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更新内容: - docs/reference/language/repl.md - Phase 288.1 完了ステータスに更新 - Implementation Architecture セクション追加（AST rewrite 方式説明） - AST Rewriter の動作フロー追加（Variable/Assignment 変換ロジック） - ExternCall Bridge の仕組み追加（__repl.get/set → VMValue） - Expression Detection ロジック追加（wrapper AST 判定） - 動作例を完全に更新（全機能が動作済み） - docs/development/current/main/phases/phase-288/README.md - Phase 288.1 完了セクション追加 - 変更ファイル一覧（8ファイル, +592行）記録 - 確認コマンド 4種 記録（変数永続化/式表示/_変数/リセット） - 回帰テスト結果記録（154/154 PASS） - docs/development/current/main/10-Now.md - "Phase 288.1 完了" に更新 - 次の候補（REPL UX 改善 / JoinIR 設計作業）を追記 - CURRENT_TASK.md - 1段落サマリー更新（288.1 完了、次の方向性） Phase 288.1 成果（SSOT記録）: ✅ 変数永続化（session → eval bridge） ✅ 式自動表示（pure expression auto-output） ✅ _ 変数（last displayed value） ✅ Fail-Fast 未定義エラー + ヒント ✅ セッションリセット（.reset） ✅ 154/154 smoke tests PASS（file mode 不変） 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Nyash Language Reference – Index
This is the entry point for Nyash language documentation.
- Full Language Reference (2025): reference/language/LANGUAGE_REFERENCE_2025.md
- Syntax Cheat Sheet: quick-reference/syntax-cheatsheet.md
- Phase 12.7 Grammar Specs (ternary, sugar; peek → match に統合):
- Overview: development/roadmap/phases/phase-12.7/grammar-specs/README.md
- Token/Grammar: development/roadmap/phases/phase-12.7/ancp-specs/ANCP-Token-Specification-v1.md
- Sugar Transformations (?., ??, |> and friends): parser/sugar.rs (source) and tools/nyfmt/NYFMT_POC_ROADMAP.md
- Match Expression (pattern matching): see the Language Reference and EBNF (peek was replaced by match)
Statement separation and semicolons
- See: reference/language/statements.md — newline as primary separator; semicolons optional for multiple statements on one line; minimal ASI rules.
Imports and namespaces
- See: reference/language/using.md —
usingsyntax, runner resolution, and style guidance.
Variables and scope
- See: reference/language/variables-and-scope.md — Block-scoped locals, assignment resolution, and strong/weak reference guidance.
- See: reference/language/lifecycle.md — Box lifetime, ownership (strong/weak), and finalization (
fini) SSOT. - See: reference/language/repl.md — REPL mode semantics (file mode vs REPL binding rules).
Type system (SSOT)
- See: reference/language/types.md — runtime truthiness,
+/compare/equality semantics, and the role/limits of MIR type facts.
Grammar (EBNF)
- See: reference/language/EBNF.md — Stage‑2 grammar specification used by parser implementations.
- Unified Members (stored/computed/once/birth_once): see reference/language/EBNF.md “Box Members (Phase 15)” and the Language Reference section. Default ON (disable with
NYASH_ENABLE_UNIFIED_MEMBERS=0).
Member exceptions and handlers (Stage‑3)
- Postfix
catch/cleanupmay be attached to computed/once/birth_once/method blocks when Stage‑3 is enabled. Stored members (plainname: Type [= expr]) do not support handlers.
Related implementation notes
- Tokenizer: src/tokenizer.rs
- Parser (expressions/statements): src/parser/expressions.rs, src/parser/statements.rs
- MIR Lowering (expressions): src/mir/builder/exprs.rs and friends
Navigation tips
- The “reference/language/LANGUAGE_REFERENCE_2025.md” is the canonical long‑form reference; use the Cheat Sheet for quick syntax lookup.
- Phase 12.7 files capture the finalized sugar and new constructs (match (replaces peek), ternary, null‑safe).