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59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
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// Range v3 library
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//
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// Copyright Jeff Garland 2017
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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///[for_each_assoc]
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// for_each with associative containers
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// output
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// set: 1 2 3 4 5 6
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// map: one:1 three:3 two:2
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// unordered_map: three:3 one:1 two:2
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// unordered_set: 6 5 4 3 2 1
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#include <iostream>
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#include <map>
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#include <range/v3/algorithm/for_each.hpp>
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#include <set>
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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using std::cout;
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using std::string;
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auto print = [](int i) { cout << i << ' '; };
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// must take a pair for map types
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auto printm = [](std::pair<string, int> p) {
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cout << p.first << ":" << p.second << ' ';
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};
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int
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main()
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{
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cout << "set: ";
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std::set<int> si{1, 2, 3, 4, 5, 6};
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ranges::for_each(si, print);
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cout << "\nmap: ";
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std::map<string, int> msi{{"one", 1}, {"two", 2}, {"three", 3}};
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ranges::for_each(msi, printm);
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cout << "\nunordered map: ";
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std::unordered_map<string, int> umsi{{"one", 1}, {"two", 2}, {"three", 3}};
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ranges::for_each(umsi, printm);
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cout << "\nunordered set: ";
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std::unordered_set<int> usi{1, 2, 3, 4, 5, 6};
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ranges::for_each(usi, print);
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cout << '\n';
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}
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///[for_each_assoc]
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