hakorune/docs/development/current/RESULTBOX_MIGRATION_TODO.md

ResultBox Migration TODO (Phase 9.78h follow-up)

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