tomoaki
cc8b27a1aa
Remove automatic WeakNew conversion and enforce strict compile-time type checking for weak field assignments. Only 3 assignment types allowed: 1. Result of weak(x) call (WeakRef type) 2. Existing WeakRef variable (e.g., me.parent = other.parent) 3. Void/null (clear operation) **Implementation**: - Added MirType::WeakRef to type system (src/mir/types.rs) - Track WeakRef type in emit_weak_new() even in pure mode - Weak field reads return WeakRef without auto-upgrade - Removed automatic WeakNew conversion from field writes - Implemented check_weak_field_assignment() with actionable errors - Fixed null literal type tracking (Phase 285A1.1: Unknown → Void) **Testing**: - 5 test fixtures (3 OK, 2 NG cases) - all passing - Smoke test: phase285_weak_field_vm.sh - Error messages guide users to use weak() or null **Documentation**: - Updated lifecycle.md SSOT with weak field contract 🤖 Generated with 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.
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).