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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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We use Errors.print for anomalies and other uncaught exceptions
in the checker: this should print the same message, it is shorter
this way, and we avoid using Errors.is_anomaly.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16310 85f007b7-540e-0410-9357-904b9bb8a0f7
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This was apparently already the case before, but this invariant is now
explicited in comments + a few asserts.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16305 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16294 85f007b7-540e-0410-9357-904b9bb8a0f7
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For the moment, are considered critical :
Sys.Break, Stack_overflow, Out_of_memory
Assert_failure, Match_failure, Anomaly, Timeout, Drop, Exit
These exceptions should normally *not* be catched by a "try",
hence the suggested code for generic "try":
try ... with e when Errors.noncritical e -> ...
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16269 85f007b7-540e-0410-9357-904b9bb8a0f7
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exception information addition facility.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16213 85f007b7-540e-0410-9357-904b9bb8a0f7
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I hope I did not forget some [with] clauses. Otherwise, some
stack frame will be missing from the debug.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16167 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16165 85f007b7-540e-0410-9357-904b9bb8a0f7
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git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16161 85f007b7-540e-0410-9357-904b9bb8a0f7
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were closed (i.e. the only remaining ones are those of printing/parsing).
Meanwhile, a simplified interface is provided in loc.mli.
This also permits to put Pp in Clib, because it does not depend on
CAMLP4/5 anymore.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15475 85f007b7-540e-0410-9357-904b9bb8a0f7
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Adds a directory ./intf for pure interfaces.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15367 85f007b7-540e-0410-9357-904b9bb8a0f7
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Util only depends on Ocaml stdlib and Utf8 tables.
Generic pretty printing and loc functions are in Pp.
Generic errors are in Errors.
+ Training white-spaces, useless open, prlist copies random erasure.
Too many "open Errors" on the contrary.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@15020 85f007b7-540e-0410-9357-904b9bb8a0f7
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Anomalies are now meant to be the exceptions that are *not*
catched and handled by the new Errors.handle_stack.
Three variants of [Errors.print] allow to customize how anomalies
are treated. In particular, [Errors.print_no_anomaly] is used
for the Fail command, instead of a classification function
Cerrors.is_user_error which wasn't customizable.
No more AnomalyOnError, its only occurrence is now a regular anomaly
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14133 85f007b7-540e-0410-9357-904b9bb8a0f7
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Instead of the monolitic Cerrors, I introduce a lightweight Errors module
whose error message can be expanded by module introducing exceptions.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14119 85f007b7-540e-0410-9357-904b9bb8a0f7
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