revert back to sol2

src/core/include/pw/core/debug.hpp

@@ -62,6 +62,7 @@ public:
         stream& operator << (const bool &value);
         stream& operator << (const char *value);
         stream& operator << (const std::string& value);		///! log a string
+        stream& operator << (const std::string_view& value); ///! log a string_view
 
         stream& operator << (const float &value);			///! log a float value
         stream& operator << (const double &value);			///! log a double value

src/core/src/core.cpp

@@ -22,13 +22,6 @@ template <typename T> struct module {
 template <typename T> typename module<T>::proxy module<T>::_proxy;
 
 
-struct stuff {
-
-};
-
-
-module<stuff> mod;
-
 
 }
 

src/core/src/debug.cpp

@@ -140,6 +140,12 @@ debug::stream &debug::stream::operator <<(const std::string &value)
     return *this;
 }
 
+debug::stream &debug::stream::operator <<(const std::string_view &value)
+{
+    _line.append(value.data());
+    return *this;
+}
+
 debug::stream &debug::stream::operator <<(const float &value)
 {
     std::stringstream ss;