Re: [RFC] Internal operator overloading and GMP improvements

Hi, On Mon, May 13, 2013 at 1:24 PM, Nikita Popov <nikita.ppv@gmail.com> wrote: > On Mon, May 13, 2013 at 7:49 AM, Dmitry Stogov <dmitry@zend.com> wrote: > >> Hi Nikita, >> >> The patch looks quite good. >> However, it must slow down each comparison operator (even if it compares >> two integers). >> > In most cases it shouldn't, as the comparisons usually go through the > fast_is_*_functions, which have special handling for integers and doubles. > is_equal_function itself for example is only used in the implementation of > ZEND_CASE (why? shouldn't we use the fast_ one here too?) and stuff like > array_search. > Ahh, you are right :) > > I would suggest overloading of CMP operator instead of separate <, <=, ==, >> !=, >, >=. >> > > But yeah, that sounds like a better solution. The advantages I see: > a) It will automatically work with sorting functions (and other stuff > using compare_function). This is a pretty big plus. > b) You don't have to implement the same (or similar) code for four (or > six) operators. > c) It (at least partially) also solves the concerns raised by Sara. > I'm glad, you are agree :) > Would need an additional object handler though (as compare_objects works > only on objects, so it's currently not possible to support something like > $gmp == 0). > > Or may be we may introduce additional opcode (or even pseudo-opcode) ZEND_CMP to do it in the same way. Also it may be better to use a table of callbacks for each overloaded operand instead of single one that need to do switch anyway. Thanks. Dmitry. > Nikita >