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Author SHA1 Message Date
Leonardo de Moura
ecd62a1783 refactor(builtin/basic): rename basic.lean to kernel.lean 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 11:46:03 -08:00
Leonardo de Moura
4401b390fe refactor(library/arith): do not load specialfn by default 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 11:25:43 -08:00
Leonardo de Moura
46a8300a2d refactor(library/arith): move real and special function declarations to .lean files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 11:02:22 -08:00
Leonardo de Moura
c3bc6afb12 refactor(library/arith): move int and nat declarations to .lean files. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 10:32:14 -08:00
Leonardo de Moura
15621610e9 refactor(library/arith): replace Nat, Int, Real with simple variable decls instead of semantic attachments 
This commit also fixes bugs in the Alias command.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 17:04:36 -08:00
Leonardo de Moura
a1a5fb101d feat(frontends/lean): add Alias command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 16:25:45 -08:00
Leonardo de Moura
dfe46b9d25 refactor(kernel/builtin): move definition and axioms to basic.lean 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 14:01:30 -08:00
Leonardo de Moura
f8b82d854e feat(builtin/basic): add TypeM alias 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 13:03:32 -08:00
Leonardo de Moura
411ebbc3c1 refactor(library/basic_thms): move the proof of all basic theorems to a .Lean file 
This commit also adds several new theorems that are useful for implementing the simplifier.
TODO: perhaps we should remove the declarations at basic_thms.h?

