Function parseArithBinary

source code/utils/bash/bashParser.ts:4234–4264

Precedence-climbing binary expression parser.

(
  P: ParseState,
  stop: string,
  minPrec: number,
  mode: ArithMode,
)

/** Precedence-climbing binary expression parser. */
function parseArithBinary(
  P: ParseState,
  stop: string,
  minPrec: number,
  mode: ArithMode,
): TsNode | null {
  let left = parseArithUnary(P, stop, mode)
  if (!left) return null
  while (true) {
    skipBlanks(P.L)
    if (isArithStop(P, stop)) break
    if (peek(P.L) === ',') break
    const opInfo = scanArithOp(P)
    if (!opInfo) break
    const [opText, opLen] = opInfo
    const prec = ARITH_PREC[opText]
    if (prec === undefined || prec < minPrec) break
    const os = P.L.b
    for (let k = 0; k < opLen; k++) advance(P.L)
    const op = mk(P, opText, os, P.L.b, [])
    const nextMin = ARITH_RIGHT_ASSOC.has(opText) ? prec : prec + 1
    const right = parseArithBinary(P, stop, nextMin, mode)
    if (!right) break
    left = mk(P, 'binary_expression', left.startIndex, right.endIndex, [
      left,
      op,
      right,
    ])
  }
  return left
}

function parseArithUnary(
  P: ParseState,