Lexical Analysis With Flex, for Flex 2.6.4: How do I abandon a file in the middle of a scan and switch to a new file?

How do I abandon a file in the middle of a scan and switch to a new file?

Just call yyrestart(newfile). Be sure to reset the start state if you want a “fresh start, since yyrestart does NOT reset the start state back to INITIAL.