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Author SHA1 Message Date
Leonardo de Moura
f43db96e1f fix(frontends/lean/pp): pretty printer for Type 
Add parenthesis around Type when it has a universe.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 15:24:45 -08:00
Leonardo de Moura
ae01d3818d fix(frontends/lean/parser): parse_type method 
The parser had a nasty ambiguity. For example,
    f Type 1
had two possible interpretations
    (f (Type) (1))
or
    (f (Type 1))

To fix this issue, whenever we want to specify a particular universe, we have to precede 'Type' with a parenthesis.
Examples:
    (Type 1)
    (Type U)
    (Type M + 1)

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 15:24:34 -08:00
Leonardo de Moura
46627289b8 fix(kernel/expr): avoid '_' as a binder name, we use '_' as a placeholder in the Lean frontend 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 14:47:53 -08:00
Leonardo de Moura
d3d24696f4 feat(frontends/lean): hide builtin object in the 'Show Environment' command 
The user can still display builtin objects by using

    Show Environment all

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 14:00:58 -08:00
Leonardo de Moura
ad3f771b1d feat(frontends/lean): hide 'explicit' version of objects with implicit arguments 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 13:12:39 -08:00
Leonardo de Moura
bff5a6bfb2 fix(frontends/lean/pp): make sure pp and parser are using the same precedences 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 12:46:14 -08:00
Leonardo de Moura
dd72269b13 feat(frontends/lean): rename command Set to SetOption 
It is not nice to have Set as a reserved keyword. See example examples/lean/set.lean

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 21:18:48 -08:00
Leonardo de Moura
42cb5d1d3c fix(tests/lean): typo 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 20:11:49 -08:00
Leonardo de Moura
79fa6e4940 feat(frontends/lean): Scopes in the default Lean frontend 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 17:40:21 -08:00
Leonardo de Moura
2aaa9a5273 feat(frontends/lean/parser): change function application precedence 
Now, we can write

  Pi (x y : A), R x y -> R y x

instead of

  Pi (x y : A), (R x y) -> (R y x)

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 12:44:15 -08:00
Leonardo de Moura
10f28c7bec feat(kernel/replace_fn): non-recursive replace_fn 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 16:35:39 -08:00
Leonardo de Moura
c53233ea26 fix(kernel/normalizer): avoid svalue hack, use 'semantic attachments' for implementing closures, include context in the closure 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 14:33:42 -08:00
Leonardo de Moura
09b51a0fb7 fix(library/elaborator): missing condition 
The elaborator was missing solutions because of the missing condition at is_simple_ho_match.

This commit also adds a new test that exposes the problem.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-16 17:13:36 -08:00
Leonardo de Moura
5b29fd8d93 test(tests/lean): add ExistsElim test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-16 15:43:09 -08:00
Leonardo de Moura
8f5c2b7d9f feat(library/basic_thms): add Refute theorem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-16 12:03:31 -08:00
Leonardo de Moura
8f9405c8b3 fix(library/elaborator): tag meta_app constraints of the form 'ctx |- m?[inst:i v] t1 =:= t2' as expensive 
This commits also adds a new unit test that demonstrates non-termination due to this kind of constraint.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-16 09:39:02 -08:00
Leonardo de Moura
2972fb9d8c test(tests/lean): new elaborator tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-15 22:00:26 -08:00
Leonardo de Moura
61bd27ff06 fix(library/elaborator): bug in simple_ho_match 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-15 21:48:55 -08:00
Leonardo de Moura
19ad39159e feat(library/basic_thms): add ForallIntro theorem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-15 17:35:31 -08:00
Leonardo de Moura
82dfb553d5 feat(library/basic_thms): add ExistsIntro theorem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-15 16:26:23 -08:00
Leonardo de Moura
993bea8206 refactor(library/elaborator): improve elaborator state data-structure 
The "quota" hack used before this commit was inefficient, and too hackish.
This commit uses two lists of constraints: active and delayed.
The delayed constraints are only processed when there are no active constraints.
We use a simple index to quickly find which delayed constraints have assigned metavariables.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

checkpoint

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-14 23:27:08 -08:00
Leonardo de Moura
3d30664611 feat(kernel/type_checker): provide the metavar_env to instantiate, it will minimize the number of local_entries needed 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-14 15:13:56 -08:00
Leonardo de Moura
4357c9196e feat(kernel/metavar): make sure that a metavariable 'm' can only be assigned to a term that contains free variables available in the context associated with 'm' 
This commit also simplifies the method check_pi in the type_checker and type_inferer.
It also fixes process_meta_app in the elaborator.
The problem was in the method process_meta_app and process_meta_inst.
They were processing convertability constrains as equality constraints.
For example, process_meta_app would handle

