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Ask HN: Do you know of a browser based DSL development tool?

5 points by all2 ↗ HN
I don't know where I found it, and I cannot find the link in my history. I'm dumbfounded that I didn't submit it to HN.

The tool had a two pane interface, one for the grammar and one for the language you were targeting. I remember that there were multiple interesting programming tools (one for music?!) implemented in the browser.

I have no clue what the name is, and it doesn't show up in search engines under obvious-to-me search terms.

4 comments

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undefeated
I've never heard of such a thing, but it sounds amazing!

Out of curiosity: How exactly did it work (for users)? I assume you'd write a grammar on the one pane, but how did you teach the tool to convert it into the output language? Was that embedded into the grammar?

all2
It was a BNF or EBNF grammar specified in a pane, or in a file. The save function didn't work when I used it, so I copied and pasted from a local text file. The tool consumed the grammar and produced a method/function call for the parser.

One of the cool things about it was that it did parse-as-needed, where you could change a rule and it would only reparse that rule.

undefeated
Was it only a BNF parser generator or did it also help with implementing the language's actual functionality?