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

by tye (Sage)
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 $! ?

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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 <> # 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); }

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