1
2// Copyright (C) 2009-2012 Lorenzo Caminiti
3// Distributed under the Boost Software License, Version 1.0
4// (see accompanying file LICENSE_1_0.txt or a copy at
5// http://www.boost.org/LICENSE_1_0.txt)
6// Home at http://www.boost.org/libs/local_function
7
8#include <boost/config.hpp>
9#ifdef BOOST_NO_CXX11_VARIADIC_MACROS
10# error "variadic macros required"
11#else
12
13#include <boost/local_function.hpp>
14#include <boost/function.hpp>
15#include <boost/detail/lightweight_test.hpp>
16#include <iostream>
17
18//[return_assign
19void call1(boost::function<int (int) > f) { BOOST_TEST(f(1) == 5); }
20void call0(boost::function<int (void)> f) { BOOST_TEST(f() == 5); }
21
22boost::function<int (int, int)> linear(const int& slope) {
23 int BOOST_LOCAL_FUNCTION(const bind& slope,
24 int x, default 1, int y, default 2) {
25 return x + slope * y;
26 } BOOST_LOCAL_FUNCTION_NAME(lin)
27
28 boost::function<int (int, int)> f = lin; // Assign to local variable.
29 BOOST_TEST(f(1, 2) == 5);
30
31 call1(f: lin); // Pass to other functions.
32 call0(f: lin);
33
34 return lin; // Return.
35}
36
37void call(void) {
38 boost::function<int (int, int)> f = linear(slope: 2);
39 BOOST_TEST(f(1, 2) == 5);
40}
41//]
42
43int main(void) {
44 call();
45 return boost::report_errors();
46}
47
48#endif // VARIADIC_MACROS
49
50

source code of boost/libs/local_function/test/return_assign.cpp