const start = P.L.b
  let parenDepth = 0
  let bracketDepth = 0
  while (P.L.i < P.L.len) {
    const c = peek(P.L)
    if (c === '\\' && P.L.i + 1 < P.L.len) {
      advance(P.L)
      advance(P.L)
      continue
    }
    if (c === '\n') break
    if (parenDepth === 0 && bracketDepth === 0) {
      if (c === ']' && peek(P.L, 1) === ']') break
      if (c === ' ' || c === '\t') {
        // Peek past blanks for ]] or &&/||
        let j = P.L.i
        while (j < P.L.len && (P.L.src[j] === ' ' || P.L.src[j] === '\t')) j++
        const nc = P.L.src[j] ?? ''
        const nc1 = P.L.src[j + 1] ?? ''
        if (
          (nc === ']' && nc1 === ']') ||
          (nc === '&' && nc1 === '&') ||
          (nc === '|' && nc1 === '|')
        ) {
          break
        }
        advance(P.L)
        continue
      }
    }
    if (c === '(') parenDepth++
    else if (c === ')' && parenDepth > 0) parenDepth--
    else if (c === '[') bracketDepth++
    else if (c === ']' && bracketDepth > 0) bracketDepth--
    advance(P.L)
  }
  if (P.L.b === start) return null
  return mk(P, 'regex', start, P.L.b, [])
}

// RHS of ==/!=/= in [[ ]] — returns array of parts. Bare text → extglob_pattern
// (with paren counting for @(a|b)); $(...)/${}/quoted → proper node types.