dk.brics.grammar

dk.brics.grammar is a Java-based piece of software that includes a parser and an ambiguity analyzer for context-free grammars. Everything is compiled into a single JAR archive, and the program comes with a graphical user interface while also being usable from the command console.

First of all, you need to make sure Java is installed on your computer, as it is required for the application to run. Once you have launched the program, you will be able to load grammar and text files directly from your disk or from a URL. You can also select the preferred encoding or just stick to the default one.

Next, there are a few parameters that you can customize before starting an analysis. You can specify whether the verbose output should be generated, whether the abstract syntax tree should be output, and so on.

When everything is configured, you can start checking the grammar, parsing the text and analyzing the grammar’s ambiguity. The results will be displayed in the Output panel.

If you wish to view parse trees when using the GUI version, you will need to download Graphviz as well. Of course, users also have the option of using the application directly from the command console.