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Current Task — Macro Normalize + Freeze (Save Point)

Updated: 20250920

Today (Done)

  • PeekExpr → If 連鎖の正変換を安定化
    • マクロ側IfMatchNormalizeでの検出を has_kind("PeekExpr") に統一。
    • Local/Assignment/Return/Print の4経路で PeekExpr を If に置換できるよう整備。
    • 子ランナーPyVM経路の不安定さを踏まえ、既定実行を「internalchild内蔵変換」に切替。
      • 内蔵変換Rustで Literalonly の match を If 連鎖へ正規化する安全パスを実装。
    • Golden 緑化: tools/test/golden/macro/match_literal_basic_user_macro_golden.sh
  • ランナー診断の強化
    • 子プロセス stderr を親に透過。失敗時にエラー内容を必ず表示EOF隠れを防止
  • JsonBuilder の安定化
    • キーワード衝突を回避local → local_decl。呼び出し側を追従。
  • LLVM PHI 健全性スモーク拡張If/Matchを追加
    • 実行には LLVM ビルドが必要。スクリプトは tools/test/smoke/llvm/ir_phi_hygiene_ifcases.sh。
  • Scope ヒント設計noop
    • docs/guides/scope-hints.md を追加(今は観測用のみ)。

重要な運用変更

  • ユーザーマクロは継続使用。ただし既定実行は internalchild内蔵変換
    • NYASH_MACRO_BOX_CHILD_RUNNER の既定は OFF必要時のみON
    • 子環境では NYASH_MACRO_ENABLE=0 などを明示して再帰初期化を抑止。

Delivered (Macro Platform)

  • Builtin macros (Rust): derive(Equals/ToString) minimal, publiconly + hygiene.
  • User macros (Nyash/PyVM): Proxy → child process (NYASH_VM_USE_PY=1, plugins disabled, timeout). Strict=1 by default (fail on error/timeout; strict=0 → identity fallback).
  • Dump/Trace: --dump-expanded-ast-json, NYASH_MACRO_TRACE_JSONL=….
  • Runner routes:
    • Child mode (PoC): --macro-expand-child <file> (stdin JSON → stdout JSON).
    • PyVM runner (recommended): dynamic runner includes macro and calls MacroBoxSpec.expand(json) once per pass.
  • Templates & Tests:
    • Templates: echo_macro (identity), upper_string_macro ("UPPER:" prefix → uppercase suffix).
    • Array/Map examples: array_prepend_zero_macro (prepend 0 to any Array), map_insert_tag_macro (insert {"__macro":"on"} into any Map).
    • Goldens (user macros): identity, upper_string, array_prepend_zero, array_empty, array_nested, array_mixed, map_insert_tag, map_multi, map_esc。
    • Negative smokes: user macro timeout (strict fail), invalid JSON strict fail, invalid JSON nonstrict → identity fallback。
  • Capabilities (実効化): マクロNyashのAST静的走査で IO/NET をゲートstrict=fail / 非厳格は未登録=identity
  • MacroCtx (MVP): gensym/report/getEnv の最小スキャフォールドを提供。
  • Selfhost 前展開PyVM限定: NYASH_USE_NY_COMPILER=1 + NYASH_MACRO_SELFHOST_PRE_EXPAND=1|auto → AST前展開→MIR→PyVM 実行。
  • CI: mingate に macrogolden ジョブと selfhostpreexpandsmoke を追加。
  • Docs: usermacros.md / astjsonv0.md / capabilities.md (io/net/env).

Delivered (LoopForm MVP1 Safe)

  • LoopNormalize macro (Nyash runner) scaffolded and active.
  • Canonicalize Loop node key order (condition → body).
  • Safe body reorder: move Assignment nodes to tail only when original order already has nonassign → assign; otherwise keep order (no semantic change).
  • JsonBuilder utility added for AST JSON v0 fragments (stringbased minimal helpers).
  • Golden comparison made keyorder insensitive (JSON normalized via python) for macro tests.
  • LLVM preexpand run verified on loop_simple (PyVM → MIR → LLVM).

