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[ceph.git] / ceph / src / boost / libs / safe_numerics / test / test_checked_less_than.cpp

diff --git a/ceph/src/boost/libs/safe_numerics/test/test_checked_less_than.cpp b/ceph/src/boost/libs/safe_numerics/test/test_checked_less_than.cpp
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+++ b/ceph/src/boost/libs/safe_numerics/test/test_checked_less_than.cpp
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+//  Copyright (c) 2012 Robert Ramey
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <iostream>
+#include <boost/logic/tribool_io.hpp>
+
+#include <boost/core/demangle.hpp>
+#include <boost/safe_numerics/checked_result_operations.hpp>
+#include <boost/safe_numerics/checked_integer.hpp>
+
+// works for both GCC and clang
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-value"
+
+// note: T should be of type checked_result<R> for some integer type R
+template<class T>
+bool test_checked_less_than(
+    T v1,
+    T v2,
+    char expected_result
+){
+    using namespace boost::safe_numerics;
+    const boost::logic::tribool result = v1 < v2;
+    std::cout
+        << std::boolalpha << v1 << " < " << v2 << " -> " << result
+        << std::endl;
+
+    switch(expected_result){
+    case '<':
+        if(result)
+            return true;
+        break;
+    case '>':
+    case '=':
+        if(!result)
+            return true;
+        break;
+    case '!':
+        if(indeterminate(result))
+            return true;
+        break;
+    }
+    std::cout
+        << "failed to detect error in addition "
+        << std::hex << result << "(" << std::dec << result << ")"
+        << " != "<< v1 << " < " << v2
+        << std::endl;
+    v1 < v2;
+    return false;
+}
+
+#pragma GCC diagnostic pop
+
+#include "test_checked_comparison.hpp"
+
+template<typename T, typename First, typename Second>
+struct test_signed_pair {
+    bool operator()() const {
+        std::size_t i = First();
+        std::size_t j = Second();
+        std::cout << std::dec << i << ',' << j << ','
+        << "testing " << boost::core::demangle(typeid(T).name()) << ' ';
+        return test_checked_less_than(
+            signed_values<T>[i],
+            signed_values<T>[j],
+            signed_comparison_results[i][j]
+        );
+    };
+};
+
+template<typename T, typename First, typename Second>
+struct test_unsigned_pair {
+    bool operator()() const {
+        std::size_t i = First();
+        std::size_t j = Second();
+        std::cout << std::dec << i << ',' << j << ','
+        << "testing " << boost::core::demangle(typeid(T).name()) << ' ';
+        return test_checked_less_than(
+            unsigned_values<T>[i],
+            unsigned_values<T>[j],
+            unsigned_comparison_results[i][j]
+        );
+    };
+};
+
+#include <boost/mp11/algorithm.hpp>
+
+int main(){
+    using namespace boost::mp11;
+    bool rval = true;
+
+    mp_for_each<
+        mp_product<
+            test_signed_pair,
+            signed_test_types,
+            signed_value_indices,
+            signed_value_indices
+        >
+    >([&](auto I){
+        rval &= I();
+    });
+
+    mp_for_each<
+        mp_product<
+            test_unsigned_pair,
+            unsigned_test_types,
+            unsigned_value_indices, unsigned_value_indices
+        >
+    >([&](auto I){
+        rval &= I();
+    });
+
+    std::cout << (rval ? "success!" : "failure") << std::endl;
+    return rval ? 0 : 1;
+}