diff options
| author |  Enrico Tassi <Enrico.Tassi@inria.fr> | 2016-05-11 14:53:46 +0200 |
|---|---|---|
| committer | Enrico Tassi <Enrico.Tassi@inria.fr> | 2016-06-06 05:48:44 -0400 |
| commit | 17f3346c5c42c16eed58bf2325aa996c3892a5e9 (patch) | |
| tree | 632e37cb16782f02fe33ef51d88ff04952a8dd9a /stm/stm.mli | |
| parent | c4789644ab4d1a88f1331efb29b69011a30f5eed (diff) | |
STM: invalid states are first class citizens
A state in the cache (document node) is now one of "Empty | Error | Valid".
This paves the way to commands/blocks-of-commands resilient-to/confining
errors: one can catch and "ignore" the exception obtained by reaching the
previous state and do something sensible, like running anyway the command
or skipping until the end of an error-confining block is reached.
Invalid states carry an enriched exception with the safe_id attached, so
that if one edits_at or observe them gets a safe place to land (CoqIDE
needs such piece of info).
Little API change in Stm.state_of_id now returning a `Error variant for
the new kind of state.
Diffstat (limited to 'stm/stm.mli')
| -rw-r--r-- | stm/stm.mli | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/stm/stm.mli b/stm/stm.mli index 6ffe0beb4..d825ff33e 100644 --- a/stm/stm.mli +++ b/stm/stm.mli @@ -122,7 +122,7 @@ type state = { proof : Proof_global.state; shallow : bool } -val state_of_id : Stateid.t -> [ `Valid of state option | `Expired ] +val state_of_id : Stateid.t -> [ `Valid of state option | `Expired | `Error of exn ] (** read-eval-print loop compatible interface ****************************** **) |