From 3a095c0a43842aa399aaca9a0fda671bf7b8fb5a Mon Sep 17 00:00:00 2001
From: opaopa6969 <opaopa6969@gmail.com>
Date: Sat, 1 Aug 2026 22:20:50 +0900
Subject: [PATCH] =?UTF-8?q?docs:=20backend-coverage-matrix=20=E3=81=AB=20J?=
 =?UTF-8?q?AVA=5FCODE=5FLEGACY=5FASTCREATOR=20=E3=82=92=E8=BF=BD=E5=8A=A0?=
 =?UTF-8?q?=20(5=E2=86=926=20backends)=20(#60)?=
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SPEC.md 1.3 は6バックエンドを記載するが、docs/backend-coverage-matrix.md は
5バックエンド表記で JAVA_CODE_LEGACY_ASTCREATOR が欠落していた。

- 冒頭見出し "5 Execution Backends" → "6 Execution Backends"
- バックエンド一覧表に compile-legacy-astcreator 行を追加
  (実装クラス: LegacyAstCreatorJavaCodeCalculator, 凍結・リグレッション比較用)
- Feature Coverage 表に compile-legacy-astcreator 列を追加
  (JavaCodeCalculatorV3 継承・tokenReduer() override のみなので compile-hand と同一 coverage)
- docs/INDEX.md の "5 backends" 表記2箇所を "6 backends" に更新

Closes #60
---
 docs/INDEX.md                   |  4 +--
 docs/backend-coverage-matrix.md | 53 +++++++++++++++++----------------
 2 files changed, 30 insertions(+), 27 deletions(-)

diff --git a/docs/INDEX.md b/docs/INDEX.md
index 88dfc1d6..6c89515a 100644
--- a/docs/INDEX.md
+++ b/docs/INDEX.md
@@ -25,14 +25,14 @@
 
 | # | Document | Description |
 |---|----------|-------------|
-| 1 | [Implementation Guide](./implementation-guide-dialogue.en.md) | Learn the 5 backends through dialogue between Senior and Newcomer |
+| 1 | [Implementation Guide](./implementation-guide-dialogue.en.md) | Learn the 6 backends through dialogue between Senior and Newcomer |
 | 2 | [Parser Generator Comparison & @eval Strategy](./parser-generator-comparison-and-eval-strategy.en.md) | unlaxer vs ANTLR/PEG.js/Tree-sitter comparison and @eval annotation design |
 
 ## Analysis
 
 | Document | Description |
 |----------|-------------|
-| [backend-coverage-matrix.md](./backend-coverage-matrix.md) | Backend coverage matrix for the 5 execution backends |
+| [backend-coverage-matrix.md](./backend-coverage-matrix.md) | Backend coverage matrix for the 6 execution backends |
 | [feature-parity-diff.md](./feature-parity-diff.md) | Feature parity diff between hand-written path and UBNF (P4) path |
 
 ## Other Documentation
diff --git a/docs/backend-coverage-matrix.md b/docs/backend-coverage-matrix.md
index c0ddfdd1..ffb20597 100644
--- a/docs/backend-coverage-matrix.md
+++ b/docs/backend-coverage-matrix.md
@@ -1,10 +1,11 @@
 # Backend Coverage Matrix
 
-## 5 Execution Backends
+## 6 Execution Backends
 
 | Backend | 実装クラス | 主要用途 |
 |---------|-----------|---------|
 | compile-hand | JavaCodeCalculatorV3 | 本番 (10^9 tx/month) |
+| compile-legacy-astcreator | LegacyAstCreatorJavaCodeCalculator | 凍結（リグレッション比較用）。JavaCodeCalculatorV3 を継承し tokenReduer() のみ override |
 | P4-typed | P4TypedAstEvaluator | DAP, LSP (sealed switch) |
 | P4-reflection | GeneratedP4ValueAstEvaluator | レガシー (reflection) |
 | ast-hand | AstNumberExpressionEvaluator | リテラル演算のみ |
@@ -12,30 +13,32 @@
 