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 03:04:49 -08:00
Leonardo de Moura
41c1010043 feat(frontends/lean/parser): make Import command use binary Lean files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 19:20:04 -08:00
Leonardo de Moura
1fd81dd3a1 feat(frontends/lean/parser): disable verbose messages when importing files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 12:24:13 -08:00
Leonardo de Moura
44a31dd8fb feat(frontends/lean/parser): improve Import command 
- The extension does not have to be provided.
- It can also import Lua files.
- Hierachical names can be used instead of strings.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 12:05:01 -08:00
Leonardo de Moura
8e86d6578c fix(tests/lean): adjust tests to reflect modifications in the pp 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-27 18:38:45 -08:00
Leonardo de Moura
3f0279b88c refactor(frontends/lua): replace lean.lua.h with util.lua 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 19:49:26 -08:00
Leonardo de Moura
275f022d79 fix(tests/lean): ignore lines containing 'executing external script' in test scripts, these lines contain references to the path where Lean was built 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 18:41:01 -08:00
Leonardo de Moura
f1b97b18b4 refactor(frontends/lean/parser): tactic macros, and tactic Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 15:54:53 -08:00
Leonardo de Moura
ef18cc4a92 fix(frontends/lean/parser): add existing command macros when creating parser object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 13:38:14 -08:00
Leonardo de Moura
8e4560a866 feat(frontends/lean/parser): protect imported modules from Lua definitions and macros in the file importing the module 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 13:21:36 -08:00
Leonardo de Moura
ba02132a90 feat(frontends/lean/parser): add command macros 
The idea is to allow users to define their own commands using Lua.
The builtin command Find is now written in Lua.
This commit also fixes a bug in the get_formatter() Lua API.
It also adds String arguments to macros.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 13:00:28 -08:00
Leonardo de Moura
480781d13e feat(frontends/lean/parser): provide environment as an argument to macros, allow macros to parse tactics 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-26 11:15:45 -08:00
Leonardo de Moura
3673f2ac1d feat(frontends/lean/parser): add Find command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-25 18:31:52 -08:00
Leonardo de Moura
a3dde29f3c feat(frontends/lua/parser): allow users to specify the precedence of macros 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-25 12:27:56 -08:00
Leonardo de Moura
88235d2922 feat(library/tactic/apply_tactic): try other solutions produced by the elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-25 11:51:27 -08:00
Leonardo de Moura
8e45064f25 feat(library/tactic/apply_tactic): improved parametric apply_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 22:40:34 -08:00
Leonardo de Moura
c87e965f86 fix(tests/lean/tactic14.lean): typo 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 21:36:49 -08:00
Leonardo de Moura
cb95b14332 feat(library/tactic/apply_tactic): improve apply_tactic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 14:23:06 -08:00
Leonardo de Moura
879ab6924a tests(test/lean): remove 'Importing...' message, the tests using the Import command fail when running on a different machine 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 12:26:53 -08:00
Leonardo de Moura
00e89190c2 refactor(library/cast): use .lean file instead of .cpp file to define casting library 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-23 22:04:19 -08:00
Leonardo de Moura
8c8cefcb0c feat(frontends/lean/parser): compact definitions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-23 21:24:50 -08:00
Leonardo de Moura
5043cc75f6 fix(frontends/lean/parser): allow parenthesis in level expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-23 13:31:55 -08:00
Leonardo de Moura
2c30b87f30 test(tests/lean): ExistsElim test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-23 12:57:25 -08:00
Leonardo de Moura
baf99779dc feat(frontends/lean/frontend_elaborator): use is_convertible to minimize number of coercions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-22 17:57:51 -08:00
Leonardo de Moura
65f7217935 fix(tests/lean/norm_tac): display implicit parameters to make sure output can be parsed 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-22 17:11:36 -08:00
Leonardo de Moura
3e32d9bef2 feat(library/tactic): add support for Pi's at to_proof_state 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-22 16:40:55 -08:00
Leonardo de Moura
104bd990e1 feat(library/tactic): add normalize_tac, eval_tac and trivial_tac 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-22 14:10:42 -08:00
Leonardo de Moura
4229e498d2 refactor(kernel/type_checker): combine type_checker and type_inferer into a single class, and avoid code duplication 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-22 11:51:38 -08:00
Leonardo de Moura
9128a437b8 refactor(library/cast): replace cast semantic attachment with axioms, add heterogeneous symmetry axiom 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 18:23:37 -08:00
Leonardo de Moura
df58eb132e feat(frontends/lean): simplify explicit version names 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 17:05:25 -08:00
Leonardo de Moura
36b2ec9abb fix(library/cast): bugs in Cast semantic attachment 
TODO: revise cast semantic attachment.
It should be axioms instead of semantic attachments.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 16:16:54 -08:00
Leonardo de Moura
aebff0b4d3 fix(library/type_inferer): bug in get_range method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 14:55:07 -08:00
Leonardo de Moura
55d46b2f88 test(tests/lean): add new normalizer/elaborator test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 06:43:25 -08:00
Leonardo de Moura
9444c1f47f test(tests/lean): add example that cannot be elaborated 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 04:19:53 -08:00
Leonardo de Moura
fddcdb8f40 fix(library/elaborator): bug in process_lower 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 04:13:14 -08:00
Leonardo de Moura
66f106da8c test(tests/lean): new error msg test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 03:20:04 -08:00
Leonardo de Moura
ce84fe5d33 feat(frontends/lean): improve error messages when elaborator cannot instantiate all metavariables 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 22:00:50 -08:00
Leonardo de Moura
bb81311e0a feat(frontends/lean/parser): include proof state in exception for tactic failure 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 17:15:12 -08:00
Leonardo de Moura
7772c16033 refactor(kernel): add unfold_opaque flag to normalizer, modify how type checker uses the opaque flag, remove hidden_defs, and mark most builtin definitions as opaque 
After this commit, in the type checker, when checking convertability, we first compute a normal form without expanding opaque terms.
If the terms are convertible, then we are done, and saved a lot of time by not expanding unnecessary definitions.
If they are not, instead of throwing an error, we try again expanding the opaque terms.
This seems to be the best of both worlds.
The opaque flag is a hint for the type checker, but it would never prevent us from type checking  a valid term.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 12:47:47 -08:00
Leonardo de Moura
812c1a2960 feat(library/elaborator): only expand definitions that are not marked as hidden 
The elaborator produces better proof terms. This is particularly important when we have to prove the remaining holes using tactics.
For example, in one of the tests, the elaborator was producing the sub-expression

 (λ x : N, if ((λ x::1 : N, if (P a x x::1) ⊥ ⊤) == (λ x : N, ⊤)) ⊥ ⊤)

After, this commit it produces

 (λ x : N, ¬ ∀ x::1 : N, ¬ P a x x::1)

The expressions above are definitionally equal, but the second is easier to work with.

