Re: big integers forcing me to be a C programmer: "range iterator outside integer range"

... the C-style loop allows it only when I use bignum (but not Math::BigInt)

You can use the C-style loop with Math::BigInt, but you just have to create $x in a slightly different way - eg:

use warnings;
use strict;
use feature 'say';
use Math::BigInt;

my $x = Math::BigInt->new(1);
$x <<= 1024;

for(my $i = $x; $i <= $x + 2; $i++) {
  say $i;
  }
[download]

The C-style loop works with both bignum and Math::BigInt because it makes use of operators that are overloaded. Unfortunately, the '..' operator is not currently overloaded, and that's why the second loop fails.

Cheers,
Rob

Comment on Re: big integers forcing me to be a C programmer: "range iterator outside integer range" Download Code

Replies are listed 'Best First'.
Re^2: big integers forcing me to be a C programmer: "range iterator outside integer range" by ikegami (Patriarch) on May 07, 2009 at 11:20 UTC
but you just have to create $x in a slightly different way No you don't. The direct equivalent works just fine. `>perl -MMath::BigInt -le"my $x = Math::BigInt->new(2) Math::BigInt- +>new(1024); print $x" 1797693134862315907729305190789024733617976978942306572734300811577326 +758055009631327084773224075360211201138798713933576587897688144166224 +928474306394741243777678934248654852763022196012460941194530829520850 +057688381506823424628814739131105408272371633505106845862982399472459 +38479716304835356329624224137216` [download] It can even be simplified `>perl -MMath::BigInt -le"my $x = Math::BigInt->new(2) 1024; print $ +x" 1797693134862315907729305190789024733617976978942306572734300811577326 +758055009631327084773224075360211201138798713933576587897688144166224 +928474306394741243777678934248654852763022196012460941194530829520850 +057688381506823424628814739131105408272371633505106845862982399472459 +38479716304835356329624224137216` [download]	[reply] [d/l] [select]
Re^3: big integers forcing me to be a C programmer: "range iterator outside integer range" by syphilis (Archbishop) on May 07, 2009 at 11:30 UTC
The direct equivalent works just fine I was thinking that the "direct equivalent" would be: `my $x = Math::BigInt->new(2**1024);` [download] which doesn't work quite so well :-) Cheers, Rob	[reply] [d/l]
Re^4: big integers forcing me to be a C programmer: "range iterator outside integer range" by ikegami (Patriarch) on May 07, 2009 at 16:18 UTC
bignum converts every numeric literal into a Math::Big* object. That would even include the "2" in the for loop, although that one can also be skipped.	[reply]