Gradle 找不到 Antlr 令牌文件 [英] Gradle can't find Antlr token file

问题描述

我在 myproject/src/main/antlr/com/mypackage 中创建了一个文件 MyLexer.g4 像:

I created a file MyLexer.g4 inside myproject/src/main/antlr/com/mypackage like:

lexer grammar MyLexer;

DIGIT : '0' .. '9' ;

...

WS  : [ \t\r\n]+ -> skip ;

然后尝试在同一目录中的 MyParser.g4 中编写解析器:

and then trying to write parser in MyParser.g4 in the same directory:

grammar MyParser;

options
   { tokenVocab = MyLexer; }

SHORT_YEAR: DIGIT DIGIT;

不幸的是，当我运行 generateGrammarSource 的 gradle 任务时，出现以下错误:

unfortunately, when I run gradle task of generateGrammarSource, the following error occurs:

error(160): com\mypackage\MyParser.g4:4:18: cannot find tokens file MYPROJECT\build\generated-src\antlr\main\MyLexer.tokens

即文件在不正确的位置查找.

I.e. file is sought in incorrect place.

实际文件在 MYPROJECT\build\generated-src\antlr\main\com\mypackage\MyLexer.tokens 中创建

推荐答案

正如 Steven Spungin 所说，您需要将 ANTLR 源文件放在目录 src/main/antlr/ 中，而不是放在目录中该目录的子目录.

As Steven Spungin said, you need to put your ANTLR source files in the directory src/main/antlr/ and not in a subdirectory of that directory.

您不需要将 @header 添加到您的 ANTLR 源文件中.请改用以下内容.

You do not need to add the @header to your ANTLR source files. Use the following instead.

在您的 build.gradle 中，您应该具有(针对您的 ANTLR 版本进行修改):

In your build.gradle you should have (modified for your version of ANTLR):

apply plugin: 'antlr'

dependencies {
    antlr "org.antlr:antlr4:4.7.1"
}

generateGrammarSource {
    arguments += ['-package', 'com.mypackage']
    outputDirectory = new File(buildDir.toString() + "/generated-src/antlr/main/com/mypackage/")
}

这篇关于Gradle 找不到 Antlr 令牌文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！