1. Dislike of remainder(). Was: Re: No xor!!!
On Tue, 27 Oct 1998, Bown, John wrote:
> I particularly dislike the remainder() function and would love to see an
> in-built 'mod' function ala
>
> a = 9 mod 4 -- instead of a = remainder(9,4)
>
> Comparative operators ( >=, != etc ) should really be extended, in the
> same spirit, to cover all types without having to use the compare()
> function, ala
>
> a = "Alfred"
> b = "George"
> if ( a < b ) ....
I've been fiddling with David Cuny's preprocessor [I have this thing
about David's code it seems :)] so that infix functions (i.e. 3 + 4 rather
than +(3,4)) are possible. I've also tried to introduce some overloading
capability. Unfortunately, I've not had the spare time recently.
Anyway, here's some provisional syntax:
function infix is_the_same_as(object left, object right)
return compare({a}, {b})=0
end function
sequence S
atom A
S = {4,2}
A = s[1]*2
if {A,2} is_the_same_as S then -- ooh, shiny! :)
-- do something
end if
I haven't decided whether it's feasible to use symbols (hence overloading
them) yet. Another example:
function "="(sequence left, sequence right)
return compare(left, right)=0
end function
sequence S
atom A
S = {4,2}
A = s[1]*2
if {A,2} = S then --and again...
-- do something
end if
But overloading "=" in this way breaks existing code:
In Euphoria {4,2}={4,2} => {1,1} or {True, True}, not just True.
I think I prefer the former at the moment...
--
Carl R White -- Final Year Computer Science at the University of Bradford
E-mail...: cyrek- at -bigfoot.com -- Remove the hyphens before mailing. Ta :)
URL......: http://www.bigfoot.com/~cyrek/
Ykk rnyllaqur rgiokc cea nyemdok ymc giququezka caysgr -- B.Q.Vgesa
