Chatterbox

Generates text based on a context-free grammar.

For example, given this grammar:

start -> "The" _ <noun> _ "is" _ <adj> "." | "A" _ <adj> _ <noun> "." ;
noun -> "house" | "cat" ;
adj -> "green" | "big" ;

will generate one of the following:

The house is green.
The house is big.
The cat is green.
The cat is big.
A big house.
A big cat.
A green house.
A green cat.

The full example listing:

const { parse, validate, generate } = require("@aradzie/chatterbox");

const grammar = parse(`
start ->
    "The " <noun> " is " <adj> "."
  | "A " <adj> " " <noun> "."
  ;
noun ->
    "house"
  | "cat"
  ;
adj ->
    "green"
  | "big"
  ;
`);

validate(grammar);

console.log(generate(grammar));

This project is based on book Dive Into Python which included an example of how to generate mock philosophy based on a context-free grammar. I had a good laugh reading mock Kant passages:

The noumena are the clue to the discovery of, therefore,our judgements. I assert, certainly, that the architectonic of human reason is just as necessary as, therefore, our concepts; still, the things in themselves are the clue to the discovery of, in the case of necessity, the never-ending regress in the series of empirical conditions. It must not be supposed that the paralogisms, irrespective of all empirical conditions, can be treated like the thing in itself, as is shown in the writings of Galileo. In the case of the transcendental aesthetic, the Categories are just as necessary as, in other words, our faculties, by virtue of pure reason. (The phenomena can not take account of the Ideal of practical reason, and the Ideal of practical reason is a representation of time.) Necessity would thereby be made to contradict, in the case of the thing in itself, the thing in itself, yet the transcendental unity of apperception constitutes the whole content for philosophy.

I ported the original grammar XML files to a new syntax which is more readable. The files are available in the grammar directory.