I needed to be able to load both modules concurrently so I can run them on the same array

I tried the following experiment with Math-GMPz (a perl extension):
1) Place version 0.31 of GMPz.pm in ./temp31/Math;
2) Place its GMPz.dll in ./temp31/auto/Math/GMPz;
3) Place version 0.32 of GMPz.pm in ./temp32/Math;
4) Place its GMPz.dll in ./temp32/auto/Math/GMPz;

Then run the following script: 
use warnings;
use strict;

unshift @INC, "temp31";
require "temp31/Math/GMPz.pm";

print $Math::GMPz::VERSION, "\n";

unshift @INC, "temp32";
require "temp32/Math/GMPz.pm";

print $Math::GMPz::VERSION, "\n";

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which outputs (as desired): 
0.31
0.32

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and just goes to prove that one can easily (albeit a bit kludgily) load 2 different versions of the same perl extension into the same script.

You should be able to apply the same technique with Devel::Size.

Cheers,
Rob

UPDATE: However, I note it's not quite so simple if I try to load them in the reverse order (ie first load 0.32, then 0.31): 
0.32
Math::GMPz object version 0.32 does not match bootstrap parameter 0.31
+ at C:/_32/ap1007/lib/DynaLoader.pm line 224.
Compilation failed in require at try.pl line 10.

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Not sure why that happens - perhaps some %INC manipulation would counter it.
And, I guess, if you have to keep switching between the 2, then things get even messier.

In reply to Re^3: Module development: concurrent versions (Updated) by syphilis
in thread Module development: concurrent versions (Updated) by BrowserUk

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