Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical

Re^4: XS: returning a 64-bit unsigned int?

by ikegami (Pope)
on Sep 27, 2011 at 07:21 UTC ( #928031=note: print w/ replies, xml ) Need Help??

in reply to Re^3: XS: returning a 64-bit unsigned int?
in thread XS: returning a 64-bit unsigned int?

Perl claims the right to convert among equivalent representations. It's an optimisation that an UV isn't used unless needed since UVs require extra handling.

>perl -MDevel::Peek -e"Dump(0x7FFFFFFF)" SV = IV(0x1de9d00) at 0x1de9d04 REFCNT = 1 FLAGS = (PADTMP,IOK,READONLY,pIOK) IV = 2147483647 >perl -MDevel::Peek -e"Dump(0x80000000)" SV = IV(0x4a9d00) at 0x4a9d04 REFCNT = 1 FLAGS = (PADTMP,IOK,READONLY,pIOK,IsUV) UV = 2147483648

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://928031]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (12)
As of 2016-06-29 19:42 GMT
Find Nodes?
    Voting Booth?
    My preferred method of making French fries (chips) is in a ...

    Results (386 votes). Check out past polls.