void
cut(Host& h)
{
h.accept(MutateVisitor()
.onEnter([](Employee& e){
const double& sal = e.getSalary();
e.setSalary(sal ? sal / 2 : 0);
}));
}
double
total(const Host& h)
{
double total = 0;
h.accept(Visitor()
.onEnter([&](const Employee& e){
total += e.getSalary();
}));
return total;
}
double
median(const Host& h)
{
double total = 0;
unsigned int empls = 0;
h.accept(Visitor()
.onEnter([&](const Employee& e){
total += e.getSalary();
++empls;
}));
return empls ? total / empls : 0;
}
unsigned int
depth(const Host& h)
{
unsigned int max = 0, cur = 0;
h.accept(Visitor()
.onEnter([&](const Department&){
++cur;
})
.onExit ([&](const Department&){
if (cur > max) max = cur;
--cur;
}));
return max;
}
void
print(const Host& h, unsigned int i)
{
h.accept(Visitor()
.onEnter([&](const Company & c){
std::fill_n(std::ostream_iterator<char>(std::cout), i++, '\t');
std::cout << c.getName() << "\n";
})
.onEnter([&](const Department& d){
std::fill_n(std::ostream_iterator<char>(std::cout), i++, '\t');
std::cout << d.getName() << "\n";
})
.onEnter([&](const Employee & e){
std::fill_n(std::ostream_iterator<char>(std::cout), i, '\t');
std::cout << e.getName () << ", "
<< e.getAddress() << ", "
<< e.getSalary () << '\n';
})
.onExit ([&](const Company &){ --i; })
.onExit ([&](const Department&){ --i; }));
}
void v_visit(Host& host) const override
{
host.accept(*this);
}
