我正在使用来自ANTLR v4 repo here的Lexer和Parser来解析java中的mysql . 但是我在以下一行中的文件MySqlLexer.g4中出现错误here:
lexer grammar MySqlLexer;
channels { MYSQLCOMMENT, ERRORCHANNEL }
// SKIP
SPACE: [ \t\r\n]+ -> channel(HIDDEN);
SPEC_MYSQL_COMMENT: '/*!' .+? '*/' -> channel(MYSQLCOMMENT);
COMMENT_INPUT: '/*' .*? '*/' -> channel(HIDDEN);
LINE_COMMENT: (
('-- ' | '#') ~[\r\n]* ('\r'? '\n' | EOF)
| '--' ('\r'? '\n' | EOF)
) -> channel(HIDDEN);
First error:
语法错误:'{MYSQLCOMMENT,ERRORCHANNEL}'在匹配规则前言时给我一个完全的惊喜
Second error: (in "SPACE:" line)
语法错误:'('匹配规则前导码语法错误时,我感到非常惊讶:无关输入')'在匹配规则时期望SEMI
这是我用于检查我正在使用的版本的pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>autoGem</groupId>
<artifactId>autoGem</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>autoGem</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<antlr4.visitor>true</antlr4.visitor>
<antlr4.listener>true</antlr4.listener>
<target.jvm>1.6</target.jvm>
<antlr.version>4.7.1</antlr.version>
<antlr4test-maven-plugin.version>1.10</antlr4test-maven-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>antlr4-runtime</artifactId>
<version>${antlr.version}</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>${target.jvm}</source>
<target>${target.jvm}</target>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
<compilerArguments>
<Xlint />
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>target/generated-sources/antlr4</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.antlr</groupId>
<artifactId>antlr4-maven-plugin</artifactId>
<version>4.3</version>
<configuration>
<includes>
<include>MySqlLexer.g4</include>
<include>MySqlParser.g4</include>
</includes>
<visitor>true</visitor>
<listener>true</listener>
</configuration>
<executions>
<execution>
<id>antlr4</id>
<goals>
<goal>antlr4</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--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>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
我对ANTLR语法很新 . 请帮忙 .
谢谢 :)
1 回答
从终端,我下载了ANTLR4 JAR:
并下载了语法:
然后从这些语法生成词法分析器和解析器:
换句话说:它工作正常 . 你一定做错了 . 我的猜测是你正在使用ANTLR3
Tool
来生成词法分析器和解析器 .编辑
从你这里删除
pom.xml
:并将其替换为:
我测试了这个,它就像一个魅力 .