    ctx |- Type << ?f b

as

    ctx |- Type =:= ?f b

This is not correct because a ?f that returns (Type U) for b satisfies the first but not the second.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-14 12:25:00 -08:00
Leonardo de Moura
bbaa83e16a feat(frontends/lean): implement relaxed operator compatibility in the parser 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-10 15:42:43 -08:00
Leonardo de Moura
6b1b6c7bd1 feat(tests/lean): include standard error in the expected output 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-10 12:52:57 -08:00
Leonardo de Moura
90f88acf42 feat(frontends/lean): relax compatible_denotation predicate 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-10 12:42:29 -08:00
Leonardo de Moura
abe2cf2fb5 feat(frontends/lean): simplify how implicit parameters are marked 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-10 12:11:04 -08:00
Leonardo de Moura
78ec4b152b feat(frontends/lean): relax restricitions on parsing applications of functions containing implicit arguments 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-10 09:48:24 -08:00
Leonardo de Moura
0cd8e3e76b feat(split-stack): add support for split-stacks (no more stackoverflows) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-09 22:30:54 -08:00
Leonardo de Moura
0eaa98221b fix(shell/lean): Lua repl missing, incorrect exit code in interactive mode, missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-09 12:25:19 -08:00
Leonardo de Moura
3ea09daf44 fix(frontends/lean/frontend): is_coercion for environment objects that have parents 
Bug was exposed by tests/lua/coercion_bug1.lua

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 17:47:00 -08:00
Leonardo de Moura
2a80807fef refactor(frontends/lean/pp): replace weak_ref with a strong reference, add new function (lean_formatter) for creating a Lean object formatter in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 17:33:18 -08:00
Leonardo de Moura
68c2e5cc7d fix(frontends/lean/parser): reachable code 
The new test nbug1.lean exposes the problem.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 15:22:21 -08:00
Leonardo de Moura
04b67f8b14 refactor(kernel/object): remove 'null' object, and operator bool for kernel objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 14:37:38 -08:00
Leonardo de Moura
3e1fd06903 refactor(kernel/expr): remove 'null' expression, and operator bool for expression 
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
1ff6013594 fix(frontends/lean/frontend_elaborator): must elaborate type attached to placeholder, it may also contain holes 
The test tactic14.lean exposes the problem.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-07 15:37:59 -08:00
Leonardo de Moura
e2999d3ff6 feat(*): add component name to check_stack and check_system 
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
33b72f1dd0 feat(frontends/lean/parser): apply type inference elaborator to fill remaining metavariables/holes (these are holes produced by tactics such as apply_tac) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-07 13:09:39 -08:00
Leonardo de Moura
a75d05fdb4 fix(tests/lean/interactive): test driver (to avoid discrepancy between Win and Linux version) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 17:03:12 -08:00
Leonardo de Moura
daadff548e fix(tests/lean): update expected result to reflect recent changes 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 16:31:13 -08:00
Leonardo de Moura
015bff8283 fix(library/tactic/goal): to_goal way of handling context_entries of the form (name, domain, body) where domain is null, and body is a proof term 
This commit fixes a problem exposed by t13.lean.
It has a theorem of the form:

Theorem T1 (A B : Bool) : A /\ B -> B /\ A :=
     fun assumption : A /\ B,
          let lemma1 := (show A by auto),
              lemma2 := (show B by auto)
          in (show B /\ A by auto)

When to_goal creates a goal for the metavariable associated with (show B /\ A by auto) it receives a context and proposition of the form

 [ A : Bool, B : Bool, assumption : A /\ B, lemma1 := Conjunct1 assumption, lemma2 := Conjunct2 assumption ] |- B /\ A

The context_entries "lemma1 := Conjunct1 assumption" and "lemma2 := Conjunct2 assumption" do not have a domain (aka type).
Before this commit, to_goal would simply replace and references to "lemma1" and "lemma2" in "B /\ A" with their definitions.
Note that, "B /\ A" does not contain references to "lemma1" and "lemma2". Then, the following goal is created
     A : Bool, B : Bool, assumption : A /\ B |- B /\ A
That is, the lemmas are not available when solving B /\ A.
Thus, the tactic auto produced the following (weird) proof for T1, where the lemmas are computed but not used.

