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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/box.hpp>
#include <cassert>
#include <string>
int main()
{
{
// include:update/start
auto v1 = immer::box<std::string>{"hello"};
auto v2 = v1.update([&](auto l) { return l + ", world!"; });
assert((v1 == immer::box<std::string>{"hello"}));
assert((v2 == immer::box<std::string>{"hello, world!"}));
// include:update/end
}
}
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