[iter] Add hb_apply()
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@ -370,6 +370,36 @@ static const struct
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{ return hb_zip_iter_t<hb_iter_t (A), hb_iter_t (B)> (a.iter (), b.iter ()); }
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} hb_zip HB_UNUSED;
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/* hb_apply() */
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template <typename Appl>
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struct hb_apply_t
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{
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hb_apply_t (Appl&& a) : a (a) {}
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template <typename Iter,
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hb_enable_if (hb_is_iterator (Iter))>
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void
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operator () (Iter it) const
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{
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for (; it; ++it)
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a (*it);
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}
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private:
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Appl a;
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};
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static const struct
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{
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template <typename Appl> hb_apply_t<Appl>
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operator () (Appl&& a) const
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{ return hb_apply_t<Appl> (a); }
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template <typename Appl> hb_apply_t<Appl&>
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operator () (Appl *a) const
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{ return hb_apply_t<Appl&> (*a); }
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} hb_apply HB_UNUSED;
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/* hb_sink() */
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template <typename Sink>
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@ -148,6 +148,9 @@ main (int argc, char **argv)
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| hb_sink (st)
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;
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+ hb_iter (src)
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| hb_apply (&st);
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t << 1;
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long vl;
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s >> vl;
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