    Theorem T1 (A B : Bool) (assumption : A ∧ B) : B ∧ A :=
            let lemma1 := Conjunct1 assumption,
                lemma2 := Conjunct2 assumption
            in Conj (Conjunct2 assumption) (Conjunct1 assumption)

This commit fixed that. It computes the types of "Conjunct1 assumption" and "Conjunct2 assumption", and creates the goal
     A : Bool, B : Bool, assumption : A /\ B, lemma1 : A, lemma2 : B |- B /\ A

After this commit, the proof for theorem T1 is

Theorem T1 (A B : Bool) (assumption : A ∧ B) : B ∧ A :=
    let lemma1 := Conjunct1 assumption,
        lemma2 := Conjunct2 assumption
    in Conj lemma2 lemma1

as expected.

Finally, this example suggests that the encoding

Theorem T1 (A B : Bool) : A /\ B -> B /\ A :=
     fun assumption : A /\ B,
          let lemma1 : A := (by auto),
              lemma2 : B := (by auto)
          in (show B /\ A by auto)

is more efficient than

Theorem T1 (A B : Bool) : A /\ B -> B /\ A :=
     fun assumption : A /\ B,
          let lemma1 := (show A by auto),
              lemma2 := (show B by auto)
          in (show B /\ A by auto)

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 16:14:25 -08:00
Leonardo de Moura
0390f3c39b feat(library/tactic/boolean_tactics): avoid unnecessary Let expression in proof terms 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 15:01:54 -08:00
Leonardo de Moura
1df9d18891 feat(frontends/lean): allow 'tactic hints' to be associated with 'holes' 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 14:49:39 -08:00
Leonardo de Moura
2ddcc32c1d fix(frontends/lean/notation): change the precedence of '->' 
It should match the precedence of the implication '=>'.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 13:23:24 -08:00
Leonardo de Moura
fa03ae2a26 fix(library/elaborator): strength elaborator procedure for handling equality and convertability constraints 
This commit improves the condition for showing that an equality(and convertability) constraint cannot be solved. A nice consequence is that Lean produces nicer error messages. For example, the error message for unit test elab1.lean is more informative.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 13:04:34 -08:00
Leonardo de Moura
d46cf5fdd5 fix(frontends/lean/parser): display failed state in noninteractive mode, stop processing tactic commands when a Lean command is found 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 05:13:29 -08:00
Leonardo de Moura
13f9454fe1 feat(library/tactic/proof_state): add option tactic::proof_state::goal_names 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 21:18:22 -08:00
Leonardo de Moura
e6fb6f7d1e feat(frontends/lean/parser): add assumption command, and allow Lean expressions (proof terms) to be used with apply tactic command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 20:08:51 -08:00
Leonardo de Moura
0c059a9917 feat(library/tactic): use _tac suffix instead of _tactic like Isabelle 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 20:06:32 -08:00
Leonardo de Moura
1b176204b4 feat(frontends/lean/parser): allow the user to use a theorem/axiom name as an argument for the apply tactic command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 19:03:12 -08:00
Leonardo de Moura
e1d44eec6b fix(frontends/lean/parser): bug in parse_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 17:40:55 -08:00
Leonardo de Moura
a564795fe6 fix(frontends/lean/parser): remove unnecessary '#' after error 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 17:27:08 -08:00
Leonardo de Moura
74a8b5f2f4 test(tests/lean/interactive): add back command test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 17:19:53 -08:00
Leonardo de Moura
e069ce640b feat(frontends/lean/parser): add tactic abort command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 17:15:19 -08:00
Leonardo de Moura
34654ad06b feat(tests/lean/interactive): add interactive mode test script 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 16:56:20 -08:00
Leonardo de Moura
e3848d43a2 feat(frontends/lean): improve tactic command parsing in interactive mode 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 16:28:08 -08:00
Leonardo de Moura
fa98c1358f feat(library/tactic): add disj_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 04:49:06 -08:00
Leonardo de Moura
029ef57abd feat(library/tactic): add apply_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 03:22:12 -08:00
Leonardo de Moura
e60e20a11d feat(frontends/lean): add Exit command 
Remark: on Windows, Ctrl-D does not seem to work.
So, this commit also changes the Lean startup message.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-04 10:40:22 -08:00
Leonardo de Moura
8e53643b61 feat(library/fo_unify): first order unification 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-03 12:21:21 -08:00
Leonardo de Moura
dd62af1641 feat(frontends/parser): simplified theorem definition using tactical proof 
When using tactics for proving theorems, a common pattern is

     Theorem T : <proposition> := _.
          apply <tactic>.
          ...
          done.

