Function parseCaseItem

source code/utils/bash/bashParser.ts:3352–3441

(P: ParseState)

}

function parseCaseItem(P: ParseState): TsNode | null {
  skipBlanks(P.L)
  const start = P.L.b
  const kids: TsNode[] = []
  // Optional leading '(' before pattern — bash allows (pattern) syntax
  if (peek(P.L) === '(') {
    const s = P.L.b
    advance(P.L)
    kids.push(mk(P, '(', s, P.L.b, []))
  }
  // Pattern(s)
  let isFirstAlt = true
  while (true) {
    skipBlanks(P.L)
    const c = peek(P.L)
    if (c === ')' || c === '') break
    const pats = parseCasePattern(P)
    if (pats.length === 0) break
    // tree-sitter quirk: first alternative with quotes is inlined as flat
    // siblings; subsequent alternatives are wrapped in (concatenation) with
    // `word` instead of `extglob_pattern` for bare segments.
    if (!isFirstAlt && pats.length > 1) {
      const rewritten = pats.map(p =>
        p.type === 'extglob_pattern'
          ? mk(P, 'word', p.startIndex, p.endIndex, [])
          : p,
      )
      const first = rewritten[0]!
      const last = rewritten[rewritten.length - 1]!
      kids.push(
        mk(P, 'concatenation', first.startIndex, last.endIndex, rewritten),
      )
    } else {
      kids.push(...pats)
    }
    isFirstAlt = false
    skipBlanks(P.L)
    // \<newline> line continuation between alternatives
    if (peek(P.L) === '\\' && peek(P.L, 1) === '\n') {
      advance(P.L)
      advance(P.L)
      skipBlanks(P.L)
    }
    if (peek(P.L) === '|') {
      const s = P.L.b
      advance(P.L)
      kids.push(mk(P, '|', s, P.L.b, []))
      // \<newline> after | is also a line continuation
      if (peek(P.L) === '\\' && peek(P.L, 1) === '\n') {
        advance(P.L)
        advance(P.L)
      }
    } else {
      break
    }
  }
  if (peek(P.L) === ')') {
    const s = P.L.b