Trigraph sequences

[Konstantin8105]

Example of C code:

#include <stdio.h>
int main(){
        printf("Eh???/n");
        return 0;
}

See par.5.2.1.1 "Trigraph sequences" http://www.dii.uchile.cl/~daespino/files/Iso_C_1999_definition.pdf
Result of GCC without flag -trigraphs if run gcc -o tri tri.c; ./tri:

tri.c: In function ‘main’:
tri.c:3:13: warning: trigraph ??/ ignored, use -trigraphs to enable [-Wtrigraphs]
  printf("Eh???/n");
             ^
Eh???/n

Result of GCC with flag -trigraphs if run gcc -o tri -trigraphs tri.c; ./tri:

Eh?

Result of CLANG without flag -trigraphs if run clang -E tri.c:

# 2 "tri.c" 2
int main(){
 printf("Eh???/n");
 return 0;
}

Result of CLANG with flag -trigraphs if run clang -E -trigraphs tri.c:

# 2 "tri.c" 2
int main(){
 printf("Eh?\n");
 return 0;
}

Result of c2go after transpilation:

func main() {
        __init()
        noarch.Printf([]byte("Eh???/n\x00"))
        return
}

Now, Trigraphs are not support in transpiler