c++ operator overloading for repetition operator on string

So, it's been a while since I have written anything in C++ and now I'm working on a project using C++11 and macros.

I know that by using the stringify operator I can do this:

#define TEXT(a) #a    //converts to "a"

How am I supposed to use the preprocessor for recognizing the tokens like + and * to do this:

#define TEXT(a)+ ???  //want to convert to "a+"
#define TEXT(a)* ???  //want to convert to "a*"

when the input has to be in that syntax?