Fix warnings and errors on VisualStudio 2013

Interestingly, VS2013 with Boost 1.55 exhibited the issues complained
about in issue #92, so I was able to provide an appropriate fix. It would
appear to be bugs in both compilers, which seems very odd.

include/chaiscript/dispatchkit/bootstrap.hpp

@@ -279,7 +279,11 @@ namespace chaiscript
         boost::shared_ptr<const dispatch::Dynamic_Proxy_Function> pf = boost::dynamic_pointer_cast<const dispatch::Dynamic_Proxy_Function>(t_pf);
         if (pf)
         {
-          return pf->get_guard();
+          if (pf->get_guard()) {
+            return true;
+          } else {
+            return false;
+          }
         } else {
           return false;
         }

include/chaiscript/dispatchkit/proxy_functions_detail.hpp

@@ -86,13 +86,20 @@ namespace chaiscript
        * if any unboxing fails the execution of the function fails and
        * the bad_boxed_cast is passed up to the caller.
        */
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable : 4100)
+#endif
+
 #ifdef __llvm__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-parameter"
 #endif
+
       template<typename Ret BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, typename Param)>
         Ret call_func(const boost::function<Ret (BOOST_PP_ENUM_PARAMS(n, Param))> &f,
             const std::vector<Boxed_Value> &params, const Dynamic_Cast_Conversions & BOOST_PP_IF(n, t_conversions, BOOST_PP_EMPTY))
+
 #ifdef __llvm__
 #pragma clang diagnostic pop
 #endif
@@ -105,19 +112,31 @@ namespace chaiscript
           }
         }
 
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
       /**
        * Used by Proxy_Function_Impl to determine if it is equivalent to another
        * Proxy_Function_Impl object. This function is primarly used to prevent
        * registration of two functions with the exact same signatures
        */
 
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable : 4100)
+#endif
+
 #ifdef __llvm__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-parameter"
 #endif
+
        template<typename Ret BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, typename Param)>
         bool compare_types_cast(Ret (*)(BOOST_PP_ENUM_PARAMS(n, Param)),
             const std::vector<Boxed_Value> & BOOST_PP_IF(n, params, BOOST_PP_EMPTY), const Dynamic_Cast_Conversions &t_conversions)
+
+
 #ifdef __llvm__
 #pragma clang diagnostic pop
 #endif
@@ -131,6 +150,11 @@ namespace chaiscript
 
           return true;
         }
+
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
     }
   }
 }

src/main.cpp

@@ -46,7 +46,7 @@ void *cast_module_symbol(std::string (*t_path)())
 
 std::string default_search_path()
 {
-#ifdef CHAISCRIPT_WINDOWS  // force no unicode
+#ifdef BOOST_WINDOWS  // force no unicode
   CHAR path[4096];
   int size = GetModuleFileNameA(0, path, sizeof(path)-1);
 
@@ -60,8 +60,8 @@ std::string default_search_path()
     return "";
   }
 
-
 #else
+
   std::string exepath;
 
   std::vector<char> buf(2048);

src/reflection.cpp

@@ -24,7 +24,12 @@ bool has_parse_tree(const chaiscript::Const_Proxy_Function &t_pf)
     = boost::dynamic_pointer_cast<const chaiscript::dispatch::Dynamic_Proxy_Function>(t_pf);
   if (pf)
   {
-    return pf->get_parse_tree();
+    if (pf->get_parse_tree())
+    {
+      return true;
+    } else {
+      return false;
+    }
   } else {
     return false;
   }

src/test_module.cpp

@@ -15,6 +15,9 @@ class TestBaseType
 
     int val;
     const int const_val;
+
+  private:
+    TestBaseType &operator=(const TestBaseType &);
 };
 
 enum TestEnum
@@ -32,6 +35,9 @@ class TestDerivedType : public TestBaseType
   public:
     virtual ~TestDerivedType() {}
     virtual int func() { return 1; }
+
+  private:
+    TestDerivedType &operator=(const TestDerivedType &);
 };
 
 std::string hello_world()