compiled all tests with contracts on/off on msvc, gcc, and clang

test/set/pre.cpp

@@ -0,0 +1,34 @@
+
+// Test only pre specified (for free func, but same for all contracts).
+
+#include "../aux_/oteststream.hpp"
+#include <boost/contract/function.hpp>
+#include <boost/contract/guard.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <sstream>
+
+boost::contract::aux::test::oteststream out;
+
+void f() {
+    boost::contract::guard c = boost::contract::function()
+        .precondition([] { out << "f::pre" << std::endl; })
+    ;
+    out << "f::body" << std::endl;
+}
+
+int main() {
+    std::ostringstream ok;
+
+    out.str("");
+    f();
+    ok.str(""); ok
+        #if BOOST_CONTRACT_PRECONDITIONS
+            << "f::pre" << std::endl
+        #endif
+        << "f::body" << std::endl
+    ;
+    BOOST_TEST(out.eq(ok.str()));
+
+    return boost::report_errors();
+}
+