Leonardo de Moura
f97c260b0b
refactor(kernel/environment): add ro_environment
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The environment object is a "smart-pointer".
Before this commit, the use of "const &" for environment objects was broken.
For example, suppose we have a function f that should not modify the input environment.
Before this commit, its signature would be
void f(environment const & env)
This is broken, f's implementation can easilty convert it to a read-write pointer by using
the copy constructor.
environment rw_env(env);
Now, f can use rw_env to update env.
To fix this issue, we now have ro_environment. It is a shared *const* pointer.
We can convert an environment into a ro_environment, but not the other way around.
ro_environment can also be seen as a form of documentation.
For example, now it is clear that type_inferer is not updating the environment, since its constructor takes a ro_environment.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-12 16:48:34 -08:00
Leonardo de Moura
3457fe5935
chore(kernel): rename read_only_environment and read_write_environment
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-12 16:48:33 -08:00
Leonardo de Moura
8f2fe273ea
refactor(*): isolate std::thread dependency
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This commit allows us to build Lean without the pthread dependency.
It is also useful if we want to implement multi-threading on top of Boost.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-09 15:20:26 -08:00
Leonardo de Moura
8add5571f1
refactor(library/tactic): remove 'null' tactic, and operator bool tactics
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-08 15:00:16 -08:00
Leonardo de Moura
04b67f8b14
refactor(kernel/object): remove 'null' object, and operator bool for kernel objects
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-08 14:37:38 -08:00
Leonardo de Moura
2f88d6710c
feat(kernel/expr): add some_expr and none_expr for building values of type optional<expr>
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-08 10:34:38 -08:00
Leonardo de Moura
3e1fd06903
refactor(kernel/expr): remove 'null' expression, and operator bool for expression
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After this commit, a value of type 'expr' cannot be a reference to nullptr.
This commit also fixes several bugs due to the use of 'null' expressions.
TODO: do the same for kernel objects, sexprs, etc.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-07 23:21:10 -08:00
Leonardo de Moura
e2999d3ff6
feat(*): add component name to check_stack and check_system
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I also reduced the stack size to 8 Mb in the tests at tests/lean and tests/lean/slow. The idea is to simulate stackoverflow conditions.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-07 15:11:55 -08:00
Leonardo de Moura
0c059a9917
feat(library/tactic): use _tac suffix instead of _tactic like Isabelle
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-05 20:06:32 -08:00
Leonardo de Moura
fa98c1358f
feat(library/tactic): add disj_tactic
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-05 04:49:06 -08:00
Leonardo de Moura
ef069e39b0
chore(*): replace to_expr with to_nonnull_expr (when appropriate)
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The goal is to make the Lua API more robust.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-03 12:53:53 -08:00
Leonardo de Moura
25978118df
feat(library/tactic): add beta-reduction tactic
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-02 08:10:51 -08:00
Leonardo de Moura
09f98ecddc
feat(library/tactic): add unfold_tactic() that unfolds every non-hidden definition
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-01 10:41:05 -08:00
Leonardo de Moura
ca53a5a1cc
feat(library/tactic): add unfold tactic
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-01 08:51:56 -08:00
Leonardo de Moura
568931ccb1
refactor(library/tactic): remove duplicate code, add add_proofs
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-01 07:55:01 -08:00
Leonardo de Moura
1a221d8bbe
feat(library/tactic): add focus tactical
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-30 11:28:38 -08:00
Leonardo de Moura
83aaf64318
fix(library/tactic): memory leaks
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Proof/Cex builders and tactics implemented in Lua had a "strong reference" to script_state. If they are stored in the Lua state, then we get a cyclic reference.
That is, script_state points to these objects, and they point back to script_state.
To avoid this memory leak, this commit defines a weak reference for script_state objects. The Proof/Cex builders and tactics now store a weak reference to the Lua state.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-30 00:44:39 -08:00
Leonardo de Moura
18eb9e427f
fix(library/tactic): compilation warning
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-29 10:35:14 -08:00
Leonardo de Moura
f9874cd675
feat(library/tactic): add to_tactic_ext, it allows functions that return tactics to be used where a tactic is expected
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For example, after this commit, we can write
simple_tac = REPEAT(ORELSE(imp_tactic, conj_tactic)) .. assumption_tactic
instead of
simple_tac = REPEAT(ORELSE(imp_tactic(), conj_tactic())) .. assumption_tactic()
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-29 09:40:21 -08:00
Leonardo de Moura
066dacea31
feat(library/tactic): add show_tactic, and optional '.' in the end of tactic command
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-29 01:33:26 -08:00
Leonardo de Moura
b3f87e2e4f
feat(library/tactic): make THEN, ORELSE, APPEND, PAR and INTERLEAVE nary combinators
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-28 22:11:07 -08:00
Leonardo de Moura
c6b05bcfcb
feat(library/tactic): modify assumption_tactic, it should fail if not applicable, and TRY tactical
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-28 18:23:38 -08:00
Leonardo de Moura
d36a91e145
feat(library/tactic): expose COND and WHEN tacticals in Lua, add HOL-like tactical names
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-28 17:57:24 -08:00
Leonardo de Moura
ff052d41ee
chore(*): fix cygwin compilation errors
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-28 13:49:18 -08:00
Leonardo de Moura
ce674d2d43
feat(library/tactic): execute Lua tactics using coroutines
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This is very important when several Lua tactics are implemented in the
same Lua State object. In this case, even if we use the par
combinator, a Lua tactic will block the other Lua tactics running in
the same Lua State object.