This commit allows the user to write the simplified form:

     Theorem T : <proposition>.
          apply <tactic>.
          ...
          done.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-02 08:20:18 -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
1ec8f9d536 feat(kernel): add abstraction (aka function extensionality) axiom 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-01 13:57:14 -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
70e06f8e86 feat(library/hidden_defs): hidden definitions are just hints for tactics and solvers 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-01 10:27:27 -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
f91c4901e8 feat(library/tactic): add absurd_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-01 07:55:00 -08:00
Leonardo de Moura
bf2adb20e7 feat(library/tactic): add disj_hyp_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-01 07:55:00 -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
98897b467d feat(frontends/lean/parser): add support for Lua expression code blocks 
In expression code blocks, we do not have to write a "return".
After this commit, the argument of an apply command is a Lua expression instead of a Lua block of code. That is, we can now write

apply (** REPEAT(ORELSE(imp_tactic, conj_tactic, conj_hyp_tactic, assumption_tactic)) **)

instead of

apply (** return REPEAT(ORELSE(imp_tactic, conj_tactic, conj_hyp_tactic, assumption_tactic)) **)

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-29 10:21:24 -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
20a36e98ec feat(library/elaborator): modify how elaborator handles constraints of the form ?M << P and P << ?M, where P is a proposition. 
Before this commit, the elaborator would only assign ?M <- P, if P was normalized. This is bad since normalization may "destroy" the structure of P.

For example, consider the constraint
[a : Bool; b : Bool; c : Bool] ⊢ ?M::1 ≺ implies a (implies b (and a b))

Before this, ?M::1 will not be assigned to the "implies-term" because the "implies-term" is not normalized yet.
So, the elaborator would continue to process the constraint, and convert it into:

[a : Bool; b : Bool; c : Bool] ⊢ ?M::1 ≺ if Bool a (if Bool b (if Bool (if Bool a (if Bool b false true) true) false true) true) true

Now, ?M::1 is assigned to the term
     if Bool a (if Bool b (if Bool (if Bool a (if Bool b false true) true) false true) true) true

This is bad, since the original structure was lost.

This commit also contains an example that only works after the commit is applied.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-29 09:15:01 -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
7ed78815e0 fix(tests/lua): incorrect assertion 
The assertion got violated after a bug was fixed in the to_goal procedure.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 21:53:57 -08:00
Leonardo de Moura
5dfb3b8b56 feat(frontends/lean/parse): allow script-code blocks to be used in the apply command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 21:48:30 -08:00
Leonardo de Moura
c6b05bcfcb feat(library/tactic): modify assumption_tactic, it should fail if not applicable, and TRY tactical 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 18:23:38 -08:00
Leonardo de Moura
e3f3ec5553 feat(library/tactic): expose conj_tactic, imp_tactic, conj_hyp_tactic in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 18:17:15 -08:00
Leonardo de Moura
662fb71d59 chore(tests/lua/threads): fix type in file name 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 13:12:54 -08:00
Leonardo de Moura
ce674d2d43 feat(library/tactic): execute Lua tactics using coroutines 
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 
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 
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 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-27 17:47:29 -08:00
Leonardo de Moura
0934d7b2f4 fix(frontends/lua): make sure Lua 'sleep' function support interruption 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-27 13:25:06 -08:00
Leonardo de Moura
d87ad9eb7e refactor(util/lua): propagate C++ Lean exceptions in Lua 
The following call sequence is possible:
C++ -> Lua -> C++ -> Lua -> C++

The first block of C++ is the Lean main function.
The main function invokes the Lua interpreter.
The Lua interpreter invokes a C++ Lean API.
Then the Lean API invokes a callback implemented in Lua.
The Lua callback invokes another Lean API.
Now, suppose the Lean API throws an exception.
We want the C++ exception to propagate over the mixed C++/Lua call stack.
We use the clone/rethrow exception idiom to achieve this goal.

