# errors.ludic — error handling (issue #8): assert(cond, msg) guards an invariant
# and aborts with a located message when it is broken; panic(msg) aborts outright.
# This is the SUCCESS path — every assertion here holds, so nothing aborts and the
# program runs to the end, printing:
#   5 10 0 7 1
# The failure path (a panic exits non-zero with `file:line: panic: …` on stderr)
# is exercised separately in the test runner.
program Errors {
  function checked_div(a: int, b: int) -> int {
    assert(b != 0, "division by zero")
    return a / b
  }

  function clampi(v: int, lo: int, hi: int) -> int {
    assert(lo <= hi, "lo must not exceed hi")
    if v < lo { return lo }
    if v > hi { return hi }
    return v
  }

  entry {
    print(checked_div(10, 2))    # 5
    print(clampi(15, 0, 10))     # 10  (above hi)
    print(clampi(0 - 3, 0, 10))  # 0   (below lo)
    print(clampi(7, 0, 10))      # 7   (in range)
    print(1)                     # reached: every assertion held
  }
}