| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| |
| // reference_wrapper |
| |
| // template <ObjectType T> reference_wrapper<T> ref(reference_wrapper<T>t); |
| |
| #include <functional> |
| #include <cassert> |
| |
| #include "counting_predicates.hpp" |
| |
| bool is5 ( int i ) { return i == 5; } |
| |
| template <typename T> |
| bool call_pred ( T pred ) { return pred(5); } |
| |
| int main() |
| { |
| { |
| int i = 0; |
| std::reference_wrapper<int> r1 = std::ref(i); |
| std::reference_wrapper<int> r2 = std::ref(r1); |
| assert(&r2.get() == &i); |
| } |
| { |
| unary_counting_predicate<bool(*)(int), int> cp(is5); |
| assert(!cp(6)); |
| assert(cp.count() == 1); |
| assert(call_pred(cp)); |
| assert(cp.count() == 1); |
| assert(call_pred(std::ref(cp))); |
| assert(cp.count() == 2); |
| } |
| } |