Re: How does Math::GMP overload the assignment operator ? (more guessing)

Just a guess: did you check fallback ?

UPDATE

Another guess: I look into the sources (Perl side only) and saw that Math::GMP overloads numification where Math::GMPz doesn't.

"0+" => sub { $_[0] >= 0 ? uintify($_[0]) : intify($_[0]) },

Cheers Rolf
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Re^2: How does Math::GMP overload the assignment operator ? (more guessing) by syphilis (Archbishop) on Nov 08, 2020 at 08:48 UTC
`"0+" => sub { $_[0] >= 0 ? uintify($_[0]) : intify($_[0]) },` I don't think it's related to my particular problem, but it's an interesting case. Which operator is being overloaded here ? Is it overloading 'int' ? I actually wonder if that's a useful feature, but I won't rush to an assessment on that until I've found out a bit more about it. Cheers, Rob	[reply] [d/l]
Re^3: How does Math::GMP overload the assignment operator ? (more guessing) by jcb (Parson) on Nov 09, 2020 at 03:15 UTC
That is overloading numeric conversion. That `sub` will be called whenever an object is used in a context that expects a number.	[reply] [d/l]
Re^4: How does Math::GMP overload the assignment operator ? (more guessing) by syphilis (Archbishop) on Nov 09, 2020 at 14:36 UTC
That sub will be called whenever an object is used in a context that expects a number. The only way I can find of having that sub called is by doing `int($obj)`. Do you have an example of another way ? On Windows (where sizeof(long) is 4): `C:\>perl -MMath::GMP -le "print int(Math::GMP->new(311) 100);" 385227681` [download] Math::GMPz achieves the same result with: `C:\>perl -MMath::GMPz=":mpz" -le "print Rmpz_get_ui(Math::GMPz->new(31 +1) 100);" 385227681 alternatively: C:\>perl -MMath::GMPz -le "$x = (Math::GMPz->new(311) ** 100) & 429496 +7295; print $x;" 385227681` [download] though, in this very last example, $x is a Math::GMPz object, not an IV. Cheers, Rob	[reply] [d/l] [select]
Re^5: How does Math::GMP overload the assignment operator ? (more guessing) by jcb (Parson) on Nov 10, 2020 at 04:09 UTC
Re^6: How does Math::GMP overload the assignment operator ? (more guessing) by syphilis (Archbishop) on Nov 10, 2020 at 11:52 UTC
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