With this commit, a Lua tactic can use yield to allow other tactics
in the same State object to execute.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-28 13:09:33 -08:00
Leonardo de Moura
09bc7ddf91
feat(library/tactic): add support for migratic tactic framework object between Lua states
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-28 08:03:05 -08:00
Leonardo de Moura
3dc7a856f0
refactor(library/tactic): use unprotect/protect idiom for callbacks in the tactic API
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-27 18:11:46 -08:00
Leonardo de Moura
b4a8418d38
feat(library/tactic): expose tactics in the Lua API
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-27 17:47:29 -08:00
Leonardo de Moura
c22f863114
refactor(library/tactic): improve solve method
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Now, it produces the following outcomes:
1- A proof
2- A counterexample
3- A list of (unsolved) final states
Remark: the solve method does not check whether the proof or counterexample is correct.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-25 13:04:12 -08:00
Leonardo de Moura
9a8ea0c735
feat(library/tactic): add precision and counterexample builder to proof state
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-25 11:43:16 -08:00
Leonardo de Moura
ccaa272f9a
refactor(library/tactic): simplify proof_builder API
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-25 10:50:33 -08:00
Leonardo de Moura
500ed7a05b
refactor(library/tactic): remove dead code, make proof_state a smart pointer, cleanup
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-25 10:39:40 -08:00
Leonardo de Moura
48d7afb0e8
feat(library/tactic): add trace_state_tactic
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-24 16:44:02 -08:00
Leonardo de Moura
6f05276acd
refactor(library/tactic): remove unnecessary tactic_exception
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-24 16:31:49 -08:00
Leonardo de Moura
9c42a05b08
feat(library/tactic): add conj_tactic and imp_tactic
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-24 16:29:04 -08:00
Leonardo de Moura
cb7a5288c5
refactor(library/tactic): minimize the amount of copying in the tactic API
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-24 11:27:06 -08:00
Leonardo de Moura
22c49146ae
feat(library/tactic): refine repeat and repeat_at_most tacticals
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-24 11:18:32 -08:00
Leonardo de Moura
e839787b74
refactor(library/tactic): cleanup
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-24 00:38:52 -08:00
Leonardo de Moura
40a2f0a588
refactor(util/lazy_list): polish lazy_list API
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-23 17:45:01 -08:00
Leonardo de Moura
9da95dc6e6
style(library/tactic): missing include
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-23 17:06:00 -08:00
Leonardo de Moura
16cf60a04b
refactor(library/tactic): modify par and try_for tactics
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-23 17:03:59 -08:00
Leonardo de Moura
d1adfd52e6
feat(library/tactic): add mk_simple_tactic template
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-23 15:53:45 -08:00
Leonardo de Moura
f19944cf09
refactor(util/lazy_list): 'lazier' lazy_lists
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In the new implementation, even the head of the lazy list is computed on demand.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-23 15:33:30 -08:00
Leonardo de Moura
18d114416f
feat(library/tactic): add take and force tacticals
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-22 17:05:18 -08:00
Leonardo de Moura
d258a4b7b8
feat(library/tactic): add repeat and repeat_at_most tacticals
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-22 16:39:25 -08:00
Leonardo de Moura
8bece1b53d
feat(library/tactic): add append, interleave and par tacticals
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-22 16:15:03 -08:00
Leonardo de Moura
df96068caa
fix(library/tactic): clean up try_for
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-22 15:51:17 -08:00
Leonardo de Moura
9fd594533d
refactor(library/tactic): simplify tactic framework, add orelse and try_for combinators/tacticals
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-22 15:46:43 -08:00
Leonardo de Moura
796fb3c3bf
refactor(library/tactic): remove justification_builder
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-21 17:29:06 -08:00
Leonardo de Moura
41062fdf9f
feat(library/tactic): add pretty printer for goal and proof_state objects, add solve method for tactics, add trivial example
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-11-21 17:29:06 -08:00