1 // Copyright (c) 2012 Robert Ramey
2 //
3 // Distributed under the Boost Software License, Version 1.0. (See
4 // accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6
7 #include <boost/safe_numerics/checked_result.hpp>
8 #include <boost/safe_numerics/checked_result_operations.hpp>
9 #include <boost/safe_numerics/checked_integer.hpp>
10
11 // note: T should be of tyme checked_result<R> for some integer type R
12 template<class T>
test_checked_or(T v1,T v2,char expected_result)13 constexpr bool test_checked_or(
14 T v1,
15 T v2,
16 char expected_result
17 ){
18 using namespace boost::safe_numerics;
19 const T result = v1 | v2;
20 switch(expected_result){
21 case '.':
22 if(result.exception()){
23 return false;
24 }
25 return true;
26 case '-':
27 if(safe_numerics_error::negative_overflow_error == result.m_e)
28 return true;
29 case '+':
30 if(safe_numerics_error::positive_overflow_error == result.m_e)
31 return true;
32 case '!':
33 if(safe_numerics_error::range_error == result.m_e)
34 return true;
35 }
36 return false;
37 }
38
39 #include "test_checked_or.hpp"
40
41 template<typename T, typename First, typename Second>
42 struct test_signed_pair {
43 static const std::size_t i = First();
44 static const std::size_t j = Second();
45 // note: is constexpr really required here? compilers disagree!
46 constexpr static const bool value = test_checked_or(
47 signed_values<T>[i],
48 signed_values<T>[j],
49 signed_or_results[i][j]
50 );
51 };
52
53 template<typename T, typename First, typename Second>
54 struct test_unsigned_pair {
55 static const std::size_t i = First();
56 static const std::size_t j = Second();
57 // note: is constexpr really required here? compilers disagree!
58 constexpr static const bool value = test_checked_or(
59 unsigned_values<T>[i],
60 unsigned_values<T>[j],
61 unsigned_or_results[i][j]
62 );
63 };
64
65 #include "check_symmetry.hpp"
66 #include <boost/mp11/algorithm.hpp>
67
main()68 int main(){
69 using namespace boost::mp11;
70 // sanity check on test matrix - should be symetrical
71 check_symmetry(signed_or_results);
72 check_symmetry(unsigned_or_results);
73
74 static_assert(
75 mp_all_of<
76 mp_product<
77 test_signed_pair,
78 signed_test_types,
79 signed_value_indices, signed_value_indices
80 >,
81 mp_to_bool
82 >(),
83 "all values for all signed types correctly or'ed"
84 );
85
86 static_assert(
87 mp_all_of<
88 mp_product<
89 test_unsigned_pair,
90 unsigned_test_types,
91 unsigned_value_indices, unsigned_value_indices
92 >,
93 mp_to_bool
94 >(),
95 "all values for all unsigned types correctly or'ed"
96 );
97 return 0;
98 }
99