Before this commit, the C++ exceptions were converted into strings
using the method what(), and then they were propagated over the Lua
stack using lua_error. A lua_error was then converted into a lua_exception when going back to C++.
This solution was very unsatisfactory, since all C++ exceptions were being converted into a lua_exception, and consequently the structure of the exception was being lost.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-27 12:25:29 -08:00
Leonardo de Moura
99a811a586 feat(bindings/lua): expose io_state object in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-26 12:54:47 -08:00
Leonardo de Moura
861be072d8 feat(bindings/lua): add proof_state to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-26 11:34:58 -08:00
Leonardo de Moura
fd3b9e39f6 feat(bindings/lua): add cex_builder to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-26 09:17:57 -08:00
Leonardo de Moura
4d9075bdfd feat(bindings/lua): add proof_map, assignment and proof_builder to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-26 08:37:37 -08:00
Leonardo de Moura
3ebc099ec5 feat(bindings/lua/options): improve options Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-25 21:05:05 -08:00
Leonardo de Moura
feeb6d9105 feat(bindings/lua): add goal object to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-25 20:51:47 -08:00
Leonardo de Moura
7b8bd97699 feat(lua/expr): add method for extracting semantic attachment data 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-19 19:06:47 -08:00
Leonardo de Moura
a98fdd9be6 refactor(shell): combine lean and leanlua executables in a single executable 
The main motivation is to allow users to configure/extend Lean using .lua files before loading the actual .lean files.
Example:
        ./lean extension1.lua extension2.lua file.lean

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-19 16:48:21 -08:00
Leonardo de Moura
87775cbc07 chore(build): include incorrect output in the logs 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-18 15:39:55 -08:00
Soonho Kong
20756c382c test(*): split leantests, leanslowtests, leanluatests, leanluadocs into singletons 2013-11-18 18:27:11 -05:00
Leonardo de Moura
b2d1acd0b7 test(lua/environment): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-18 09:27:46 -08:00
Leonardo de Moura
1315378ebb test(*): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-18 09:13:34 -08:00
Leonardo de Moura
7976937e4c test(lua/metavar_env): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 19:18:47 -08:00
Leonardo de Moura
69be5f6c94 feat(kernel/environment): track which modules were already imported 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 18:15:44 -08:00
Leonardo de Moura
5f651d46e6 tests(lua/frontend_lean): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 13:48:29 -08:00
Leonardo de Moura
df94e44806 test(lua/expr): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 11:46:24 -08:00
Leonardo de Moura
e693c2de01 test(lua/name): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 11:25:21 -08:00
Leonardo de Moura
8a13df3ce1 test(lua/type_inferer): add missing tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 11:17:32 -08:00
Leonardo de Moura
f586e58ac3 test(lua/justification): add more tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 11:13:10 -08:00
Leonardo de Moura
d0bac61e74 fix(lua/numerics): bug in bindings, add more tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-17 11:02:44 -08:00
Leonardo de Moura
926ed0a02d feat(lua): add type_inferer object to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-16 19:18:15 -08:00
Leonardo de Moura
590b14570f feat(lua): improve error handling in Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-16 18:21:42 -08:00
Leonardo de Moura
390f7eaec8 test(kernel/typechecker): type checker 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-16 15:01:39 -08:00
Leonardo de Moura
9398ea5a59 feat(util/shared_mutex): add support for recursive lock at shared_mutex 
We need support for recursive locks. The main user of this class is
the environment object. This commit adds a test that demonstrates that
the shared_lock of the environment object may be recursively requested.
Before this fix, the Lean was deadlocking in this example.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-15 22:01:11 -08:00
Leonardo de Moura
209a2d10f7 fix(lua): replace std::mutex with std::recursive_mutex, add test that demonstrates the problem that is being fixed 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-15 21:26:16 -08:00
Leonardo de Moura
8525e8534b feat(lua): expose parse_expr and parse_commands from frontends/lean in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-15 16:11:26 -08:00
Leonardo de Moura
a74412963a chore(build): only execute lua multi-threading tests when on cygwin or linux, and using g++ 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-15 09:27:58 -08:00
Leonardo de Moura
5e170ce5fe chore(tests/lua): move examples that use threads to tests/lua/threads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-15 09:11:58 -08:00
Leonardo de Moura
b5dcb93550 feat(lua): communication channels for threads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 21:10:46 -08:00
Leonardo de Moura
3a924a5fb1 perf(lua/name): improve to_name_ext performance 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 18:06:09 -08:00
Leonardo de Moura
45858d54ae test(frontends/lean): add missing expected output 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 15:51:47 -08:00
Leonardo de Moura
6b30ebab5e test(lua): use simplified Const creation 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 15:17:00 -08:00
Leonardo de Moura
09bed4786c feat(lua): add semantic attachments for builtin arithmetical values to Lua API, improve mk_constant 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 15:15:04 -08:00
Leonardo de Moura
abe93dfec0 fix(lua/splay_tree): for_each method was crashing if the map was updated during for_each 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 13:48:23 -08:00
Leonardo de Moura
64cce595a5 feat(lua): add splay_maps to the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 13:35:36 -08:00
Leonardo de Moura
9e445d1917 feat(lua): interrupt and sleep Lua APIs 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 10:04:32 -08:00
Leonardo de Moura
691893258d feat(kernel/expr): add hash code based on allocation time 
The new hash code has the property that given expr_cell * c1 and expr_cell * c2,
if c1 != c2 then there is a high propbability that c1->hash_alloc() != c2->hash_alloc().

