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| author |  Emilio Jesus Gallego Arias <e+git@x80.org> | 2018-02-28 20:24:18 +0100 |
|---|---|---|
| committer | Emilio Jesus Gallego Arias <e+git@x80.org> | 2018-02-28 21:51:30 +0100 |
| commit | ae27de7dbce680e91353982bf23d568adca0d017 (patch) | |
| tree | ccb88dd09e5d940719e62531721ed87e5f15766a /toplevel/coqloop.mli | |
| parent | f726e860917b56abc94f21d9d5add7594d23bb6d (diff) | |
[toplevel] Update state when `Drop` exception is thrown [#6872]
`Drop` is implemented using exceptions-as-control flow, so the
toplevel state gets corrupted as `do_vernac` will never return when
`Drop` occurs in the input.
The right fix would be to remove `Drop` from the vernacular and make
it a toplevel-only command, but meanwhile we can just patch the state
in the exception handler.
We also need to keep the global state in `Coqloop` as the main
`coqtop` entry point won't be called by `go ()`.
Fixes #6872.
Diffstat (limited to 'toplevel/coqloop.mli')
| -rw-r--r-- | toplevel/coqloop.mli | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/toplevel/coqloop.mli b/toplevel/coqloop.mli index 1c1309051..928f3609a 100644 --- a/toplevel/coqloop.mli +++ b/toplevel/coqloop.mli @@ -35,3 +35,6 @@ val do_vernac : time:bool -> state:Vernac.State.t -> Vernac.State.t (** Main entry point of Coq: read and execute vernac commands. *) val loop : time:bool -> state:Vernac.State.t -> Vernac.State.t + +(** Last document seen after `Drop` *) +val drop_last_doc : Vernac.State.t option ref |