This is a rough golang implementation of
https://github.com/bkiers/tiny-language-antlr4
This helps to learn how to use golang as target language of antlr4
go generate
go run main.go
.vscode/launch.json can be used by antlr4 vscode plugin
https://marketplace.visualstudio.com/items?itemName=mike-lischke.vscode-antlr4
Save .g4 file at least once for generating interpreter data used for debugging