[HarfBuzz] static const functions in hb-iter.hh

[an0oo0nym0oo0us OoO]

Yeah,

After a careful look, I thought they were functions in which their
definitions are implemented in operator () overloading.


On Mon, Oct 25, 2021 at 7:26 PM an0oo0nym0oo0us OoO <
oooanoonymoous at gmail.com> wrote:

> Hello everyone,
>
> I'm new to Harfbuzz (and C++ too). I'm reading Harfbuzz source code but
> cannot understand what many functions HB_FUNCOBJ in hb-iter.hh do.
>
> hb_all, hb_none, hb_second, hb_min, hb_max, hb_clamp, ... are all without
> any definition, just are __attribute__ (unused).
>
> So what do these functions do? And what are their roles?
>
> Thanks,
> P. Toan
>
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