Focus — Freeze & Polish

  1. 実アプリの作成と運用(マクロ前展開/PyVM/LLVMラインの動作確認
  2. バグ修正・ドキュメント整備・スモーク/ゴールデン/CI強化仕様不変
  3. 自己ホスト前展開の観測強化(ログ/スモーク)と安定運用
  4. ランタイムcapabilitiesio/net/envのPyVM側実効化は必要になった時点で最小修正

Next Milestones

  • DONE: Selfhost 前展開 既定化auto
    • 変更多: NYASH_MACRO_SELFHOST_PRE_EXPAND 未設定時に、マクロ有効かつ NYASH_VM_USE_PY=1 で自動ON安全策付き
    • 追加: --macro-preexpand-auto フラグ。
  • DONE: 環境変数の整理CLI中心の導線
    • 追加: --macro-top-level-allow, --macro-profile {dev|ci-fast|strict}(非破壊の簡易マッピング)。
  • DONE: Toplevel allow 既定値を OFF に変更 + AST検出へ統一ファイル名ヒューリスティック撤廃
  • DONE: MacroCtx 契約 PoC — ランナーが expand(json, ctx) を優先、失敗時に expand(json) へフォールバック。

Next (short)

  • Matchガード含むの正規化を内蔵変換にも拡張If 連鎖)+ golden/smoke 追加
  • LoopForm MVP2: while → carrier normalization (no break/continue, up to 2 vars)
    • Extract updated vars (e.g., i, sum) and normalize body so updates are tail; emit carrierlike structure with existing AST forms (Local/If/Loop/Assignment) while preserving semantics.
    • Add goldens (twovars) + selfhostpreexpand smokes; verify PyVM/LLVM parity.
  • LoopForm MVP3: break/continue minimal handling (singlelevel)
  • for/foreach predesugaring → LoopForm normalization (limited)
  • LLVM IR hygiene for LoopForm / If / Match — PHI at block head, no empty PHIs (smoke)
  • Docs: enrich docs/guides/loopform.md with carrier examples and JSON builder snippets.
  • If/Match normalization pass: canonical If join with single PHI group and Match→Ifchain (scrutinee once, guard fused), expression results via join var.
  • ScopeBox (compile-time meta): design + docs; no-op macro scaffold; MIR hint names (no-op) and plan for zero-cost stripping.
  • ControlFlowBuilder/PatternBuilder docs and scaffolding: author APIs for If/Match normalization and pattern conditions; migrate macros to use them.

Action Items (next 48h)

  • Enable sugar by default (array/map literals)
  • Golden normalizer (keyorder insensitive) for macro tests
  • Loop simple/twovars goldens with normalization
  • Match guard: smokePeekExpr なし)
  • Match guard: goldenliteral OR 最小形)
  • Match guard: 追加goldentype最小形、Boxなし構成
  • Smoke for guard/type match normalizationno PeekExpr; If present
  • LoopForm MVP2: twovars carrier safe normalization + tests/smokes
  • LLVM PHI hygiene smoke on LoopForm cases
  • LLVM PHI hygiene smoke on If cases
  • ScopeBox docs + macro scaffold (no-op) + MIR hint type sketch
  • ControlFlowBuilder/PatternBuilder docs本commitで追加→ スキャフォールド実装 → If/Matchマクロ置換の最初の1本
  • Reorganize macro tests under apps/tests/macro/* and update golden/smoke paths
  • Add MIR hints module (no-op sink) and loop header/latch hint calls

Phase16 Outlook

  • MacroCtx (gensym/report/getEnv) and capabilities mapped to nyash.toml.
  • Attributestyle (@derive/@lint) macros consolidated via MacroBox.
  • span/source map for better diagnostics.

Final Goal (Replacement Strategy)

  • Ultimately replace both the Rust front (beyond minimal bootstrap/backends) and PyVM with Nyash implementations—fully selfhosted pipeline.
  • Steps: front macros → resolver helpers → MIR lowering helpers → Nyash VM → phase out PyVM → reduce Rust to boot/backends only.

Quick Reference

  • Profiles: --profile {lite|dev|ci|strict}dev相当が既定運用
  • Register macros: NYASH_MACRO_PATHS=apps/macros/examples/echo_macro.nyash
  • Strict/Timeout: NYASH_MACRO_STRICT=1(既定), NYASH_NY_COMPILER_TIMEOUT_MS=2000
  • Dump expanded AST: nyash --dump-expanded-ast-json <file.nyash>
  • Selfhost 前展開: 既定autoPyVM限定
  • Docs: docs/guides/user-macros.md, docs/guides/macro-profiles.md, docs/reference/ir/ast-json-v0.md, docs/reference/macro/capabilities.md