tomoaki
275fe45ba4
feat(normalization): Phase 142 P0 - Statement-level normalization
## Summary
Changed normalization unit from "block suffix" to "statement (loop only)"
to prevent pattern explosion.
## Changes
1. **PlanBox** (`plan_box.rs`):
- Always return `loop_only()` for any `loop(true)`, regardless of what follows
- Subsequent statements (return, assignments) handled by normal MIR lowering
- ~70 lines reduced, 7 unit tests updated
2. **build_block** (`stmts.rs`):
- Removed `break` after consumed=1 from suffix_router
- Continue processing subsequent statements normally
- Phase 142 P0 comments added
3. **Tests**:
- Fixture: `phase142_loop_stmt_only_then_return_length_min.hako`
- VM smoke: exit code 3 (s="abc" → s.length() → 3)
## Results
- ✅ Unit tests: 10/10 passed
- ✅ Phase 142 VM smoke: PASS
- ✅ Phase 131 regression: PASS
- ✅ Build: Success
## Design
- **Pattern Explosion Prevention**: Normalize only the loop (consumed=1)
- **Out-of-Scope Policy**: Always Ok(None) for fallback
- **Fail-Fast**: Only for "in-scope but broken" cases
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2025-12-19 04:41:01 +09:00
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