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by vertex-four
4199 days ago
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> Then your proof would be rejected by the compiler. Only for some types of mistake, surely. If that was always the case, we'd have a compiler that could read minds. > As for whether you're proving the right thing or the wrong thing, a type system is no less helpful than a test suite. Really? I can write down in my test suite, "assert (add 1 1) == 2". Anyone can come along and look at that and make sure it matches the spec. We can add additional tests for various bounds, and possibly use a quickcheck-like tool in addition, and for 99.99% of use cases be happy and confident that we're at least writing the right thing. What's the type for that and does it actually have any resemblance to "the add function adds two numbers together", or do I have to read a couple of papers and have a background in university-level math to convince myself that the proof actually does what it says? |
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