#tac

Version 0.1.3 behavior is documented here. The support record separates local verification from published MoonX behavior; moonx examples use registry releases.

Write records in reverse order:

printf 'one\ntwo\n' | moonx cli/tac
printf 'a--b--' | moonx cli/tac -b -s --

-s/--separator selects a fixed separator and -b/--before places separators before records. Empty fixed separators mean NUL. Records retain their original adjoining separator, including a missing final separator. Ordered file operands insert no extra bytes; - consumes stdin. Read/open failures retain completed output and later operands continue.

-r/--regex uses the frozen GNU Emacs byte syntax: bare +/?, escaped groups/alternation, literal braces, line anchors and buffer assertions. Dot excludes LF, and POSIX bracket-class syntax is disabled in this dialect. Search selects the rightmost start and longest end inside the preceding logical prefix. Nullable patterns make backward progress; an empty regex rejects before input is opened. Input remains buffered pending the resource stage; the matcher borrows prefixes without copying the complete remainder.

#Standalone metadata

Standalone --version prints exactly tac 0.1.3 followed by one newline. Standalone --help starts with Usage: tac, lists both metadata options, and ends with a newline. Both write to stdout, leave stdin unread, and exit with status 0. Exact-version publication and verification remain recorded separately in the support record.

Source Files

main.mbt

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