Peter Eisentraut wrote:
On mån, 2009-12-21 at 14:46 -0500, Andrew Dunstan wrote:
BTW, this should arguably not be an immutable function. You could
replace the perl library, so it's not solely dependent on the input
for
the result.
By this logic, no function could be immutable, because you could replace
the C library or parts of the kernel.
*shrug* Maybe, OTOH upgrading perl is not such an unusual operation, and
doing so *will* affect this value. It's a bit hard to see why one would
want the perl version to be immutable. It doesn't look like it would be
much use in an index ....
I think people are generally safer not marking functions immutable
unless they actually need them to be.
cheers
andrew
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