 ## Feature Coverage
 
-| 機能 | compile-hand | P4-typed | P4-reflection | ast-hand | compile-dsl |
-|------|:-----------:|:--------:|:-------------:|:--------:|:-----------:|
-| 四則演算 (+,-,*,/) | ✅ | ✅ | ✅ | ✅ | ✅ |
-| 変数参照 ($var) | ✅ | ✅ | ✅ | ❌ | ✅ |
-| 比較演算 (==,<,>) | ✅ | ✅ | ✅ | ❌ | ✅ |
-| Boolean演算 (&,\|,^) | ✅ | ✅ | ✅ | ❌ | ✅ |
-| if/else | ✅ | ✅ | ✅ | ❌ | ✅ |
-| ternary (cond?a:b) | ✅ | ✅ | ✅ | ❌ | ✅ |
-| match/case | ✅ | ✅ | ✅ | ❌ | ✅ |
-| Math 14関数 | ✅ | ✅ | ❌ | ❌ | ❌ |
-| min/max 可変引数 | ✅ | ✅ | ❌ | ❌ | ❌ |
-| Not演算子 | ✅ | ✅ | ❌ | ❌ | ❌ |
-| toNum() | ✅ | ✅ | ❌ | ❌ | ❌ |
-| String methods (関数形式) | ✅ | ✅ | ❌ | ❌ | ❌ |
-| String methods (ドット形式) | ✅ | ✅ | ❌ | ❌ | ❌ |
-| String predicates | ✅ | ✅ | ❌ | ❌ | ❌ |
-| isPresent() | ✅ | ✅ | ❌ | ❌ | ❌ |
-| **MethodInvocation (call)** | ✅ | ✅ | ✅ | ❌ | ✅ |
-| **External呼び出し** | ✅ | ✅ | ✅ | ❌ | ✅ |
-| **Side effect** | ✅ | ✅ | **❌** | ❌ | ✅ |
-| 変数宣言 (var) | ✅ | 部分的 | ✅ | ❌ | ✅ |
-| String連結 (+) | ✅ | ✅ | ❌ | ❌ | ✅ |
-| String slice ($s[0:3]) | ✅ | ❌ | ❌ | ❌ | ❌ |
-| inTimeRange/inDayTimeRange | ✅ | ✅ | ❌ | ❌ | ✅ |
+| 機能 | compile-hand | compile-legacy-astcreator | P4-typed | P4-reflection | ast-hand | compile-dsl |
+|------|:-----------:|:------------------------:|:--------:|:-------------:|:--------:|:-----------:|
+| 四則演算 (+,-,*,/) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| 変数参照 ($var) | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| 比較演算 (==,<,>) | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| Boolean演算 (&,\|,^) | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| if/else | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| ternary (cond?a:b) | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| match/case | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| Math 14関数 | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| min/max 可変引数 | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| Not演算子 | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| toNum() | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| String methods (関数形式) | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| String methods (ドット形式) | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| String predicates | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| isPresent() | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+| **MethodInvocation (call)** | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| **External呼び出し** | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ |
+| **Side effect** | ✅ | ✅ | ✅ | **❌** | ❌ | ✅ |
+| 変数宣言 (var) | ✅ | ✅ | 部分的 | ✅ | ❌ | ✅ |
+| String連結 (+) | ✅ | ✅ | ✅ | ❌ | ❌ | ✅ |
+| String slice ($s[0:3]) | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
+| inTimeRange/inDayTimeRange | ✅ | ✅ | ✅ | ❌ | ❌ | ✅ |
+
+> **注**: `compile-legacy-astcreator` は `JavaCodeCalculatorV3` を継承し `tokenReduer()` のみを override する（`LegacyAstCreatorJavaCodeCalculator:15-33`）。Java コード生成能力は `compile-hand` と等価のため、Feature Coverage は `compile-hand` と同一。SPEC.md 1.3 に準拠（ステータス: 凍結・リグレッション比較用）。
 
 ## Fallback Chain