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31 commits

Author SHA1 Message Date
Leonardo de Moura
f80106a895 chore(*): use 'explicit operator bool' everywhere. 
operator bool() may produce unwanted conversions.
For example, we had the following bug in the code base.

...
   object const & obj = find_object(const_name(n));
   if (obj && obj.is_builtin() && obj.get_name() == n)
...

obj.get_name() has type lean::name
n              has type lean::expr

Both have 'operator bool()', then the compiler uses the operator to
convert them to Boolean, and then compare the result.
Of course, this is not our intention.

After this commit, the compiler correctly signs the error.
The correct code is

...
   object const & obj = find_object(const_name(n));
   if (obj && obj.is_builtin() && obj.get_name() == const_name(n))
...

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-02 23:02:45 -08:00
Leonardo de Moura
25978118df feat(library/tactic): add beta-reduction tactic 
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 
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 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-01 08:51:56 -08:00
Leonardo de Moura
1a221d8bbe feat(library/tactic): add focus tactical 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-30 11:28:38 -08:00
Leonardo de Moura
18eb9e427f fix(library/tactic): compilation warning 
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 
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
b3f87e2e4f feat(library/tactic): make THEN, ORELSE, APPEND, PAR and INTERLEAVE nary combinators 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 22:11:07 -08:00
Leonardo de Moura
b4a8418d38 feat(library/tactic): expose tactics in the Lua API 
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 
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
500ed7a05b refactor(library/tactic): remove dead code, make proof_state a smart pointer, cleanup 
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 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-24 16:44:02 -08:00
Leonardo de Moura
9c42a05b08 feat(library/tactic): add conj_tactic and imp_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-24 16:29:04 -08:00
Leonardo de Moura
1c607f3350 feat(library/tactic): add cond and when tacticals. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-24 12:04:32 -08:00
Leonardo de Moura
40d612eca0 feat(library/tactic): add repeat1 and determ tacticals 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-24 11:38:51 -08:00
Leonardo de Moura
cb7a5288c5 refactor(library/tactic): minimize the amount of copying in the tactic API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-24 11:27:06 -08:00
Leonardo de Moura
40a2f0a588 refactor(util/lazy_list): polish lazy_list API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-23 17:45:01 -08:00
Leonardo de Moura
d1adfd52e6 feat(library/tactic): add mk_simple_tactic template 
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 
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 
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 
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 
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 
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 
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 
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 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
5346b67651 refactor(library/state): rename Lean state object to io_state 
The idea is to make it clear that io_state is distinguish it from proof_state, and from leanlua_state.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
680ec8abba refactor(library/tactic): reorganize tactic API, add assumption_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
63bbf07f64 feat(library/tactic): add 'idtac' tactic and 'then' tactical 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
a03841c18b feat(tactic): refine tactic API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
3a6aa2dc75 feat(library/tactic): add tactic framework APIs 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-20 17:19:05 -08:00