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fuzzer for generative testing of ECMAScript parsers

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Now that ES6 is standardized, it would be awesome to be able to test tools by fuzzing ES6 code.

I appears to me that the fuzzer is biased towards rather small ast's. Sometimes its nice to assure that the size is somehow "growing" (might be useful in quick check...

A shrinking function should take a node and produce a list of nodes that are potentially easier for a human to consume. A good strategy: generate the leaf, something around...

enhancement

I don't know why it didn't hit me earlier that this is the job for a monad. This should be pretty simple, remove tons of duplication for nodes that don't...

enhancement

For this, we can use [inh3/nPool](https://github.com/inh3/nPool).

enhancement