Maximum localtime value in Perl

kiramind has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Maximum localtime value in Perl by NetWallah (Canon) on May 08, 2018 at 03:49 UTC
The maximum ((update) signed) 32-bit int is 2,147,483,647 == (2^31)-1 . If you notice - this is the value of the "year" produced in #1. This value corresponds to 0x7FFFFFFF. IMHO, localtime should create an "integer Overflow" type exception beyond this value, or start using 64-bit ints. Memory fault -- brain fried	[reply]
Re: Maximum localtime value in Perl by mxb (Pilgrim) on May 08, 2018 at 08:31 UTC
I can replicate here also. `% perl --version This is perl 5, version 24, subversion 4 (v5.24.4) built for amd64-freebsd-thread-multi` [download] From perldoc perlport `gmtime In theory, "gmtime()" is reliable from -263 to 263-1. However, because work arounds in the implementation use floating point numbers, it will become inaccurate as the time gets larger. This is a bug and will be fixed in the future. On VOS, time values are 32-bit quantities.` [download]	[reply] [d/l] [select]
Re: Maximum localtime value in Perl by thomas895 (Deacon) on May 08, 2018 at 02:22 UTC
I can replicate this on v5.12.3 on Win32. What version are you using? I think it's not just Perl but the localtime function itself that causes this. -Thomas "Excuse me for butting in, but I'm interrupt-driven..."	[reply]
Re^2: Maximum localtime value in Perl by kiramind (Initiate) on May 09, 2018 at 02:56 UTC
I am using perl v5.18.2 on Mac OSX.	[reply]
Re: Maximum localtime value in Perl by choroba (Cardinal) on May 09, 2018 at 06:47 UTC
Based on Nostradamus' famous prediction, the world as we know it will end on that day. There's no point in returning localtime for any future moment. ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l]
Re^2: Maximum localtime value in Perl by shmem (Chancellor) on May 09, 2018 at 21:52 UTC
At that point in the future the planck length will shrink to zero, causing the whole universe to implode into a singular non-point of nothingness in no time. perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'	[reply]
Re^3: Maximum localtime value in Perl by Your Mother (Archbishop) on May 09, 2018 at 23:58 UTC
Don't be a tease!	[reply]
Re^2: Maximum localtime value in Perl by Anonymous Monk on May 09, 2018 at 21:16 UTC
Now that made me wonder if `localtime()` should handle complex numbers. And how.	[reply] [d/l]


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