line 1:0 mismatched input 'package' expecting {IntegerLiteral, FloatingPointLiteral, BooleanLiteral, Character...

[Sidnio]

[kaby76]

Missing essential details:

• Parser: java8
• Input: input.txt

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8
$ trgen
C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/
Rendering template file from CSharp/Encodings.cs to Generated/Encodings.cs
Rendering template file from CSharp/ErrorListener.cs to Generated/ErrorListener.cs
Rendering template file from CSharp/makefile to Generated/makefile
Rendering template file from CSharp/Test.cs to Generated/Test.cs
Rendering template file from CSharp/Test.csproj to Generated/Test.csproj
Rendering template file from CSharp/test.sh to Generated/test.sh
Rendering template file from CSharp/tester.psm1 to Generated/tester.psm1
Copying source file from C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/Test.java to Generated/Test.java
Copying source file from C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/pom.xml to Generated/pom.xml
Copying source file from C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/Java8Parser.g4 to Generated/Java8Parser.g4
Copying source file from C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/Java8Lexer.g4 to Generated/Java8Lexer.g4
Copying source file from C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/input.txt to Generated/input.txt
Copying source file from C:/msys64/home/Kenne/big-index/grammars-v4/java/java8/CodepointRangeScanner.java to Generated/CodepointRangeScanner.java

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8
$ cd Generated/

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8/Generated
$ ls
CodepointRangeScanner.java  ErrorListener.cs  Java8Lexer.g4   makefile  Test.cs      Test.java  tester.psm1
Encodings.cs                input.txt         Java8Parser.g4  pom.xml   Test.csproj  test.sh

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8/Generated
$ make
dotnet restore
  Determining projects to restore...
  Restored C:\msys64\home\Kenne\big-index\grammars-v4\java\java8\Generated\Test.csproj (in 377 ms).
dotnet build
MSBuild version 17.4.0+18d5aef85 for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
  Test -> C:\msys64\home\Kenne\big-index\grammars-v4\java\java8\Generated\bin\Debug\net6.0\Test.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:11.39

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8/Generated
$ make test
bash test.sh
../examples/helloworld.java
CSharp 0 stdin success 0.5105612
../examples/instanceof.java
CSharp 0 stdin success 0.2999091
../examples/Receiver.java
CSharp 0 stdin success 0.0591327
../examples/Unicode.java
CSharp 0 stdin success 0.515561

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8/Generated
$ ./bin/Debug/net6.0/Test.exe ../input.txt
CSharp 0 ../input.txt success 0.5104357
Total Time: 0.5751392

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8/Generated
$ cat input.txt
package com.example.customviewedit;
public class tt {
  public static void main(String[] args) {
    System.out.println("dddddd");
  }
}

Kenne@DESKTOP-DL44R7B MINGW64 ~/big-index/grammars-v4/java/java8/Generated
$

The grammar and generated parser work fine.

lab.antlr.org also works just fine.

[kaby76]

And, it also works in Intellij.

The doc for the Antlr Intellij plugin is terrible though. It took me an hour to figure out how to use the extension/plugin years ago, and the doc still does not have clear, precise, enumerated steps to test a rule in a grammar. Follow these steps. 1) Clone the grammars-v4 repo. 2) Start Intellij and open .../grammars-v4/java/java8. The Project pane will be on the left and show all the files in the directory. 3) Double-click on "Java8Parser.g4" in the Project pane. This opens the file in a text pane on the right. 4) In the Project pane, right-click on "Java8Parser.g4", and in the pop-up menu, select "Generate ANTLR Recognizer". 5) In the text pane of Java8Parser.g4, scoll down in the text and locate the "compilationUnit" rule. 6) Right-click on the "compilationUnit" text in the text pane, and select "Test rule compilationUnit" in the pop-up menu. 7) In the Antlr Preview pane, enter the input. The result will be displayed.

[Sidnio]

而且，它也适用于Intellij。

Antlr Intellij插件的文档很糟糕。几年前，我花了一个小时才弄清楚如何使用扩展/插件，但该文档仍然没有清晰、精确、枚举的步骤来测试语法中的规则。请按照以下步骤操作。

1. 克隆语法 v4 存储库。
2. 启动 Intellij 并打开 .../grammars-v4/java/java8。“工程”窗格将位于左侧，并显示目录中的所有文件。
3. 双击“项目”窗格中的“Java8Parser.g4”。这将在右侧的文本窗格中打开文件。
4. 在“项目”窗格中，右键单击“Java8Parser.g4”，然后在弹出菜单中选择“生成 ANTLR 识别器”。
5. 在 Java8Parser.g4 的文本窗格中，向下搜索文本并找到“编译单元”规则。
6. 右键单击文本窗格中的“编译单元”文本，然后在弹出菜单中选择“测试规则编译单元”。
7. 在“Antlr 预览”窗格中，输入输入。将显示结果。

Java8Parser.g4

JavaParser.g4

JavaParser Ok