added operator<< overloads for dynamic::Value

src/data/dynamic.cpp

@@ -1,7 +1,24 @@
 #include "dynamic.hpp"
 
+#include "../coders/json.hpp"
+
 using namespace dynamic;
 
+std::ostream& operator<<(std::ostream& stream, const dynamic::Value& value) {
+    stream << json::stringify(value, false, " ");
+    return stream;
+}
+
+std::ostream& operator<<(std::ostream& stream, const dynamic::Map_sptr& value) {
+    stream << json::stringify(value, false, " ");
+    return stream;
+}
+
+std::ostream& operator<<(std::ostream& stream, const dynamic::List_sptr& value) {
+    stream << json::stringify(value, false, " ");
+    return stream;
+}
+
 std::string List::str(size_t index) const {
     const auto& value = values[index];
     switch (static_cast<Type>(value.index())) {

src/data/dynamic.hpp

@@ -137,4 +137,8 @@ namespace dynamic {
     };
 }
 
+std::ostream& operator<<(std::ostream& stream, const dynamic::Value& value);
+std::ostream& operator<<(std::ostream& stream, const dynamic::Map_sptr& value);
+std::ostream& operator<<(std::ostream& stream, const dynamic::List_sptr& value);
+
 #endif // DATA_DYNAMIC_HPP_