Marshal non-const char* as StringBuilder

[ddobrev]

There may be some gotchas such as ANSI/Unicode so some reading is needed but this can and should be done.

[genuinelucifer]

@ddobrev char* is NOT always meant to work as placeholder for a string. So how can it be differentiated if it is meant to be pointer (hence better a 'ref char') or a string (so 'StringBuilder').
In my opinion, it would however be better to marshal std::string as StringBuilder...

[ddobrev]

It's impossible to determine. So we have to use the solution which works in both cases and that is StringBuilder because in the case of a pointer to a char it would simply be a StringBuilder with a single character.
std::string represented with a StringBuilder might or might not be a good idea but in any case it's unrelated to the current issue. Also it's quite difficult because std::string is a typedef to a template type and we don't have proper support for templates yet. So if you want to develop your idea, please file another issue.