1 // (C) Copyright Jeremy Siek 2000.
2 // Distributed under the Boost Software License, Version 1.0. (See
3 // accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5 
6 #include <boost/concept_check.hpp>
7 
8 /*
9 
10   This file verifies that the BOOST_CLASS_REQUIRE macro of the Boost
11   Concept Checking Library does not cause errors when it is not suppose
12   to.
13 
14 */
15 
operator ()foo16 struct foo { bool operator()(int) { return true; } };
operator ()bar17 struct bar { bool operator()(int, char) { return true; } };
18 
19 class class_requires_test
20 {
21     BOOST_CONCEPT_ASSERT((boost::EqualityComparable<int>));
22     typedef int* int_ptr; typedef const int* const_int_ptr;
23     BOOST_CONCEPT_ASSERT((boost::EqualOp<int_ptr,const_int_ptr>));
24     BOOST_CONCEPT_ASSERT((boost::UnaryFunction<foo,bool,int>));
25     BOOST_CONCEPT_ASSERT((boost::BinaryFunction<bar,bool,int,char>));
26 };
27 
28 int
main()29 main()
30 {
31     class_requires_test x;
32     boost::ignore_unused_variable_warning(x);
33     return 0;
34 }
35