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[iter] Start prototyping hb_copy()

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This commit is contained in:
Behdad Esfahbod 2018-12-21 02:12:55 -05:00
parent 44af738d19
commit ad3ed58de5
1 changed files with 14 additions and 4 deletions
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18
src/test-iter.cc
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@ -33,6 +33,7 @@ struct array_iter_t : hb_iter_t<array_iter_t<T>, T>
{
array_iter_t (hb_array_t<T> arr_) : arr (arr_) {}
typedef T __item_type__;
T& __item_at__ (unsigned i) const { return arr[i]; }
bool __more__ () const { return arr.len; }
void __forward__ (unsigned n) { arr += n; }
@ -43,6 +44,18 @@ struct array_iter_t : hb_iter_t<array_iter_t<T>, T>
hb_array_t<T> arr;
};
template <typename S, typename D> static inline bool
copy (D &d, hb_iter_t<S> &s)
{
typename S::iter_t is = s.iter ();
typename D::iter_t id = d.iter ();
for (; d && s; ++d, ++s)
*d = *s;
return !d;
}
int
main (int argc, char **argv)
{
@ -56,10 +69,7 @@ main (int argc, char **argv)
s2 = s;
for (; s && t; ++s, ++t)
{
*t = *s;
}
copy (t, s);
return 0;
}