Files
hakorune/docs/development/current/main
nyash-codex 0d2eafd780 docs: Phase 129 P1 implementation plan (join_k materialization)
Detailed analysis of current state and required changes:

Current Issues:
- lower_if_node only processes then branch (incomplete)
- No join_k function generation
- verify_branch_is_return_literal too restrictive
- No env merging logic

Required Changes:
- Create JoinKBuilder helper (Box-First)
- Generate join_k as real JoinFunction
- then/else tail-call join_k with env
- Process post-if statements in join_k body
- Add verify_normalized_structure checks

Implementation Options:
- Option A: In-place modification (risky, fast)
- Option B: Phased approach (recommended, safe)

Recommended: Option B (3-phase rollout)
- Phase 129-A: JoinKBuilder foundation
- Phase 129-B: Branch lowering to join_k
- Phase 129-C: Post-if statement support

Open Questions:
1. Function ID allocation strategy
2. Post-if statement detection mechanism
3. env parameter passing representation
4. join_k naming convention

Next: User/ChatGPT decision on approach
2025-12-18 07:19:22 +09:00
..
2025-12-18 07:08:32 +09:00