typedef struct  s_list          t_list;
typedef struct  s_token         t_token;

struct          s_list
{
  void          *data;
  t_list        *prev;
  t_list        *next;
};

typedef enum    e_token_type
  {
    TOKEN_NEWLINE,
    TOKEN_EOF,
    TOKEN_PAR_OPEN,
    TOKEN_PAR_CLOSE,
    TOKEN_IF_AND,
    TOKEN_IF_OR,
    TOKEN_SEMICOLON,
    TOKEN_PIPE
  }             t_token_type;

struct          s_token
{
  t_token_type  type;
  char          *data;
};


const t_token   operators[] =
  {
    { TOKEN_NEWLINE, "\n" },
    { TOKEN_EOF, "\0" },
    { TOKEN_PAR_OPEN, "(" },
    { TOKEN_PAR_CLOSE, ")" },
    { TOKEN_IF_AND, "&&" },
    { TOKEN_IF_OR, "||" },
    { TOKEN_SEMICOLON, ";" },
    { TOKEN_PIPE , "|" },
    { 0, NULL }
  };