The structural hash code hash() does not have this property because we may have
c1 != c2, but c1 and c2 are structurally equal.

The new hash code is only compatible with pointer equality.
By compatible we mean, if c1 == c2, then c1->hash_alloc() == c2->hash_alloc().
This property is obvious because hash_alloc() does not have side-effects.

The test tests/lua/big.lua exposes the problem fixed by this commit.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-14 02:43:11 -08:00
Leonardo de Moura
ae7ea99b56 fix(lua): copy_values and add tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 21:31:27 -08:00
Leonardo de Moura
c759fc93f7 test(lua): object Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 20:59:28 -08:00
Leonardo de Moura
351ef867d2 feat(lua): add abstract, instantiate, has_free_vars, lift/lower free_vars to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 17:02:49 -08:00
Leonardo de Moura
ed3cf8152b feat(lua): add for_each to expr Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 16:30:59 -08:00
Leonardo de Moura
3dea7ae0d6 test(frontends/lean): example mixing Lean and Lua 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 16:07:15 -08:00
Leonardo de Moura
1bf6051866 test(lua): expr LUA API test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 15:29:31 -08:00
Leonardo de Moura
9a22702383 feat(lua): make objects() and localobjects() methods return iterators in the environment LUA API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 14:26:01 -08:00
Leonardo de Moura
8c52d47692 chore(lua): rename env() to get_env() 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 13:58:51 -08:00
Leonardo de Moura
a80adae1c3 feat(lua): add fields method to sexpr Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 12:10:24 -08:00
Leonardo de Moura
450128e28b refactor(lua): cleanup Lua bindings, and add accessor/tester to expr Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 11:46:09 -08:00
Leonardo de Moura
be093ecf90 feat(lua): use formatter available in the state object to convert Lean objects into strings in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-12 16:56:30 -08:00
Leonardo de Moura
9a5f86fce6 feat(lua): use (** ... **) instead of {{ ... }} for nested Lua scripts 
The token }} is a bad delimiter for blocks of Lua script code nested in Lean files.
The problem is that the sequence }} occurs very often in Lua code because Lua uses { and } to build tables/lists/arrays.
Here is an example of Lua code that contains the sequence }}
     t = {{1, 2}, {2, 3}, {3, 4}}

