FUNC_SIG

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.

extern (C)

enum FUNC_SIG = "(const char * s1,const int s1Len," ~ "const char *s2,const int s2Len," ~ "const int open,const int gap," ~ "const parasail_matrix_t* matrix);\n";