How do I install the Antlr4 Dev skill?

Run npx skillmds@latest add tomevault-io/antlr4-dev in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Antlr4 Dev skill do?

ANTLR4前端开发专家，专注于词法/语法分析、AST构建、访问者模式。 Use when this capability is needed. It is listed under Coding & Dev Tools on SkillMD.

Is Antlr4 Dev safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Antlr4 Dev?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Antlr4 Dev free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Antlr4 Dev?

tomevault-io (@tomevault-io) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Antlr4 Dev by tomevault-io — Agent Skill

Name: Antlr4 Dev
Author: tomevault-io

File contents

ANTLR4前端开发

🎯 垂直职责

单一职责: ANTLR4语法设计、词法/语法分析、AST构建、访问者模式

📦 核心能力

1. 语法文件开发

位置: ep20/src/main/antlr4/org/teachfx/antlr4/ep20/parser/Cymbol.g4
语法结构: lexer规则 → parser规则 → AST构建
重新生成: mvn generate-sources -pl ep20

2. AST节点实现

基类: ASTNode.java (位于 ep20/src/main/java/org/teachfx/antlr4/ep20/ast/)
模式: 访问者模式 accept(ASTVisitor<T>)
扩展: 创建新节点继承 ExprNode / StmtNode

3. 访问者模式

// 新节点标准实现
public class NewStmtNode extends StmtNode {
    private final Type field;

    public NewStmtNode(Type field) {
        this.field = field;
    }

    @Override
    public <T> T accept(ASTVisitor<T> visitor) {
        return visitor.visitNewStmt(this);
    }
}

🔗 关系图

→ ep-navigator (识别EP范围) ← compiler-dev (AST → IR转换)

🚀 快速开始

添加新语法特性

# 1. 编辑 Cymbol.g4
vim ep20/src/main/antlr4/.../parser/Cymbol.g4

# 2. 重新生成解析器
mvn generate-sources -pl ep20

# 3. 创建AST节点
vim ep20/src/main/java/.../ast/NewNode.java

# 4. 更新AST构建器
vim ep20/src/main/java/.../pass/ast/CymbolASTBuilder.java

# 5. 测试
mvn test -pl ep20 -Dtest="*ParserTest"

调试语法冲突

# 使用TestRig可视化语法树
java -cp "antlr-4.13.2-complete.jar:ep20/target/classes" \
  org.antlr.v4.gui.TestRig Cymbol file -gui test.cymbol

# 诊断冲突
mvn generate-sources -pl ep20 -Xantlr4.show-dfa

📚 Cymbol语法速查

类型	规则	示例
变量声明	`declaration`	`int x;`
函数定义	`functionDef`	`int add(int a, int b) { ... }`
结构体	`structDef`	`struct Point { int x; int y; }`
数组	`type '[' expr? ']'`	`int[10] arr;`
控制流	`ifStmt / whileStmt`	`if (x > 0) { ... }`

🛠️ 常用命令

# 语法相关
mvn generate-sources -pl ep20              # 重新生成解析器
mvn test -pl ep20 -Dtest="*Lexer*"         # 测试词法
mvn test -pl ep20 -Dtest="*Parser*"        # 测试语法

# AST相关
mvn test -pl ep20 -Dtest="*AST*"           # 测试AST构建
mvn test -pl ep20 -Dtest="*Visitor*"       # 测试访问者

# 完整前端
mvn compile -pl ep20 && mvn test -pl ep20  # 编译并测试前端

⚠️ 常见问题

问题	原因	解决方案
语法冲突	左递归/歧义	重构规则，使用语义谓词
AST未生成	忘记运行generate-sources	`mvn generate-sources -pl ep20`
访问者空指针	新节点未实现accept()	添加 `accept(ASTVisitor<T>)`

版本: v1.0 | 垂直职责: ANTLR4前端 | 2025-12-23

Converted and distributed by TomeVault — claim your Tome and manage your conversions.

---name: antlr4-devdescription: ANTLR4前端开发专家，专注于词法/语法分析、AST构建、访问者模式。 Use when this capability is needed.---# ANTLR4前端开发## 🎯 垂直职责**单一职责**: ANTLR4语法设计、词法/语法分析、AST构建、访问者模式## 📦 核心能力### 1. 语法文件开发- **位置**: `ep20/src/main/antlr4/org/teachfx/antlr4/ep20/parser/Cymbol.g4`- **语法结构**: lexer规则 → parser规则 → AST构建- **重新生成**: `mvn generate-sources -pl ep20`### 2. AST节点实现- **基类**: `ASTNode.java` (位于 `ep20/src/main/java/org/teachfx/antlr4/ep20/ast/`)- **模式**: 访问者模式 `accept(ASTVisitor<T>)`- **扩展**: 创建新节点继承 `ExprNode` / `StmtNode`### 3. 访问者模式```java// 新节点标准实现public class NewStmtNode extends StmtNode { private final Type field; public NewStmtNode(Type field) { this.field = field; } @Override public <T> T accept(ASTVisitor<T> visitor) { return visitor.visitNewStmt(this); }}```## 🔗 关系图→ **ep-navigator** (识别EP范围)← **compiler-dev** (AST → IR转换)## 🚀 快速开始### 添加新语法特性```bash# 1. 编辑 Cymbol.g4vim ep20/src/main/antlr4/.../parser/Cymbol.g4# 2. 重新生成解析器mvn generate-sources -pl ep20# 3. 创建AST节点vim ep20/src/main/java/.../ast/NewNode.java# 4. 更新AST构建器vim ep20/src/main/java/.../pass/ast/CymbolASTBuilder.java# 5. 测试mvn test -pl ep20 -Dtest="*ParserTest"```### 调试语法冲突```bash# 使用TestRig可视化语法树java -cp "antlr-4.13.2-complete.jar:ep20/target/classes" \ org.antlr.v4.gui.TestRig Cymbol file -gui test.cymbol# 诊断冲突mvn generate-sources -pl ep20 -Xantlr4.show-dfa```## 📚 Cymbol语法速查| 类型 | 规则 | 示例 ||------|------|------|| 变量声明 | `declaration` | `int x;` || 函数定义 | `functionDef` | `int add(int a, int b) { ... }` || 结构体 | `structDef` | `struct Point { int x; int y; }` || 数组 | `type '[' expr? ']'` | `int[10] arr;` || 控制流 | `ifStmt / whileStmt` | `if (x > 0) { ... }` |## 🛠️ 常用命令```bash# 语法相关mvn generate-sources -pl ep20 # 重新生成解析器mvn test -pl ep20 -Dtest="*Lexer*" # 测试词法mvn test -pl ep20 -Dtest="*Parser*" # 测试语法# AST相关mvn test -pl ep20 -Dtest="*AST*" # 测试AST构建mvn test -pl ep20 -Dtest="*Visitor*" # 测试访问者# 完整前端mvn compile -pl ep20 && mvn test -pl ep20 # 编译并测试前端```## ⚠️ 常见问题| 问题 | 原因 | 解决方案 ||------|------|----------|| 语法冲突 | 左递归/歧义 | 重构规则，使用语义谓词 || AST未生成 | 忘记运行generate-sources | `mvn generate-sources -pl ep20` || 访问者空指针 | 新节点未实现accept() | 添加 `accept(ASTVisitor<T>)` |---*版本: v1.0 | 垂直职责: ANTLR4前端 | 2025-12-23*---> Converted and distributed by [TomeVault](https://tomevault.io/claim/whtoo) — claim your Tome and manage your conversions.

Frequently asked questions

Antlr4 Dev