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This patch splits pretty printing representation from IO operations.
- `Pp` is kept in charge of the abstract pretty printing representation.
- The `Feedback` module provides interface for doing printing IO.
The patch continues work initiated for 8.5 and has the following effects:
- The following functions in `Pp`: `pp`, `ppnl`, `pperr`, `pperrnl`,
`pperr_flush`, `pp_flush`, `flush_all`, `msg`, `msgnl`, `msgerr`,
`msgerrnl`, `message` are removed. `Feedback.msg_*` functions must be
used instead.
- Feedback provides different backends to handle output, currently,
`stdout`, `emacs` and CoqIDE backends are provided.
- Clients cannot specify flush policy anymore, thus `pp_flush` et al are
gone.
- `Feedback.feedback` takes an `edit_or_state_id` instead of the old
mix.
Lightly tested: Test-suite passes, Proof General and CoqIDE seem to work.
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Command line options to be dropped got outdated after vi -> vio renaming.
This made the par: goal selector do not work in conjunction with -quick.
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The SIGINT sent to the master coqtop process was lost in a watchdog thread,
so that the STM resulted in an inconsistent state. This patch catches gracefully
the exception and kills the task as if it were normally cancelled. Note that
it probably won't work on non-POSIX architectures, but it does not really
matter because interrupt was already badly handled anyway.
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Fixes compilation of Coq with OCaml 4.03 beta 1.
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Note: they do not even seem to have a debugging purpose, so better remove
them before they bitrot.
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removing the need of thread creation in the interface.
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Instead of modifying exceptions to wear additional information, we instead use
a dedicated type now. All exception-using functions were modified to support
this new type, in particular Future's fix_exn-s and the tactic monad.
To solve the problem of enriching exceptions at raise time and recover this
data in the try-with handler, we use a global datastructure recording the
given piece of data imperatively that we retrieve in the try-with handler.
We ensure that such instrumented try-with destroy the data so that there
may not be confusion with another exception. To further harden the correction
of this structure, we also check for pointer equality with the last raised
exception.
The global data structure is not thread-safe for now, which is incorrect as
the STM uses threads and enriched exceptions. Yet, we splitted the patch in
two parts, so that we do not introduce dependencies to the Thread library
immediatly. This will allow to revert only the second patch if ever we
switch to OCaml-coded lightweight threads.
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Generalize the old model by letting one park a worker and
by letting the (parked) worker be picky about the tasks it
picks up.
The use of that is the following: a proof worker, while performing
its "main" task (building a proof term) computes all the intermediate
states but returns only its main result. One can ask the worker
to hang around, and react to special tasks, like printing the
goals of an intermediate state.
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This is mainly shuffling code around and removing internal
refs that are not needed anymore.
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stm test-suite files.
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par: distributes the goals among a number of workers given
by -async-proofs-tac-j (defaults to 2).
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