void apply1_wores_vec (Vec& a, UFunc f)
{
if(a.is_empty())
return;
typedef typename cnc_iterator<Vec>::type Iter;
for(Iter i = a.begin(), iend = a.end(); i != iend; ++i)
f(*i);
}
void apply2_wores_val_by_vec (Val& a, Vec& b, BinOp f)
{
if(b.is_empty())return;
typename cnc_iterator<Vec>::type
bi = b.begin(),
bend = b.end();
for(; bi != bend; ++bi)
f(a, *bi);
}
void apply2_wores_vec_by_val (Vec& a, Val& b, BinOp f)
{
if(a.is_empty())return;
typename cnc_iterator<Vec>::type
ai = a.begin(),
aend = a.end();
for(; ai != aend; ++ai)
f(*ai, b);
}