javacc | parser generator for building parsers | Parser library

i use JavaCC for parsing my script... I have something like this in my *.jj

I am building a gradle project which has a javacc parser file (i.e a file with .jj extension) Therefore, to execute this .jj file we need to run 3 commands in the terminal as javacc filename.jj javac *.java java parsername

However, I want to know how to edit the build.gradle, so that whenever the user enters ./gradlew build all the above mentioned commands would be automatically executed.

I am recently learning javacc releated concepts and writing tokens and parser. I was able to write a parser and it works perfectly when I run in the terminal using the commands javacc BusParser.jj //BusParser is file name javac *.java java Calculator //Calculator is parser name //and then type input

Here I am passing an input file when running the parser file

Here I want to know how to call this parser file from the another separate java class, so that we can verify the user input matches with the expected format.

The parser file is given here:

I have started learning javacc parser recently. I was requested to write a parser in which a token takes numbers from 1 to many and another token which take numbers from 2 to many Therefore I came up with something like this:

Can you help me find the way to solve this problem?

I'm realizing a parser with JavaCC able to read and put in a tree structure this kind of search expression

I built a lexer and a parser, using JavaCC, for a small programming language. An example of a valid program in the programming language is:

I'm trying to parse expressions from the Jakarta Expression Language. In summary, it is a simplified Java expressions, with addition of a few things:

• Support for creating maps like: {"foo": "bar"}
• Support for creating lists and sets like: [1,2,3,4] {1,2,3,4}
• Use some identifiers instead of symbols, like: foo gt bar (foo > bar), foo mod bar(foo % bar), and so on.

I'm struggling in the last bit, where it always understands the "mod", "gt", "ge" as identifiers instead of using the expression that has the "%", ">", ">=".

I'm new to ANTLR. My grammar is based on the Java grammar in the https://github.com/antlr/grammars-v4/tree/master/java/java and the JavaCC provided by: https://jakarta.ee/specifications/expression-language/4.0/jakarta-expression-language-spec-4.0.html#collected-syntax

I have a javaCC rule for identifier_chain (fully qualified name) as:

I have a JavaCC grammar with a troublesome section that can be reduced to this: