tested function overloads and protected bases

test/public_function/bases_protected_error.cpp

@@ -0,0 +1,43 @@
+
+// Test a public function contract cannot override from a protected one.
+
+#include <boost/contract/public_function.hpp>
+#include <boost/contract/base_types.hpp>
+#include <boost/contract/override.hpp>
+#include <boost/contract/guard.hpp>
+
+struct b {
+protected:
+    virtual void f(boost::contract::virtual_* v = 0) {
+        boost::contract::guard c = boost::contract::public_function(v, this);
+    }
+    
+    friend class boost::contract::access; // Test this cannot prevent error.
+};
+struct a
+    #define BASES public b
+    : BASES
+{
+    typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
+    #undef BASES
+
+    void f(boost::contract::virtual_* v = 0) /* override */ {
+        boost::contract::guard c = boost::contract::public_function<override_f>(
+                v, &a::f, this);
+    }
+
+    // GCC and CLang cannot correctly even see b::f as part of overloaded bases
+    // because it is protected. MSVC at least still fails compilation where
+    // override_f below tries to call b::f because it is protected so it cannot
+    // be seen from within override_f.
+    BOOST_CONTRACT_OVERRIDE(f)
+    
+    friend class boost::contract::access; // Test this cannot prevent error.
+};
+
+int main() {
+    a aa;
+    aa.f();
+    return 0;
+}
+