// insert a space between two tokens if otherwise they// would form a single token when read back #define n(x) x return (n(long)n(double))d;return n(A)n(++)n(+)n(B);return n(A)n(+)n(++)n(B);return n(A)n(++)n(+)n(+)n(B); // not a hex floatreturn n(0x1E)n(-1); // unlike gcc but correct// XXX: return n(x)+n(x)-n(1)+n(1)-2; // unlike gcc, but cannot appear in valid C// XXX: return n(x)n(x)n(1)n(2)n(x);