Ah. On reading the perl source I think I should have written this thusly. This leaves off the upgrade and grow (that's apparently handled within NEWSV when len > 0) and since NEWSV uses New() instead of Newz(), I had to follow up with an explicit Zero() on the PV. So... is *this* right? I added a SvPOK_only() call as well because without that the only flag on it was TEMP. If I do my $foo = foo(); Dump($foo) the REFCNT is one - is that right and am I supposed to mortalize the scalar I'm returning here?

SV* foo(int nr) {
    SV* out = NEWSV(535,nr);
    SvPOK_only(out);
    Zero(SvPVX(out), nr, char);
    SvCUR_set(out,nr);
    return (out);
}

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In reply to Re: NEWSV'd scalar isn't initially empty? by diotalevi
in thread NEWSV'd scalar isn't initially empty? by diotalevi

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