graphs/cpp/exist_functor/exist.hxx


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#pragma once
#include <algorithm>

#include "exist.hh"

template <class T>
bool Exist<T>::operator()(T x)
{
    if (std::find(seen_.begin(), seen_.end(), x) == seen_.end())
    {
        seen_.push_back(x);
        return false;
    }
    return true;
}