Refer to http://stackoverflow.com/questions/30128961/trouble-setting-up-antlr-4-ide-on-eclipse-luna-4-4
From there, you have to do the following with your version of eclipse
- Install XText 2.7.3 (This particular version)
- Install ANTLR 4 IDE
- File->Import...->Existing Projects into Workspace
- Select project root
- Project -> Properties
- ANTLR 4 -> Tool
- Enable project specific settings
- Add->libs/antlr-4.5.3-complete.jar
- Ensure that your added jar is checkmarked
- Apply
This project uses visitors
- Project -> Properties
- ANTLR 4 -> Tool
- Enable project specific settings
- Ensure generate parse tree visitors are checkmarked
- Apply