I probably ought at least find out exactly what that change of behaviour is

Here's the script that demonstrates that change of behaviour: 
use warnings;
use locale;

$m = "3.14e+9" + 0;
$n = "3,14e+9" + 0;

print "\$m is $m\n";
print "\$n is $n\n";

[download]
On current bleadperl (and recent "double" and "long double" perls) it outputs: 
$m is 3140000000
$n is 3140000000

[download]
But when I patch bleadperl to assign with Perl_strtod (or run that script on a quadmath build of perl) it outputs: 
$m is 3140000000
$n is 3

[download]
AFAICT, it pertains solely to the numification of strings. When values are assigned as barewords, there's no difference between the behaviour of the various builds.
And I think it comes into play only if the locale radix character is a comma.
My next step is to find out whether this needs to be fixed before my proposed patches can be applied.

Cheers,
Rob

In reply to Re^8: Avoiding perl's Atof when assigning floating point values by syphilis
in thread Avoiding perl's Atof when assigning floating point values by syphilis

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