// Phase 188: String append with literal
// Pattern: s = s + "y" (StringAppendLiteral)
// Pattern 4: Loop with continue

static box SAppendLit {
  method main() {
    local s = ""
    local i = 0
    loop(i < 5) {
      i = i + 1
      if i > 3 {
        continue
      }
      s = s + "y"
    }
    print(s)  // Expected: "yyy"
  }
}