23 lines
634 B
C++
23 lines
634 B
C++
//
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// immer: immutable data structures for C++
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// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
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//
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// This software is distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
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//
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#include <string>
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// include:intro/start
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#include <immer/map.hpp>
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int main()
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{
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const auto v0 = immer::map<std::string, int>{};
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const auto v1 = v0.set("hello", 42);
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assert(v0["hello"] == 0);
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assert(v1["hello"] == 42);
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const auto v2 = v1.erase("hello");
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assert(*v1.find("hello") == 42);
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assert(!v2.find("hello"));
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}
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// include:intro/end
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