hakorune/apps/tests/phase217_if_sum_multi_min.hako

// Phase 217: Multi-carrier if-sum pattern test
// Tests: Loop with 2 accumulators (sum + count) updated conditionally
// Target: selfhost multi-carrier if-sum pattern (e.g., sum definitions + count items)
//
// Expected behavior:
//   Array has 3 items: [null, "a", "b"]
//   null items are skipped (i=0)
//   Valid items are counted (i=1, i=2)
//   sum += 1, count += 1 when item != null
//
// Expected result: sum=2, count=2

static box IfSumMultiTest {
    sum_and_count(defs) {
        local sum
        sum = 0
        local count
        count = 0
        local i
        i = 0
        local len
        len = 3

        loop(i < len) {
            // Simulate array: [null, "a", "b"]
            //   i=0 → null (skip both updates)
            //   i=1 → "a" (increment both)
            //   i=2 → "b" (increment both)

            if i > 0 {
                // Conditional updates: both sum and count
                sum = sum + 1
                count = count + 1
                print(sum)    // Force if to stay in MIR
                print(count)
            } else {
                print(0)      // Ensure else branch exists
            }

            i = i + 1
        }

        return sum  // Return sum (count is also computed but not returned)
    }

    main() {
        // Test: Array [null, "a", "b"] → sum=2, count=2
        local result
        result = IfSumMultiTest.sum_and_count(0)  // dummy arg
        return result
    }
}