如何为ANTLR指定目标包？ [英] How to specify a target package for ANTLR?

问题描述

如果我打电话：

java org.antlr.Tool -o outdir sources/com/example/Java5.g

...使用antlr-3.1.3将在目录<$中生成解析器和词法分析器代码C $ C> OUTDIR /来源/ COM /示例。但是生成的类没有任何包语句。我需要它们在包中生活 com.example 。

...with antlr-3.1.3 the parser and lexer code will be generated in the directory outdir/sources/com/example. But the generated classes don't have any package statement. I need them to life in the package com.example.

有没有办法指定目标包？

Is there a way to specify the target package?

推荐答案

ANTLR提供了一个标题工具，允许您包含包和导入。您将此包含在* .g语法文件中：

ANTLR provides a header tool which allows you to include package and imports. You include this in your *.g grammar file:

@header {
    package org.xmlcml.cml.converters.antlr;
    import java.util.HashMap;
}

您也可能需要在Lexer中使用它：

And you may need it in the Lexer as well:

@lexer::header {package org.xmlcml.cml.converters.antlr;}

如果您需要添加一些会员和代码：

and in case you need to add some members and code:

@members {
    HashMap<String, Object> objectMap = new HashMap<String, Object>();
    //...

    private void addArrayValue(String content) {
    //... code required by snippets in the grammar

    }
}

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