In Lean, (* ... *) is used to create comments. Thus, (** ... **) code blocks will not affect
valid Lean files. It also looks reasonably good.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-12 16:05:49 -08:00
Leonardo de Moura
8190d4fed5 feat(lua): allow Lua scripts to update 'global' options 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-12 15:38:00 -08:00
Leonardo de Moura
b986af09ed feat(lua): add support for copying closures between Lua states 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-12 12:54:34 -08:00
Leonardo de Moura
2af2a69fc6 feat(lua): expose kernel objects in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-12 09:40:29 -08:00
Leonardo de Moura
d257156b88 fix(lua): memory leaks, we should not use luaL_error because it does not unwind C++ stack 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 21:45:13 -08:00
Leonardo de Moura
a30e02d862 fix(lua): redefine Lua 'print' function, and make sure it is thread safe 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 21:15:21 -08:00
Leonardo de Moura
eb9d0f0552 test(lua): add example showing how to access/update an environment object using multiple threads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 20:53:23 -08:00
Leonardo de Moura
0af8f17834 feat(lua): allow Booleans to be copied between Lua states 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 20:39:46 -08:00
Leonardo de Moura
2ac594a159 test(lua): add a new example showing how to create nested State objects and threads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 18:27:09 -08:00
Leonardo de Moura
69b41eae70 feat(lua): add support for multiple execution threads in the Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 16:25:17 -08:00
Leonardo de Moura
95785c7aaa feat(lua): add State objects, it allows us to create several Lua State objects in a lua script 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 15:05:50 -08:00
Leonardo de Moura
bdc23fba32 test(lua): add tests for expr object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 13:11:31 -08:00
Leonardo de Moura
b227775a07 test(lua): add tests for format object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 12:58:47 -08:00
Leonardo de Moura
c2db18a003 test(lua): add tests for sexpr object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 09:51:07 -08:00
Leonardo de Moura
6c7be28807 test(lua): add tests for options object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 09:42:50 -08:00
Leonardo de Moura
8c140ff86f feat(lua): allow lua scripts (embedded in Lean files) to access the environment 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-10 11:14:04 -08:00
Leonardo de Moura
3078923ea4 fix(kernel/type_checker): add missing test, and kernel_exception has_no_type_exception 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-10 11:14:04 -08:00
Leonardo de Moura
9d61fcf85b feat(lua): expose environment objects in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-10 11:14:04 -08:00
Leonardo de Moura
8dd62e76be feat(lua): add mk_metavar to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-10 11:14:04 -08:00
Leonardo de Moura
554defe89d feat(lua): expose local_context objects in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-09 12:18:46 -08:00
Leonardo de Moura
ad2de3b53c feat(lua): expose level objects in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-08 17:08:24 -08:00
Leonardo de Moura
5a97f730af feat(lua): add Type function 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-08 15:52:58 -08:00
Leonardo de Moura
32605d8266 feat(lua): expose level objects in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-08 15:38:00 -08:00
Leonardo de Moura
cc17be1ef1 feat(lua): add is_* predicates 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-08 12:40:28 -08:00
Leonardo de Moura
5c35a9ad0a feat(lua): add Consts function 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-08 12:09:46 -08:00
Leonardo de Moura
b57ad80d5e feat(lua): expose basic API for Lean expressions in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 21:54:57 -08:00
Leonardo de Moura
9000c7c2fa feat(lua): expose format objects in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 21:54:42 -08:00
Leonardo de Moura
57b9657bf0 feat(lua): add lua_exception for wrapping lua errors, and improve Lua error messages in the Lean frontend 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 15:19:26 -08:00
Leonardo de Moura
a9b2be0b9c feat(frontends/lean): add support for embedded Lua scripts in Lean files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 13:56:04 -08:00
Leonardo de Moura
9c60eed93c refactor(kernel/metavar): avoid using unique names for default metavariable prefix 
The problem is that unique names depend on the order compilation units are initialized. The order of initialization is not specified by the C++ standard. Then, different compilers (or even the same compiler) may produce different initialization orders, and consequently the metavariable prefix is going to be different for different builds. This is not a bug, but it makes unit tests to fail since the output produced by different builds is different for the same input file.
Avoiding unique name feature in the default metavariable prefix avoids this problem.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 10:16:25 -08:00
Leonardo de Moura
76150620c3 test(lua): use assertions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-05 13:21:01 -08:00
Leonardo de Moura
ba3faea586 test(lua): add test driver for Lua binding tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-05 13:11:34 -08:00
Leonardo de Moura
0cc475e581 fix(lua/sexpr): make sexpr bindings robust 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-05 13:03:32 -08:00
Leonardo de Moura
56344c0541 test(lua): add more s-exprs Lua tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-04 21:31:29 -08:00
Leonardo de Moura
f13a97397f feat(lua): expose s-expressions in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-04 19:58:32 -08:00
Leonardo de Moura
3c475e890d refactor(lua/options): improve options bindings for Lua 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-04 18:46:58 -08:00
Leonardo de Moura
7b77863507 refactor(lua/name): improve name bindings for Lua 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-04 18:44:20 -08:00
Leonardo de Moura
9884c056ce feat(lua): allow Lean to be compiled with Lua 5.1 and LuaJit 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-03 12:40:44 -08:00
Leonardo de Moura
e2da8c1f4d feat(lua/numerics): expose mpz and mpq numbers in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-03 12:05:54 -08:00
Leonardo de Moura
dbf2d56c77 feat(lua/name): expose hierarchical names in the Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-02 20:49:42 -07:00
Leonardo de Moura
bf998d8661 feat(frontends/lean/parser): allow 'typeless' definitions, the type is inferred by the system 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-01 08:51:49 -07:00
Leonardo de Moura
96dcd003c6 fix(frontends/lean/parser): associated position with 'type' placeholder 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-31 16:27:36 -07:00
Leonardo de Moura
aa99ac6618 feat(kernel/value): allow semantic attachments to use coercions when being pretty printed 
For example, this feature is useful when displaying the integer value 10 with coercions enabled. In this case, we want to display "nat_to_int 10" instead of "10".

