【问题】
在折腾：
的过程中，运行
grun Hello r -tree
结果无任何输出：
D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>grun Hello r -tree D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java org.antlr.v4.runtime.misc.TestRig Hello r -tree |
【解决过程】
1.故意去把grun.bat改为：
java org.antlr.v4.runtime.misc.TestRig $* |
结果的确会出错：
D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java org.antlr.v4.runtime.misc.TestRig $* java org.antlr.v4.runtime.misc.TestRig GrammarName startRuleName [-tokens] [-tree] [-gui] [-ps file.ps] [-encoding encodingname] [-trace] [-diagnostics] [-SLL] [input-filename(s)] Use startRuleName='tokens' if GrammarName is a lexer grammar. Omitting input-filename makes rig read from stdin. Exception in thread "main" java.lang.NullPointerException at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at org.antlr.v4.runtime.misc.TestRig.process(TestRig.java:157) at org.antlr.v4.runtime.misc.TestRig.main(TestRig.java:142) |
但是很明显，可以看到其用法了。
2.所以自己手动试了试：
java org.antlr.v4.runtime.misc.TestRig Hello r –tree
但是结果还是无任何输出。
3.又试了试：
java org.antlr.v4.runtime.misc.TestRig Hello r –trace
结果也是无输出。
4.后来是，把当前的JDK7卸载了，重新安装JDK6，结果问题依旧，还是无任何输出：
D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java -version java version "1.6.0_37" Java(TM) SE Runtime Environment (build 1.6.0_37-b06) Java HotSpot(TM) Client VM (build 20.12-b01, mixed mode, sharing) D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java org.antlr.v4.Tool ANTLR Parser Generator Version 4.0 -o ___ specify output directory where all output is generated -lib ___ specify location of grammars, tokens files -atn generate rule augmented transition network diagrams -encoding ___ specify grammar file encoding; e.g., euc-jp -message-format ___ specify output style for messages in antlr, gnu, vs2005 -long-messages show exception details when available for errors and warnings -listener generate parse tree listener (default) -no-listener don't generate parse tree listener -visitor generate parse tree visitor -no-visitor don't generate parse tree visitor (default) -package ___ specify a package/namespace for the generated code -depend generate file dependencies -D<option>=value set/override a grammar-level option -Werror treat warnings as errors -XdbgST launch StringTemplate visualizer on generated code -XdbgSTWait wait for STViz to close before continuing -Xforce-atn use the ATN simulator for all predictions -Xlog dump lots of logging info to antlr-timestamp.log D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>dir Volume in drive D has no label. Volume Serial Number is CECE-859F Directory of D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello 01/22/2013 05:55 PM <DIR> . 01/22/2013 05:55 PM <DIR> .. 01/22/2013 03:49 PM 235 Hello.g4 1 File(s) 235 bytes 2 Dir(s) 226,168,115,200 bytes free D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>antlr4 Hello.g4 D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java org.antlr.v4.Tool Hello.g4 D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>javac Hello*.java D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>grun Hello r -tree D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java org.antlr.v4.runtime.misc.TestRig Hello r -tree Terminate batch job (Y/N)? ^C D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>grun Hello r -gui D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello>java org.antlr.v4.runtime.misc.TestRig Hello r -gui Terminate batch job (Y/N)? D:\DevRoot\IndustrialMobileAutomation\HandheldDataSetter\ANTLR\projects\demoHello> |
【总结】
实在不知道何故，所以只能另外再去试试antlr的ide了：
【记录】尝试使用ANTLRWorks 2.0去进行ANTLR开发
【后记 2013-07-05】
1.后续已经解决了，如何测试语法是否正确，可以输入测试内容的问题。