tvl-depot/third_party/immer/example/vector/iota-transient-std.cpp

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//
// immer: immutable data structures for C++
// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
//
// This software is distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
//
#include <immer/vector.hpp>
#include <immer/vector_transient.hpp>
#include <algorithm>
#include <iostream>
// include:myiota/start
immer::vector<int> myiota(immer::vector<int> v, int first, int last)
{
auto t = v.transient();
std::generate_n(
std::back_inserter(t), last - first, [&] { return first++; });
return t.persistent();
}
// include:myiota/end
int main()
{
auto v = myiota({}, 0, 100);
std::copy(v.begin(), v.end(), std::ostream_iterator<int>{std::cout, "\n"});
}