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#pragma once
template <typename T>
class BidirectionalIterWrapper {
public:
using difference_type = typename T::difference_type;
using value_type = typename T::value_type;
using pointer = typename T::pointer;
using reference = typename T::reference;
using iterator_category = std::bidirectional_iterator_tag;
BidirectionalIterWrapper() : iter()
{}
BidirectionalIterWrapper(T iter_) : iter(iter_)
{}
bool operator==(const BidirectionalIterWrapper& i) const
{
return iter == i.iter;
}
bool operator!=(const BidirectionalIterWrapper& i) const
{
return !(*this == i);
}
BidirectionalIterWrapper operator++(int)
{
BidirectionalIterWrapper cur(iter);
++iter;
return cur;
}
BidirectionalIterWrapper operator--(int)
{
BidirectionalIterWrapper cur(iter);
--iter;
return cur;
}
BidirectionalIterWrapper& operator++()
{
++iter;
return *this;
}
BidirectionalIterWrapper& operator--()
{
--iter;
return *this;
}
const value_type& operator*() const
{
return *iter;
}
private:
T iter;
};
template <typename Iter>
constexpr auto make_bidir(Iter iter) -> BidirectionalIterWrapper<Iter>
{
return BidirectionalIterWrapper<Iter>(iter);
}
template <typename T, typename = rapidfuzz::rf_enable_if_t<std::is_same<T, char>::value>>
std::basic_string<T> str_multiply(std::basic_string<T> a, size_t b)
{
std::basic_string<T> output;
while (b--)
output += a;
return output;
}
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