1 files changed, 99 insertions, 0 deletions
diff --git a/src/boost/libs/contract/test/function/smoke.cpp b/src/boost/libs/contract/test/function/smoke.cpp
new file mode 100644
index 00000000..a4a733fd
--- /dev/null
+++ b/src/boost/libs/contract/test/function/smoke.cpp
@@ -0,0 +1,99 @@
+
+// Copyright (C) 2008-2018 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0 (see accompanying
+// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
+// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
+
+// Test free function contracts.
+
+#include "../detail/oteststream.hpp"
+#include "../detail/counter.hpp"
+#include <boost/contract/function.hpp>
+#include <boost/contract/old.hpp>
+#include <boost/contract/assert.hpp>
+#include <boost/contract/check.hpp>
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <sstream>
+
+boost::contract::test::detail::oteststream out;
+
+struct x_tag; typedef boost::contract::test::detail::counter<x_tag, int> x_type;
+struct y_tag; typedef boost::contract::test::detail::counter<y_tag, int> y_type;
+
+bool swap(x_type& x, y_type& y) {
+    bool result;
+    boost::contract::old_ptr<x_type> old_x =
+            BOOST_CONTRACT_OLDOF(x_type::eval(x));
+    boost::contract::old_ptr<y_type> old_y;
+    boost::contract::check c = boost::contract::function()
+        .precondition([&] {
+            out << "swap::pre" << std::endl;
+            BOOST_CONTRACT_ASSERT(x.value != y.value);
+        })
+        .old([&] {
+            out << "swap::old" << std::endl;
+            old_y = BOOST_CONTRACT_OLDOF(y_type::eval(y));
+        })
+        .postcondition([&] {
+            out << "swap::post" << std::endl;
+            BOOST_CONTRACT_ASSERT(x.value == old_y->value);
+            BOOST_CONTRACT_ASSERT(y.value == old_x->value);
+            BOOST_CONTRACT_ASSERT(result == (old_x->value != old_y->value));
+        })
+    ;
+
+    out << "swap::body" << std::endl;
+    if(x.value == y.value) return result = false;
+    int save_x = x.value;
+    x.value = y.value;
+    y.value = save_x;
+    return result = true;
+}
+
+int main() {
+    std::ostringstream ok;
+
+    {
+        x_type x; x.value = 123;
+        y_type y; y.value = 456;
+
+        out.str("");
+        bool r = swap(x, y);
+        ok.str(""); ok
+            #ifndef BOOST_CONTRACT_NO_PRECONDITIONS
+                << "swap::pre" << std::endl
+            #endif
+            #ifndef BOOST_CONTRACT_NO_OLDS
+                << "swap::old" << std::endl
+            #endif
+            << "swap::body" << std::endl
+            #ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
+                << "swap::post" << std::endl
+            #endif
+        ;
+        BOOST_TEST(out.eq(ok.str()));
+        
+        BOOST_TEST(r);
+        BOOST_TEST_EQ(x.value, 456);
+        BOOST_TEST_EQ(y.value, 123);
+    }
+
+    #ifndef BOOST_CONTRACT_NO_OLDS
+        #define BOOST_CONTRACT_TEST_old 1u
+    #else
+        #define BOOST_CONTRACT_TEST_old 0u
+    #endif
+
+    BOOST_TEST_EQ(x_type::copies(), BOOST_CONTRACT_TEST_old);
+    BOOST_TEST_EQ(x_type::evals(), BOOST_CONTRACT_TEST_old);
+    BOOST_TEST_EQ(x_type::ctors(), x_type::dtors()); // No leak.
+    
+    BOOST_TEST_EQ(y_type::copies(), BOOST_CONTRACT_TEST_old);
+    BOOST_TEST_EQ(y_type::evals(), BOOST_CONTRACT_TEST_old);
+    BOOST_TEST_EQ(y_type::ctors(), y_type::dtors()); // No leak.
+
+    #undef BOOST_CONTRACT_TEST_old
+    return boost::report_errors();
+}
+