hakorune/docs/development/current/RESULTBOX_MIGRATION_TODO.md

## ResultBox Migration TODO (Phase 9.78h follow-up)

> **Status**: Legacy TODO（状態スナップショット）  
> **Note**: 実際の移行状況・今後の計画は `RESULTBOX` 関連のコードとロードマップ側を正とし、このメモは Phase 9.78h 時点のタスク列挙の記録としてのみ保持しています。

Goal: fully migrate from legacy `box_trait::ResultBox` to `boxes::result::NyashResultBox` (aka `boxes::ResultBox`).

### Current usages (grep snapshot)
- src/backend/vm.rs
  - Handles both new `NyashResultBox` and legacy `box_trait::ResultBox` for `.is_ok/.get_value/.get_error` (deprecation suppressed)。

### Proposed steps (small, incremental)
- Step 1: Keep dual handling but gate legacy path with feature flag or cfg for deprecation-only builds（任意）。
- Step 2: Audit call sites that construct legacy ResultBox; replace with `boxes::result::NyashResultBox` constructors。
- Step 3: Remove legacy path from VM once no legacy constructors remain。
- Step 4: Delete/Archive legacy `box_trait::ResultBox`（テスト緑後）。

### Notes
- New API already aliased: `pub type ResultBox = NyashResultBox;` so external references may transparently resolve after migration。
- Keep migration scoped: do not mix with unrelated refactors。

Last updated: 2025-08-25
-												Refactor (light): move VM value ops to backend/vm_values.rs; add backend/vm_boxcall.rs with call_box_method_impl and rewire call_unified_method. Update CURRENT_TASK for refactor start.

											
										
										
											2025-08-26 00:48:09 +09:00
+								## ResultBox Migration TODO (Phase 9.78h follow-up)
-												feat(hako_check): Phase 153 - Dead code detection revival (JoinIR version)

Implement comprehensive dead code detection for hako_check with JoinIR
integration, following Phase 133/134/152 box-based modularity pattern.

## Key Achievements

1. **Comprehensive Inventory** (`phase153_hako_check_inventory.md`):
   - Documented current hako_check architecture (872 lines)
   - Analyzed existing HC011/HC012 rules
   - Confirmed JoinIR-only pipeline (Phase 124)
   - Identified Phase 153 opportunities

2. **DeadCodeAnalyzerBox** (`rule_dead_code.hako`):
   - Unified HC019 rule (570+ lines)
   - Method-level + box-level dead code detection
   - DFS reachability from entrypoints
   - Text-based analysis (no MIR JSON dependency for MVP)
   - Heuristic-based false positive reduction

3. **CLI Integration** (`cli.hako`):
   - Added `--dead-code` flag for comprehensive mode
   - Added `--rules dead_code` for selective execution
   - Compatible with --format (text/json-lsp/dot)

4. **Test Infrastructure**:
   - HC019_dead_code test directory (ng/ok/expected.json)
   - `hako_check_deadcode_smoke.sh` with 4 test cases

## Technical Details

- **Input**: Analysis IR (MapBox with methods/calls/boxes/entrypoints)
- **Output**: HC019 diagnostics
- **Algorithm**: Graph-based DFS reachability
- **Pattern**: Box-based modular architecture
- **No ENV vars**: CLI flags only

## Files Modified

- NEW: docs/development/current/main/phase153_hako_check_inventory.md
- NEW: tools/hako_check/rules/rule_dead_code.hako
- MOD: tools/hako_check/cli.hako
- NEW: tools/hako_check/tests/HC019_dead_code/
- NEW: tools/hako_check_deadcode_smoke.sh
- MOD: CURRENT_TASK.md

## Next Steps

- Phase 154+: MIR CFG integration for block-level detection
- Phase 160+: Integration with .hako JoinIR/MIR migration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

											
										
										
											2025-12-04 14:19:48 +09:00
+								> **Status**: Legacy TODO（状態スナップショット）
 								> **Note**: 実際の移行状況・今後の計画は `RESULTBOX` 関連のコードとロードマップ側を正とし、このメモは Phase 9.78h 時点のタスク列挙の記録としてのみ保持しています。
-												Refactor (light): move VM value ops to backend/vm_values.rs; add backend/vm_boxcall.rs with call_box_method_impl and rewire call_unified_method. Update CURRENT_TASK for refactor start.

											
										
										
											2025-08-26 00:48:09 +09:00
+								Goal: fully migrate from legacy `box_trait::ResultBox` to `boxes::result::NyashResultBox` (aka `boxes::ResultBox`).
 								### Current usages (grep snapshot)
 								- src/backend/vm.rs
 								  - Handles both new `NyashResultBox` and legacy `box_trait::ResultBox` for `.is_ok/.get_value/.get_error` (deprecation suppressed)。
 								### Proposed steps (small, incremental)
 								- Step 1: Keep dual handling but gate legacy path with feature flag or cfg for deprecation-only builds（任意）。
 								- Step 2: Audit call sites that construct legacy ResultBox; replace with `boxes::result::NyashResultBox` constructors。
 								- Step 3: Remove legacy path from VM once no legacy constructors remain。
 								- Step 4: Delete/Archive legacy `box_trait::ResultBox`（テスト緑後）。
 								### Notes
 								- New API already aliased: `pub type ResultBox = NyashResultBox;` so external references may transparently resolve after migration。
 								- Keep migration scoped: do not mix with unrelated refactors。
 								Last updated: 2025-08-25