Re^6: Why is "any" slow in this case?

OK I always took the word "magic" as term for various "implementation quirks" in Perl and not as a well defined mechanism.

Variable::Magic suggests otherwise ...

... learning every day something new. :)

Cheers Rolf
_{(addicted to the Perl Programming Language :)

see Wikisyntax for the Monastery}

Comment on Re^6: Why is "any" slow in this case?

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Re^7: Why is "any" slow in this case? by ikegami (Patriarch) on Jul 29, 2025 at 11:35 UTC
Correct, I'm referring to the magic added by `sv_magic`. `$ perl -MDevel::Peek -e'Dump( $1 )' SV = PVMG(0x561e81adde40) at 0x561e81af86f0 REFCNT = 1 FLAGS = (GMG,SMG) # Has get magic, has set magic IV = 0 NV = 0 PV = 0 MAGIC = 0x561e81b067d0 # Magic's data, incl callbacks MG_VIRTUAL = &PL_vtbl_sv MG_TYPE = PERL_MAGIC_sv(\0) MG_OBJ = 0x561e81af86d8 MG_LEN = 1` [download] Magic is used by most punctuation vars (e.g. `$!`, `$$`, `%ENV`, `%SIG`), `tie`, lvalue operators (specifically `substr`, `vec`, `pos` and `$#a`), `f( $h{ x } )` (to prevent autovivification) and more.	[reply] [d/l] [select]

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Re^7: Why is "any" slow in this case?
by ikegami (Patriarch) on Jul 29, 2025 at 11:35 UTC

Correct, I'm referring to the magic added by sv_magic.

$ perl -MDevel::Peek -e'Dump( $1 )'
SV = PVMG(0x561e81adde40) at 0x561e81af86f0
  REFCNT = 1
  FLAGS = (GMG,SMG)                # Has get magic, has set magic
  IV = 0
  NV = 0
  PV = 0
  MAGIC = 0x561e81b067d0           # Magic's data, incl callbacks
    MG_VIRTUAL = &PL_vtbl_sv
    MG_TYPE = PERL_MAGIC_sv(\0)
    MG_OBJ = 0x561e81af86d8
    MG_LEN = 1
[download]

Magic is used by most punctuation vars (e.g. $!, $$, %ENV, %SIG), tie, lvalue operators (specifically substr, vec, pos and $#a), f( $h{ x } ) (to prevent autovivification) and more.

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