mirror of
https://github.com/boostorg/lambda.git
synced 2026-01-21 04:52:25 +00:00
83 lines
1.6 KiB
C++
83 lines
1.6 KiB
C++
#include "boost/lambda/lambda.hpp"
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#include <iostream>
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#include <string>
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#include <vector>
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#include <algorithm>
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#include <iterator>
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#include <functional>
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void begin_section(std::string name) {
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std::cout << "-------------------------------------------------------\n";
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std::cout << name << '\n';
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std::cout << "-------------------------------------------------------\n";
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return;
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};
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void end_section() {
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std::cout << "-------------------------------------------------------\n";
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return;
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};
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template<class Test>
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void call_test(Test t, std::string name)
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{
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begin_section(name);
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t();
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end_section();
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};
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void introduction() {
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using boost::lambda::_1;
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std::cout << "Output should be: 1 2\n";
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std::vector<int> a; a.push_back(1); a.push_back(2);
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for_each(a.begin(), a.end(), std::cout << _1 << ' ');
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std::cout << '\n';
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return;
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}
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void motivation() {
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using std::vector;
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using std::ostream_iterator;
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using std::cout;
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using std::bind1st;
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using std::plus;
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using std::transform;
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using std::for_each;
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vector<int> a; a.push_back(1); a.push_back(2);
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std::cout << "Output should be: 23 = 23 = 23\n";
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transform(a.begin(), a.end(), ostream_iterator<int>(cout),
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bind1st(plus<int>(), 1));
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using boost::lambda::_1;
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cout << " = ";
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transform(a.begin(), a.end(), ostream_iterator<int>(cout), 1 + _1);
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cout << " = ";
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for_each(a.begin(), a.end(), cout << (_1 + 1));
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std::cout << '\n';
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return;
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}
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int main() {
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using std::cout;
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call_test(introduction, "introduction"); cout << '\n';
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call_test(motivation, "Motivation"); cout << '\n';
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return 0;
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}
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