This is a project in building an actual SLR parser generator. I must tell in advance: I made this application some months ago. Thus I do not remember all the details. The application is written in a mix of F# and JS. Add to that HTML, CSS and even some C# for page implementation, and you have a quite tiresome programming experience. Hence I will describe this project mostly in general terms.
This application is not available to run on this webpage. This is so due to the fact that big grammars can cause a tremendous workload on my poor server. So in order to use it you have to clone the whole git repo and run it off line.
The application is fairly complex. The whole process of generations is as described in Prop2Table - Parsing Input. The application seems to work properly in the realm of SLR parsing - SLR parsers have limits to what abstract syntax they can handle. More on that later.
SLR-parsing have limits. If you are looking for a more expressive type of parser generator, you can take a look at the famous YACC Parser Generator. The original YACC is for the C programming language, I think. But there ought to be implementations that target most popular languages.