22 Nov
2004
22 Nov
'04
5:36 p.m.
On Monday 22 November 2004 23:22, Keean Schupke wrote:
It seems to me that as unsafePerformIO is not in the standard and only implemented on some compilers/interpreters, that you limit the portability of code by using it, and that it is best avoided. Also as any safe use of unsafePerformIO can be refactored to not use it I could certainly live without it.
With one exception: If a foreign function (e.g. from a C library) is really pure, then I see no way to tell that to the compiler other than using unsafePerformIO. IIRC, unsafePerformIO is in the standard FFI libraries. Ben -- Top level things with identity are evil. -- Lennart Augustsson