antlr | 学习antlr的一些样例程序 - | Apps library

I'm using ANTLR 4 and have a fairly complex grammar. I'm trying to simplify here...

Given an expression like: true and or false I want a parsing error since the operands defined expect expressions on either side and this has an expr operand operand expr

My reduced grammar is:

I'm currently learning Antlr4. There is an example in the Doc that I tried to run:

I'm creating a language via ANTLR that I'd like to publish for user to use.

Are there a tool to create automated or semi-automated documentation for my language ?

I'm looking to make a documentation like

• https://www.tradingview.com/pine-script-reference/
• https://doc.rust-lang.org/edition-guide/index.html

I have a scannerless parser grammar utilizing the CharsAsTokens faux lexer which generates a usable Java Parser class for ANTLR4 versions through 4.6. But when updating to ANTLR 4.7.2 through 4.9.3-SNAPSHOT, the tool generates code producing dozens of compilation errors from the same grammar file, as detailed below.

My question here is simply: Are scannerless parser grammars no longer supported, or must their character-based terminals be specified differently in 4.7 and beyond?

Update:

Unfortunately, I cannot post my complete grammar here as it is derived from FOUO security marking guidance, access to which is retricted by the U.S. government (I am a DoD/IC contractor).

The incompatible upgrade issue however is entirely reproducible with the CSQL.g4 scannerless parser grammar example referred to by Ter in Section 5.6 of The Definitive ANTLR 4 Reference.

As does my grammar, the CSQL example uses CharsAsTokens.java for its tokenizer, and CharVocab.tokens as its token vocabulary.

Note that every token name is specified by its ASCII character-literal equivalent, as in:

Firstly: Yes, i know there's lots of this question already asked but no one really helped me much.

Secondly:

-I've tried making a simple Auth with my username+password from MySQL credentials into the Postman but didn't worked

I've tried to remove the cookies from postman and that did not work.

Description:

link where i got the idea: youtube link for this crud web app

I'm trying to develop an simple CRUD web app with Spring Boot, Lombok, JPA and Hibernate, MySQL. Everytime i try to make a POST request into Postman it doesn't give me anything(401 Unathorized), as shown here:

It only gives me "401 Unauthorized".

Of course when i run the project it gives me the DB shown in MYSQL

Here's the project content:(That YML file has nothing in it)

Here's some code:

application.properties

Recently updated the macOS to Bigsur and as part of the update, I also updated the packages through homebrew. My coc.nvim plugin was not working so, I reinstalled the package. And after that, I am unable to see the color of my scheme (gruvbox) which is also installed as a plugin. Now the screen is all grey with the dark background (the background was dark even previously). I am attaching the vim settings for clarification. The syntax setting is enabled and it is rightly picking erlang, the termguicolors is set as well. I am using mac terminal to invoke vim.

I have a scannerless security markings conversion grammar that generates code correctly and runs fine using antlr-4.4-complete.jar. But when I upgrade to antlr4-4.6-complete.jar or newer, code generation fails with "error(50): <.g4 file path>::: syntax error: mismatched character ':' expecting '{'" and other errors.

What changed in ANTLR v4.6 (or possibly v4.5 as I haven't tried that version) that would cause its lexer to err on grammars recognized by v4.4?

Sorry I can't provide a grammar snippit here, but access to the code is restricted.

I have an application using Boot Strap running with cassandra 4.0, Cassandra java drive 4.11.1, spark 3.1.1 into ubuntu 20.4 with jdk 8_292 and python 3.6.

When I run a function that it call CQL by spark, the tomcat gave me the error bellow.

Stack trace:

I am new to Antlr4 and trying to generate a parser for PL/SQL with the g4 file I downloaded from Github. However, I encounter a problem while using the auto-generated codes in IntellJ IDEA with the Antlr plugin. I have the parser file in my directory but it still pops up errors stating that cannot resolve symbol 'PlSqlParser'. What should I do with it to fix this error?

Cannot resoleve symbol

PlSqlParser in the directory