modernc.org/ccgo/v3@v3.16.14/lib/testdata/tcc-0.9.27/tests/pp/01.c (about)

     1  #define hash_hash # ## #
     2  #define mkstr(a) # a
     3  #define in_between(a) mkstr(a)
     4  #define join(c, d) in_between(c hash_hash d)
     5  char p[] = join(x, y);
     6  // char p[] = "x ## y";