Re: [RFC] Integer Semantics

On Wed, Aug 20, 2014 at 1:20 PM, Andrea Faulds <ajf@ajf.me> wrote: > > On 20 Aug 2014, at 06:52, Dmitry Stogov <dmitry@zend.com> wrote: > > > 1) INF conversion to zero seems wrong. May be +INF should be converted > to MAX_LONG and -INF to MIN_LONG? > > I think of Infinity as more of an error value than an actual number. Not > using MAX_LONG and MIN_LONG means it casts to the same value matter how > large the integer type is, and it happens to be what JavaScript casts > Infinity to. There’s also the fringe benefit that 1/0’s result in PHP, > FALSE, casts to zero, as Infinity now would also, which is the standard > IEEE 754 result for 1/0. > > > 3) a bit unrelated, but it also may make sense to introduce a logical > right shift operator (>>> in Java) > The difference between "arithmetic" and "logical" shift is sign propagation.. 0x10000000 >> 1 == 0x11000000 0x10000000 >>> 1 == 0x01000000 In C the same >> operator perform "arithmetic" shift for signed numbers and "logical" shift for unsigned. Thanks. Dmitry. > > How would that function? > -- > Andrea Faulds > http://ajf.me/ > > > > >