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-30 11:42:26 -07:00
Leonardo de Moura
032f5cd7b3 feat(frontends/lean): make the 'expression template' argument in Subst implicit because higher-order matching can infer it. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-30 10:45:43 -07:00
Leonardo de Moura
bc92671ae4 fix(frontends/lean/notation): adjust the implicit arguments of TransExt, and add new test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 17:12:50 -07:00
Leonardo de Moura
e3228b1f5c test(frontends/lean): add 'l = nil' test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 16:30:03 -07:00
Leonardo de Moura
4dd6cead83 refactor(equality): make homogeneous equality the default equality 
It was not a good idea to use heterogeneous equality as the default equality in Lean.
It creates the following problems.

- Heterogeneous equality does not propagate constraints in the elaborator.
For example, suppose that l has type (List Int), then the expression
     l = nil
will not propagate the type (List Int) to nil.

- It is easy to write false. For example, suppose x has type Real, and the user
writes x = 0. This is equivalent to false, since 0 has type Nat. The elaborator cannot introduce
the coercion since x = 0 is a type correct expression.

Homogeneous equality does not suffer from the problems above.
We keep heterogeneous equality because it is useful for generating proof terms.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 16:20:06 -07:00
Leonardo de Moura
d0009d0242 feat(frontends/lean): make the first argument of if-expression implicit, add support for marking implicit arguments on builtin symbols (aka semantic attachments) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 15:53:50 -07:00
Leonardo de Moura
2d88922543 feat(frontends/lean/elaborator): solve easy overloads at preprocessing time 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 10:07:15 -07:00
Leonardo de Moura
7c8daf8974 fix(kernel/metavar): make sure the justification and substitution are always matching each other 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 02:39:52 -07:00
Leonardo de Moura
2c6d4d2225 fix(kernel/normalizer): do not apply substitutions in the normalizer 
It is incorrect to apply substitutions during normalization.
The problem is that we do not have support for tracking justifications in the normalizer. So, substitutions were being silently applied during normalization. Thus, the correctness of the conflict resolution in the elaboration was being affected.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 02:14:48 -07:00
Leonardo de Moura
dbefc91151 fix(kernel/metavar): add normalize assignment justification 
We need that when we normalize the assignment in a metavariable environment.
That is, we replace metavariable in a substitution with other assignments.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-27 11:02:34 -07:00
Leonardo de Moura
cb06d0a959 test(frontends/lean): add example showing higher order matching is working, and is useful 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 20:18:48 -07:00
Leonardo de Moura
02c22e509d fix(tests/lean): remove obsolete comments 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 20:16:02 -07:00
Leonardo de Moura
250cf70410 test(frontends/lean): all 'bad' examples can be solved 
Move them to the main test directory

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 20:12:58 -07:00
Leonardo de Moura
c1c1af4b98 fix(tests/lean): add parenthesis 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 20:04:50 -07:00
Leonardo de Moura
a5c3829d1b feat(kernel): add unexpected_metavar_occurrence exception 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 19:56:44 -07:00
Leonardo de Moura
46b9b2114a fix(tests/lean): adjust error messages in the expected output 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 19:27:26 -07:00
Leonardo de Moura
e55fb4f165 fix(tests/lean): adjust expected results, the new result is also acceptable 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 17:54:09 -07:00
Leonardo de Moura
d2f9c24d3c fix(tests/lean): adjust tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 15:42:17 -07:00
Leonardo de Moura
a7f94b55db fix(frontends/lean/elaborator): fix bugs and adjust tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 15:29:56 -07:00
Leonardo de Moura
29ad71f9fc test(conversion): add more conversion tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-15 15:35:08 -07:00
Leonardo de Moura
99a163f11d Simplify metavariable context. Now, we have only 'lift' and 'inst' instead of 'subst', 'lift' and 'lower' 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-16 19:32:28 -07:00
Leonardo de Moura
63e102055e Move metavariables to the kernel. This is the first step for implementing the new elaborator. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-15 12:09:01 -07:00
Leonardo de Moura
4c67721d32 Fix test error on Cygwin 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-09 18:35:11 -07:00
Leonardo de Moura
d912c9cd09 Add more 'bad' examples 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-09 09:19:49 -07:00
Leonardo de Moura
0a08494f4d Add another bad example for current elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-08 23:21:43 -07:00
Leonardo de Moura
2ca30571b4 Display the input term in the output of the Check command. It is useful to see the fully elaborated term. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-08 22:55:21 -07:00