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- // Copyright (C) 2009-2012 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0
- // (see accompanying file LICENSE_1_0.txt or a copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // Home at http://www.boost.org/libs/local_function
- #include <boost/config.hpp>
- #ifdef BOOST_NO_CXX11_VARIADIC_MACROS
- # error "variadic macros required"
- #else
- #include <boost/local_function.hpp>
- #include <boost/functional/overloaded_function.hpp> // For overloading.
- #include <boost/typeof/std/string.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <string>
- //[overload_decl
- int add_i(int x, int y) { return x + y; }
- //]
- int main(void) {
- //[overload
- std::string s = "abc";
- std::string BOOST_LOCAL_FUNCTION(
- const bind& s, const std::string& x) {
- return s + x;
- } BOOST_LOCAL_FUNCTION_NAME(add_s)
- double d = 1.23;
- double BOOST_LOCAL_FUNCTION(const bind d, double x, double y, default 0) {
- return d + x + y;
- } BOOST_LOCAL_FUNCTION_NAME(add_d)
-
- boost::overloaded_function<
- std::string (const std::string&)
- , double (double)
- , double (double, double) // Overload giving default param.
- , int (int, int)
- > add(add_s, add_d, add_d, add_i); // Overloaded function object.
- BOOST_TEST(add("xyz") == "abcxyz"); // Call `add_s`.
- BOOST_TEST((4.44 - add(3.21)) <= 0.001); // Call `add_d` (no default).
- BOOST_TEST((44.44 - add(3.21, 40.0)) <= 0.001); // Call `add_d`.
- BOOST_TEST(add(1, 2) == 3); // Call `add_i`.
- //]
- return boost::report_errors();
- }
- #endif // VARIADIC_MACROS
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