#define A(x) C(B, D
#define D A(1))
#define C(x,y) E(y)
#define E(y) #y
A(2))
/*
 * check-name: Preprocessor #7
 * check-command: sparse -E $file
 *
 * check-output-start

"\"D\""
 * check-output-end
 */