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Re^2: Ref to a list not being equivalent to a list of refs to each element

by broquaint (Abbot)
on Jun 23, 2006 at 17:26 UTC ( [id://557269]=note: print w/replies, xml ) Need Help??


in reply to Re: Ref to a list not being equivalent to a list of refs to each element
in thread Ref to a list not being equivalent to a list of refs to each element

This occurs for the same reasons given above as 
\"foo";

[download]
creates a references to a constant value whereas 
\"foo$x";

[download]
is creating a reference to a temporary value.

If you want to see the evidence then just put Devel::Peek to work (take note of the FLAGS values for the reference): 

use Devel::Peek;

my $x = 'foo';

Dump \'foo';
Dump \"bar$x";

__output__
SV = RV(0x183c90c) at 0x225fe4         
  REFCNT = 1                           
  FLAGS = (PADBUSY,PADTMP,ROK,READONLY)
  RV = 0x225ffc                        
  SV = PV(0x22626c) at 0x225ffc        
    REFCNT = 1                         
    FLAGS = (POK,READONLY,pPOK)        
    PV = 0x1831d04 "foo"\0             
    CUR = 3                            
    LEN = 4                            
SV = RV(0x183c92c) at 0x2252ac         
  REFCNT = 1                           
  FLAGS = (TEMP,ROK)                   
  RV = 0x225150                        
  SV = PV(0x2261a0) at 0x225150        
    REFCNT = 1                         
    FLAGS = (POK,pPOK)                 
    PV = 0x1831cac "barfoo"\0          
    CUR = 6                            
    LEN = 7

[download]
HTH

_________
broquaint

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