$Epilog¶

Status: Stable

documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

Description¶

$Epilog
    is a symbol whose value, if any, is evaluated once when the
    Mathilda session terminates (via Quit[] or EOF).

Examples¶

No verified examples yet for this function.

Implementation notes¶

A REPL session hook, not a builtin. Registered (docstring only) in repl_hooks_init (src/repl_hooks.c). Unlike the per-line hooks, $Epilog is a bare symbol evaluated once at session teardown: repl.c calls repl_apply_epilog() on Quit[] or EOF, which — if an OwnValue is set — evaluates the symbol $Epilog (not a call) for its side effects and discards the result. Unset = no-op.

Attributes: none registered.

Implementation status¶

Stable — documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

References¶

Source: src/repl_hooks.c
Specification: docs/spec/builtins/control-flow.md

Notes & additional examples¶

Worked examples¶

In[1]:= $Epilog := Print["bye"]
Out[1]= Null

In[2]:= Quit[]
"bye"

Notes¶

$Epilog is a symbol whose value, if any, is evaluated exactly once when the session terminates via Quit[] or EOF. Assigning it with := (delayed) lets it run cleanup or a parting action at shutdown; the "bye" above is printed as the session exits.