Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

(tye)Re: How to make bi-modal variables like $! ?

by tye (Cardinal)
on Jun 28, 2001 at 20:33 UTC ( #92359=note: print w/ replies, xml ) Need Help??


in reply to How to make bi-modal variables like $! ?

See SetDualVar, which includes XS code (C code) that sets the string/number value of a scalar without invalidating the other.

        - tye (but my friends call me "Tye")


Comment on (tye)Re: How to make bi-modal variables like $! ?
Re: (tye)Re: How to make bi-modal variables like $! ?
by bikeNomad (Priest) on Jun 28, 2001 at 20:45 UTC
    Cool! Re-writing the guts of SetDualVar using Inline, it looks like:

    #!/usr/bin/perl -w # Solution by Kenneth Albanowski <kjahds@kjahds.com> # from the module SetDualVar-1.0.tar.gz # re-written using Inline. use strict; use Inline 'C'; my $v; set_both($v, "I'm a string too!", 123); print $v+0, " $v\n"; __END__ __C__ void set_both(SV* variable, SV* string, SV* numeric) { SvPV(string, PL_na); if(!SvPOKp(string) || (!SvNOKp(numeric) && !SvIOKp(numeric)) ) { croak("Usage: set_both variable,string,numeric"); } sv_setsv(variable,string); if(SvNOKp(numeric)) { sv_setnv(variable,SvNV(numeric)); } else { sv_setiv(variable,SvIV(numeric)); } SvPOK_on(variable); }

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://92359]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (7)
As of 2015-07-01 23:18 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (24 votes), past polls