EXPECT EXPAND-FN F!
EXPECT ( str-adr str-len -- )  
ansi .6.2.1390 <CORE>
input handling, see WORD and PARSE and QUERY the input string is placed at str-adr and its length 
 in => SPAN - this word is superceded by => ACCEPT

reference: p4_expect in ../src/core.c:2235, export CO EXPECT