forked from boostorg/function
index.html:
- Removed reference and tutorial: now just link to them faq.html: - Moved to doc/faq.html doc/faq.html: - Relative directory fixups doc/reference.html: - Reference manual for Boost.Function doc/tutorial.html: - Tutorial for Boost.Function (the old "Usage" sections) - Additional example showing the use of references and arrays example/bind1st.cpp: example/int_div.cpp: example/sum_avg.cpp: - Examples from tutorial [SVN r10620]
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example/bind1st.cpp
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example/bind1st.cpp
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// Boost.Function library examples
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// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
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//
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// Permission to copy, use, sell and distribute this software is granted
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// provided this copyright notice appears in all copies.
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// Permission to modify the code and to distribute modified code is granted
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// provided this copyright notice appears in all copies, and a notice
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// that the code was modified is included with the copyright notice.
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//
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// This software is provided "as is" without express or implied warranty,
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// and with no claim as to its suitability for any purpose.
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// For more information, see http://www.boost.org
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#include <iostream>
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#include <boost/function.hpp>
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#include <functional>
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struct X {
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X(int val) : value(val) {}
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int foo(int x) { return x * value; }
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int value;
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};
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int
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main()
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{
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boost::function<int, int> f;
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X x(7);
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f = std::bind1st(std::mem_fun(&X::foo), &x);
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std::cout << f(5) << std::endl; // Call x.foo(5)
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return 0;
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}
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example/int_div.cpp
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example/int_div.cpp
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// Boost.Function library examples
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// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
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//
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// Permission to copy, use, sell and distribute this software is granted
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// provided this copyright notice appears in all copies.
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// Permission to modify the code and to distribute modified code is granted
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// provided this copyright notice appears in all copies, and a notice
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// that the code was modified is included with the copyright notice.
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//
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// This software is provided "as is" without express or implied warranty,
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// and with no claim as to its suitability for any purpose.
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// For more information, see http://www.boost.org
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#include <iostream>
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#include <boost/function.hpp>
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struct int_div {
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float operator()(int x, int y) const { return ((float)x)/y; };
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};
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int
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main()
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{
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boost::function<float, int, int> f;
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f = int_div();
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std::cout << f(5, 3) << std::endl; // 1.66667
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return 0;
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}
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example/sum_avg.cpp
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example/sum_avg.cpp
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// Boost.Function library examples
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// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
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//
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// Permission to copy, use, sell and distribute this software is granted
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// provided this copyright notice appears in all copies.
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// Permission to modify the code and to distribute modified code is granted
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// provided this copyright notice appears in all copies, and a notice
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// that the code was modified is included with the copyright notice.
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//
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// This software is provided "as is" without express or implied warranty,
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// and with no claim as to its suitability for any purpose.
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// For more information, see http://www.boost.org
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#include <iostream>
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#include <boost/function.hpp>
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void do_sum_avg(int values[], int n, int& sum, float& avg)
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{
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sum = 0;
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for (int i = 0; i < n; i++)
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sum += values[i];
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avg = (float)sum / n;
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}
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int
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main()
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{
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boost::function<void, int[], int, int&, float&> sum_avg;
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sum_avg = &do_sum_avg;
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int values[5] = { 1, 1, 2, 3, 5 };
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int sum;
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float avg;
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sum_avg(values, 5, sum, avg);
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std::cout << "sum = " << sum << std::endl;
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std::cout << "avg = " << avg << std::endl;
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return 0;
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}
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