// Phase 189: Minimal test for _parse_number pattern
// Expected behavior: StringAppend-style loop with accumulator

static box ParseNumber {
  method main() {
    local num = 0
    local i = 0
    loop(i < 3) {
      local digit = i  // Simplified digit extraction
      num = num * 10 + digit
      i = i + 1
    }
    print(num)  // Expected: 012 -> 12 (0*10+0=0, 0*10+1=1, 1*10+2=12)
  }
}