我想生成 Pascal
java 解析器,然后在我的 gradle
应用程序中使用它。
对于 Pascal
我使用了这个语法
https://github.com/antlr/grammars-v4/tree/master/pascal
我的 build.gradle
看起来像这样。我使用了 antlr
插件。
apply plugin: 'groovy'
apply plugin: 'antlr'
repositories {
jcenter()
}
dependencies {
compile 'org.codehaus.groovy:groovy-all:2.4.6'
compile 'org.antlr:antlr4:4.5.3'
testCompile 'org.spockframework:spock-core:1.0-groovy-2.4'
testCompile 'junit:junit:4.12'
}
但是当我尝试运行任务时 generateGrammarSource
我得到这个错误
:generateGrammarSource
L:\app\src\main\antlr\pascal.g4:36:1: unexpected token: grammar
error: Token stream error reading grammar(s):
L:\app\src\main\antlr\pascal.g4:804:8: expecting ''', found '='
L:\app\src\main\antlr\pascal.g4:36:1: unexpected token: grammar
error: Token stream error reading grammar(s):
L:\app\src\main\antlr\pascal.g4:804:8: expecting ''', found '='
L:\app\src\main\antlr\pascal.g4:36:1: rule grammar trapped:
L:\app\src\main\antlr\pascal.g4:36:1: unexpected token: grammar
TokenStreamException: expecting ''', found '='
:generateGrammarSource FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':generateGrammarSource'.
> There was 1 error during grammar generation
> ANTLR Panic: TokenStreamException: expecting ''', found '='
这是什么问题?
最佳答案
来自 https://docs.gradle.org/current/userguide/antlr_plugin.html#sec:antlr_dependency_management 的插件文档
“antlr:antlr:2.7.7 将用作默认值。”
要更改它,只需说出要使用的版本,如下所示
dependencies {
//antlr "org.antlr:antlr:3.5.2" // use ANTLR version 3
antlr "org.antlr:antlr4:4.5" // use ANTLR version 4
}
关于java - antlr 对 pascal 语法的 panic ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36338445/