scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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0223-macro.c (108B)

      1 #define foo []
      2 #define cat(x, y) x##y
      3 int cat(foo,_);
      4 int cat(a,foo);
      5 
      6 int
      7 main()
      8 {
      9 	return foo_ || afoo;
     10 }