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