Antlr v4语法是否依赖于jar版本?

时间:2014-12-22 21:11:53

标签: eclipse maven-plugin antlr4

我遇到了在Eclipse中使用antlr-4.4-complete.jar在v4语法中嵌入动作的问题。

当使用4.4 jar从ant生成识别器时,生成器会发出一条消息,“规则的未知属性'文本'......”

操作可以像{System.out.println($ rule.text);}

一样简单

如果我使用antlr-4.0-complete.jar,我的ant构建工作正常。

当我发现这条评论最近发布给我时,我的怀疑被激起了 Antlr 4 book errata:

#77534: When I run antlr4 on Simple.g4 I get the error message:
error(65): Simple.g4:18:52: unknown attribute text for rule stat in $stat.text 
error(65): Simple.g4:20:54: unknown attribute text for rule stat in $stat.text 

正在寻找一种验证问题并改善工作流程的方法我认为我会尝试使用maven。

如果antlr4-maven-plugin版本设置为4.3,下面的片段会报告“未知属性'文本'”消息。如果antlr4-maven-plugin版本设置为4.2,它将成功构建代码。

另一个问题:

.tokens不是在目标包目录中生成的,而是在generated-sources / antlr4目录中创建的,但插件文档说明(在使用库目录下):

  

任何语法的.tokens文件都是在与.java文件相同的输出目录结构中生成的。

  

该插件将...在输出目录target / generated-sources / antlr4 / org / foo / bar中生成.java和.tokens文件。

我错过了配置参数吗?

<plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.0</version> <configuration> <source>6</source> <target>6</target> <showWarnings>true</showWarnings> <showDeprecation>true</showDeprecation> <compilerArguments> <Xlint /> </compilerArguments> </configuration> </plugin> <plugin> <groupId>org.antlr</groupId> <artifactId>antlr4-maven-plugin</artifactId> <version>4.2</version> <configuration> <sourceDirectory>src/antlr4</sourceDirectory> </configuration> <executions> <execution> <goals> <goal>antlr4</goal> </goals> </execution> </executions> </plugin> </plugins> <pluginManagement> <plugins> <plugin> <groupId>org.antlr</groupId> <artifactId>antlr4-maven-plugin</artifactId> <version>4.3</version> </plugin> <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself. --> <plugin> <groupId>org.eclipse.m2e</groupId> <artifactId>lifecycle-mapping</artifactId> <version>1.0.0</version> <configuration> <lifecycleMappingMetadata> <pluginExecutions> <pluginExecution> <pluginExecutionFilter> <groupId>org.antlr</groupId> <artifactId>antlr4-maven-plugin</artifactId> <versionRange>[4.0,)</versionRange> <goals> <goal>antlr4</goal> </goals> </pluginExecutionFilter> <action> <execute> <runOnIncremental>true</runOnIncremental> </execute> </action> </pluginExecution> <pluginExecution> <pluginExecutionFilter> <groupId>org.codehaus.mojo</groupId> <artifactId> build-helper-maven-plugin </artifactId> <versionRange>[1.7,)</versionRange> <goals> <goal>add-source</goal> </goals> </pluginExecutionFilter> <action> <ignore></ignore> </action> </pluginExecution> </pluginExecutions> </lifecycleMappingMetadata> </configuration> </plugin> </plugins>
<plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.0</version> <configuration> <source>6</source> <target>6</target> <showWarnings>true</showWarnings> <showDeprecation>true</showDeprecation> <compilerArguments> <Xlint /> </compilerArguments> </configuration> </plugin> <plugin> <groupId>org.antlr</groupId> <artifactId>antlr4-maven-plugin</artifactId> <version>4.2</version> <configuration> <sourceDirectory>src/antlr4</sourceDirectory> </configuration> <executions> <execution> <goals> <goal>antlr4</goal> </goals> </execution> </executions> </plugin> </plugins> <pluginManagement> <plugins> <plugin> <groupId>org.antlr</groupId> <artifactId>antlr4-maven-plugin</artifactId> <version>4.3</version> </plugin> <!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself. --> <plugin> <groupId>org.eclipse.m2e</groupId> <artifactId>lifecycle-mapping</artifactId> <version>1.0.0</version> <configuration> <lifecycleMappingMetadata> <pluginExecutions> <pluginExecution> <pluginExecutionFilter> <groupId>org.antlr</groupId> <artifactId>antlr4-maven-plugin</artifactId> <versionRange>[4.0,)</versionRange> <goals> <goal>antlr4</goal> </goals> </pluginExecutionFilter> <action> <execute> <runOnIncremental>true</runOnIncremental> </execute> </action> </pluginExecution> <pluginExecution> <pluginExecutionFilter> <groupId>org.codehaus.mojo</groupId> <artifactId> build-helper-maven-plugin </artifactId> <versionRange>[1.7,)</versionRange> <goals> <goal>add-source</goal> </goals> </pluginExecutionFilter> <action> <ignore></ignore> </action> </pluginExecution> </pluginExecutions> </lifecycleMappingMetadata> </configuration> </plugin> </plugins>

1 个答案:

答案 0 :(得分:2)

从Antlr 4.3发行说明中,在重大变化下:

  

在嵌入式操作或语义谓词中,对封闭规则的引用不能再写为$ ruleName。而是使用特殊符号$ ctx来引用封闭规则。在此更改之前已经从语法生成的解析器不受影响,但在使用ANTLR 4.3生成代码之前,需要更新语法。作为纠正#571的一部分,需要进行此更改。

从antlr 4.3开始,以$ rule.text形式访问文本属性的操作需要更改为$ ctx.getText();

我想我必须更好地掌握我的工具。

我最近下载的Antlr 4示例中没有注意到这种变化。