Function expression

MathBox/mathbox-core.js:32663–32674

(rbp)

}

function expression(rbp) {
  var left, t = token
  advance()

  left = t.nud()
  while(rbp < token.lbp) {
    t = token
    advance()
    left = t.led(left)
  }
  return left
}

function infix(id, bp, led) {
  var sym = symbol(id, bp)