kolibrios-gitea/programs/develop/ktcc/trunk/source/tests/pp/01.c

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#define hash_hash # ## #
#define mkstr(a) # a
#define in_between(a) mkstr(a)
#define join(c, d) in_between(c hash_hash d)
char p[] = join(x, y);
// char p[] = "x ## y";