border
border(chtype ls, chtype rs, chtype ts, chtype bs,
#define border(ls, rs, ts, bs, tl, tr, bl, br) \
#undef border
border(chtype ls, chtype rs, chtype ts, chtype bs,
#define border(ls, rs, ts, bs, tl, tr, bl, br) \
#undef border
border(chtype ls, chtype rs, chtype ts, chtype bs,