4ecb6435d3
Complete design documentation for Pattern4 (continue) Normalized support,
extending unified Normalized infrastructure to all 4 loop patterns.
Design documents:
- phase48-norm-p4-design.md: Complete P4 Normalized design (380 lines)
- Key insight: continue = immediate TailCallFn(loop_step, ...) (no new instruction!)
- Infrastructure reuse: 95%+ from P2/P3 (only ContinueCheck step kind new)
- Target loops prioritized:
- ◎ _parse_array (skip whitespace) - PRIMARY (Phase 48-A)
- ○ _parse_object (skip whitespace) - Extended
- △ _unescape_string, _parse_string - Later
- Control flow: ContinueCheck before Updates (skip processing early)
- Same EnvLayout/ConditionEnv/CarrierInfo/ExitLine as P2/P3
- Implementation strategy: dev-only → canonical (proven approach)
Architecture:
- Unified Normalized for P1/P2/P3/P4 (all patterns same pipeline)
- P4 uses loop_step(env, k_exit) skeleton (same as P2/P3)
- continue semantics: TailCallFn = skip to next iteration (CPS natural fit)
Benefits:
- 95% infrastructure reuse from P2/P3
- No new JpInst needed (continue = existing TailCallFn)
- Incremental rollout (dev → canonical)
- Clear semantic: continue = immediate recursion
Implementation roadmap:
- Phase 48-A: Minimal continue (dev-only)
- Phase 48-B: Extended patterns (multi-carrier)
- Phase 48-C: Canonical promotion
Updates:
- joinir-architecture-overview.md: Added Phase 48 section
- CURRENT_TASK.md: Phase 48 entry (Design Complete)
- phase47-norm-p3-design.md: Minor formatting
Status: Design phase complete (doc-only, no implementation yet)
Next: Phase 48-A implementation (when requested)