Re: Re[4]: [Haskell-cafe] In-place modification

On 15/07/07, Hugh Perkins wrote:

On 7/15/07, Hugh Perkins wrote:

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On 7/15/07, Sebastian Sylvan wrote:

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"unsafe"' here just means direct array indexing. Same as the other languages. Haskell's 'unsafe' is a little more paranoid that other languages.

Yes, I was kindof hoping it was something like that. Cool :-)

Errr ... wait... when you say "direct array indexing", you mean that this does or doesnt continue to do bounds checking on the array access?

I could imagine that it is "unsafe" simply because direct array indexing prevents mathematically proving that the program wont crash (?), or it could be unsafe in the C++ way, where going off the end of the array corrupts your stack/heap?

Well, *I* didn't say it but yes. Unsafe disables bounds checking (which in this case is safe). I think you can just stick an unsafe{} in the C# version to disable them. -- Sebastian Sylvan +44(0)7857-300802 UIN: 44640862