This folder contains the source code and some support files of unit tests for the code completion core. There are 2 grammars from which parsers + lexer were generated. One grammar is a very simple expression grammar, while the other one (CPP14.g4) has been downloaded from the ANTLR4 grammar directory.
You can easily regenerate the parser and lexers by running:
npm run-script generatefrom the root folder of the module. It requires the antlr4ts node module, which is installed when you run npm install first.