in reply to Re^8: XS: SvPVLV examples?
in thread XS: SvPVLV examples?

It does! That means that having only one extension type is not as limiting as it seems!

Actually, there are two. There is also uvar magic: 

  U  PERL_MAGIC_uvar           vtbl_uvar       Available for use by ex
+tensions

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You can also chain multiple magics. See the description for SvPVMG in Perlguts:

moremagic is a pointer to another MAGIC and is used to form a single linked list of the MAGICs attached to an SV.

For my purposes, it is the lvalueness associated with PVLVs that is of most interest.

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Re^10: XS: SvPVLV examples?
by ikegami (Patriarch) on Sep 25, 2009 at 04:05 UTC

    For my purposes, it is the lvalueness associated with PVLVs that is of most interest.

    All of magics with a setter in their vtable have lvalueness. There's nothing special about PERL_MAGIC_substr, and the use of PVLV is not a requirement.

    Note that returning a PVLV or something magical doesn't make your function an lvalue function. That's a compile-time determination indicated by the :lvalue attribute.

    Are you really asking about making an lvalue function?

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