Empirically determine value category of C++11 expression?

Question

Each expression in C++11 has a value category. One of lvalue, xvalue or prvalue.

Is there a way to write a macro that, given any expression as an argument, will pro

Answer 1

You could also try using the clang API's Classification function to return the category of the expression from a clang AST containing the expression. This is, of course, far more complex than @Luc's solution, since it requires generating the actual AST through clang.