#define X(A, B) "test_"A"_"B"_test"
X("one", "two")

output:
(ryan@insomniac:~) cpp test.cpp                             (10:30PM/616/ttyp8)
# 1 "test.cpp"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "test.cpp"

"test_""one""_""two""_test"