Re: Math::BigInt::GMP - direct access to the gmp integer value

Probably, there's no elegant solution here. Math::BigInt::GMP encapsulates the mpz_t opaquely; is extending that not an option? I've no idea how perl modules should handle data sharing with friends.

Anyway, adding multiple magic is very simple with silly code:

use Math::BigInt only => 'GMP';
use Devel::Peek;

$$_ =~ m//g, Dump $_ for Math::BigInt->new(1)->{value};
[download]

Without the mg_virtual test your code would return NULL, and probably crash somewhere. That's the sort of thing that gives XS its bad rep. :|

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Re^2: Math::BigInt::GMP - direct access to the gmp integer value by syphilis (Archbishop) on Jan 11, 2016 at 23:41 UTC
Without the mg_virtual test your code would return NULL, and probably crash somewhere I haven't yet managed to get that to happen. Perhaps I'm just not trying hard enough. (Note to self: investigate what happens if NULL gets returned.) Update: Just tested what happens if NULL gets returned, and it's fine - just falls through to the slower overloading via stringification. The fun will start when a non-NULL (but incorrect) pointer gets returned. Current state of this code is to be found in the Math::GMPz module on github: `git clone git@github.com:sisyphus/math-gmpz Math-GMPz` [download] The code in question is the C code (in GMPz.xs) that pertains to the overloading of operations with Math::BigInt objects - which is most of the overload_* subs in GMPz.xs. Cheers, Rob	[reply] [d/l]

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Re^2: Math::BigInt::GMP - direct access to the gmp integer value
by syphilis (Archbishop) on Jan 11, 2016 at 23:41 UTC

Without the mg_virtual test your code would return NULL, and probably crash somewhere

Update:

git clone git@github.com:sisyphus/math-gmpz Math-GMPz
[download]

[reply]
[d/l]