Fix warning C4706

src/json.hpp

@@ -3034,12 +3034,20 @@ class parser
         {
             case token_type::begin_object:
             {
-                if (keep and (not callback or ((keep = callback(depth++, parse_event_t::object_start, result)))))
-                {
-                    // explicitly set result to object to cope with {}
-                    result.m_type = value_t::object;
-                    result.m_value = value_t::object;
-                }
+                if (keep)
+				{
+					if (callback)
+					{
+						keep = callback(depth++, parse_event_t::object_start, result);
+					}
+
+					if (not callback or keep)
+					{
+						// explicitly set result to object to cope with {}
+						result.m_type = value_t::object;
+						result.m_value = value_t::object;
+	                }
+				}
 
                 // read next token
                 get_token();
@@ -3130,11 +3138,19 @@ class parser
 
             case token_type::begin_array:
             {
-                if (keep and (not callback or ((keep = callback(depth++, parse_event_t::array_start, result)))))
+                if (keep)
                 {
-                    // explicitly set result to object to cope with []
-                    result.m_type = value_t::array;
-                    result.m_value = value_t::array;
+					if (callback)
+					{
+						keep = callback(depth++, parse_event_t::array_start, result);
+					}
+
+					if (not callback or keep)
+					{
+						// explicitly set result to object to cope with []
+						result.m_type = value_t::array;
+						result.m_value = value_t::array;
+					}
                 }
 
                 // read next token