Update README.md

README.md

@@ -3,10 +3,13 @@
 The main goal of this project is to provide a code generator for serializing/deserializing C++ objects to/from JSON
 using Clang and RapidJSON.
 
-It is also possible to serialize/deserialize C++ objects to a platform independent binary format.
+Extending the generator to generate code for other formats or other applications of reflection is possible as well.
+A serializer/deserializer for a platform independent binary format has already been implemented.
 
-Extending the generator to generate code for other applications of reflection or to provide generic
-reflection would be possible as well.
+It would also be possible to extend the library/generator to provide generic reflection (not implemented yet).
+
+The following documentation focuses on the JSON (de)serializer. However, most of it is also true for the mentioned
+binary (de)serializer which works quite similar.
 
 ## Open for other reflection approaches
 The reflection implementation used behind the scenes of this library is exchangeable:
@@ -69,12 +72,18 @@ The following table shows the mapping of supported C++ types to supported JSON t
 * Enums are (de)serialized as their underlying integer value. When deserializing, it is currently *not* checked
   whether the present integer value is a valid enumeration item.
 * The JSON type for smart pointer depends on the type the pointer refers to. It can also be `null`.
+* If multiple `std::shared_ptr` instance might point to the same object this object is serialized multiple times.
+  When deserializing those identical objects, it is currently not possible to share the memory (again). So each
+  `std::shared_ptr` will point to its own copy. Note that this limitation is *not* true when using binary
+  serialization.
 * For deserialization
     * iteratables must provide an `emplace_back` method. So deserialization of eg. `std::forward_list`
       is currently not supported.
     * custom types must provide a default constructor.
     * constant member variables are skipped.
 * For custom (de)serialization, see the section below.
+* The binary (de)serializer supports approximately the same C++ types but obviously maps them to a platform
+  independent binary representation rather than a JSON type.
 
 ## Usage
 This example shows how the library can be used to make a `struct` serializable:
@@ -116,6 +125,11 @@ reflective_rapidjson_generator \
     --output-file "$builddir/reflection/code-defining-structs.h"
 </pre>
 
+There are further arguments available, see:
+<pre>
+reflective_rapidjson_generator --help
+</pre>
+
 #### Binary (de)serialization
 It works very similar to the example above. Just use the `BinarySerializable` class instead (or in addition):
 
@@ -356,16 +370,18 @@ Reflective RapidJSON.
   provided (so far).
 * I usually develop using the latest version of those dependencies. So it is recommend to get the
   the latest versions as well. I tested the following versions so far:
-    * GCC 7.2.1/7.3.0 or Clang 5.0 as compiler
-    * libstdc++ from GCC 7.2.1
+    * GCC 7.2.1/7.3.0/8.1.0 or Clang 5.0/6.0/7.0 as compiler
+    * libstdc++ from GCC 7.2.1/7.3.0/8.1.0
     * CMake 3.10.1
     * Clang 5.0.0/5.0.1 for LibTooling
     * RapidJSON 1.1.0
     * C++ utilities 4.12
-    * Boost.Hana 1.65.1 and 1.66.0
+    * Boost.Hana 1.65.1, 1.66.0, 1.67.0, 1.68.0
     * CppUnit 1.14.0
     * Doxygen 1.8.13
     * Graphviz 2.40.1
+* The binary (de)serializer requires C++ utilities at runtime. So when using it, it is required to
+  link against C++ utilities.
 
 ### How to build
 #### 1. Install dependencies