Show HN: A syntax-diagram generator for rust's macro_rules()

dleslie 7 years ago |

Try feeding the Java-ish Rust macro[0] into it, which was featured on HN last week.

> Failed to parse, and I didn't even write an error-handler. Anyway:

> ParseError(None)

killercup 7 years ago | |

htor 7 years ago | |

do you mean to say there's a rust macro that lets you type java in rust? that's a horrible thing to invent! un-invent! exterminate at once!

dleslie 7 years ago | | |

There is, sort-of, and the macro appears to kill this tool. ;)

phyzome 7 years ago |

Nothing happens, and I see this in the developer console:

  ReferenceError: WebAssembly is not defined

Does this need some kind of special browser?

Something1234 7 years ago | |

Are you running the latest firefox? Works for me, but I don't see anything special about it.

phyzome 7 years ago | | |

Yes, I'm using the latest Firefox on my update channel (ESR), namely 52.9.0. It's up to date.

LawnGnome 7 years ago | | |

WebAssembly is explicitly disabled on the ESR version of Firefox 52, per https://www.caniuse.com/#search=webassembly, so that would explain that.

chc 7 years ago | |

I've tried this in Firefox and Chrome both for macOS and Android and it works in all cases.

ChickeNES 7 years ago |

Too bad you can't do the inverse: graphically lay out a syntax-diagram and get a macro_rules!() block back...