Optimizing Brainfuck interpreter in the C preprocessor

Optimizing Brainfuck interpreter in the C preprocessor A C99 confirming* optimizing Brainfuck implementation written (and executed) only using the C preprocessor. *If you find something that does not confirm to the standard or is unspecified/undefined, please open an issue. Example Hello World Output #include "bf.c" BF (, I , I , I , I , I , I , I , I , B , R , I , I , I , I , B , R , I , I , R , I , I , I , R , I , I , I , R , I , L , L , L , L , D , E , R , I , R , I , R , D , R , R , I , B , L , E , L , D , E , R , R , A , R , D , D , D , A , I , I , I , I , I , I , I , A , A , I , I , I , A , R , R , A , L , D , A , L , A , I , I , I , A , D , D , D , D , D , D , A , D , D , D , D , D , D , D , D , A , R , R , I , A , R , I , I , A ) "Hello\x20World! " Multiplication (0xc*0xa) Output (0xc*0xa=0x78) #include "bf.c" BF (( c , a ), G , R , G , L , B , R , B , D , R , I , R , I , L , L , E , R , R , B , D , L , L , I , R , R , E , L , L , L , D , E , R , R , O ) "(78)" Check out ... Read full article.