So that you can easily find out what exactly is going on. Syntax error on line 1, character 13: The right-hand side of a rule is empty or starts with an empty alternative.Įmpty rules ( ::= ) and empty alternatives ( ::= | "foo") are not allowed.įinally, there are options to enable detailed debugging output that shows every reduction step and the program state In most cases you get a helpful error message if you get it wrong. Second, it offers good syntax error reporting for that language. With two extensions: weighted random selection and deterministic repetition. How does it achieve those goals? First, it uses a DSL for grammar definitions that is similar to the familiar BNF, Whether it's for parser fuzzing, research, worldbuilding, or pure amusement. To people other than programmers: writers, linguists, and anyone who may be interested in generating languages, The ultimate goal is to bring generative grammar tools Its goal is to make it easy to write and share grammars,Īnd to give the user total control and insight into the generation process. BNFGen is a random text generator based on context-free grammars.
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