Question: do we really need hidden definitions?
Perhaps, we can use only the opaque flag.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 02:16:49 -08:00
Leonardo de Moura
c77464703f feat(frontends/lean): macro definition using Lua 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 19:08:10 -08:00
Leonardo de Moura
b08c606696 fix(library/io_state): bug in the io_state Lua bindings 
This commit also includes a new test that exposes the problem.
The options in the io_state object were being lost.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 16:39:42 -08:00
Leonardo de Moura
2648f41eaa test(tests/lean): add new test script that checks if Lean can parse the output produced by its pretty printer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 16:16:56 -08:00
Leonardo de Moura
d9e692f506 feat(frontends/lean): improve coercion manangement 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 15:45:46 -08:00
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Leonardo de Moura
59a589037e Keep expanded form when pretty printings variable declarations with implicit marks (i.e., curly braces) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-08 11:23:46 -07:00
Leonardo de Moura
df116f88e0 Improve pretty printer for Pi's 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-08 11:04:07 -07:00
Leonardo de Moura
6bb9fc859e Add examples that demonstrate limitations of the current elaborator. The new design, we are working on, will be able to solve them. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-07 19:40:40 -07:00
Leonardo de Moura
b92bbeb83b Add casting propagation and normalization 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 20:45:26 -07:00
Leonardo de Moura
c0c2f52087 Add Cast, DomInj and RanInj. Improve operator << for lean_frontend objects. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 18:32:15 -07:00
Leonardo de Moura
b62816cc25 Fix problem with pretty printer. Add another test for elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 18:01:11 -07:00
Leonardo de Moura
edafd519e1 Add missing case to elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 17:43:08 -07:00
Leonardo de Moura
26bf7bcaac Fix bug in the elaborator. Move character ' to class A 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 17:12:35 -07:00
Leonardo de Moura
8840b37258 Fix type checker and elaborator for let expressions. Fix get_coercions (we need to pass the context). Fix pretty printer for def_type_mismatch_exception. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 11:02:00 -07:00
Leonardo de Moura
2459c4ae7c Add (optional) type to let declarations 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 10:06:26 -07:00
Leonardo de Moura
6da194334e Move 'slow' test files to different subdir. Modify CTestCustom.cmake.in to run leantests. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 08:48:12 -07:00
Leonardo de Moura
6f3b0c30fb Add 'Variables' command. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 08:48:12 -07:00
Leonardo de Moura
3dc55c452c Parse decimal values 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 08:48:12 -07:00
Leonardo de Moura
87d3961158 Improve elaborator error messages 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-04 16:36:58 -07:00
Leonardo de Moura
613d83cdf4 Improve application type mismatch errors. We also show the implicit arguments (not just their types) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-04 16:36:58 -07:00
Leonardo de Moura
be7fa0932a Add unicode name for the types: Nat, Int and Real 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-04 09:03:41 -07:00
Leonardo de Moura
e955c054ca Modify type checker. Now, it only accepts builtin values that have been declared in the environment. The idea is to be able to track which classes of builtin values have been used in a given environment. We want to be able to quantify the size of the trusted code base for a particular development. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-04 08:30:04 -07:00
Leonardo de Moura
fc9e395818 Define absolute value function and notation for it. Add new example. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 20:39:54 -07:00
Leonardo de Moura
3992c4b8f9 Define divides, and add examples 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 20:18:20 -07:00
Leonardo de Moura
51422fe654 Modify the parser for accepting expressions such as: 'fun a b, f a b', 'forall a, f a > 0', etc. This is just syntax sugar for 'fun (a : _) (b : _), f a b' and 'forall a : _, f a > 0' 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 17:24:05 -07:00
Leonardo de Moura
6f3fa63ccb Add missing test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 14:51:34 -07:00
Leonardo de Moura
a341643335 Fix unit tests for Windows 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 10:44:51 -07:00
Leonardo de Moura
544229e5d3 Create pp::unicode option. The idea is to be able to disable unicode characters, but still be able to use mixfix notation. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 10:11:45 -07:00
Leonardo de Moura
e031d7bc10 Improve error messages when overloads+coercions do not work 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 20:05:47 -07:00
Leonardo de Moura
fd44ec8d79 Improve application type mismatch error messages 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 18:28:12 -07:00
Leonardo de Moura
72188691de Add hyperbolic functions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 17:28:43 -07:00
Leonardo de Moura
4eaba93591 Add trigonometric functions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 17:03:02 -07:00
Leonardo de Moura
395513258e Define mod and unary minus 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 16:31:44 -07:00
Leonardo de Moura
abc939382b Add Real arithmetic. Fix elaborator for coercions. Now, two overloads are considered ambiguous if they need the same number of coercions. Improve pretty printer for nest infix operators with same precedence and associativity. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 13:20:00 -07:00
Leonardo de Moura
e218b92a9d Modify verbose message for Set command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 12:29:21 -07:00
Leonardo de Moura
0a67679afb Add natural numbers. Fix how coercions and overloads interact (switch to approach used in C++). Add notation for natural and integer arithmetic. Rename m and u universe variables to M and U. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 12:24:29 -07:00
Leonardo de Moura
c97e669f0c Add coercion support in the elaborator and pretty printer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-01 19:09:07 -07:00
Leonardo de Moura
42be7a4989 Add coercion declarations 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-01 18:11:28 -07:00
Leonardo de Moura
d27680d7fc Add support for overloads in the elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-01 14:54:02 -07:00
Leonardo de Moura
a3bbd9fbb5 Minimize use the colors in tests. The colors make the diff hard to read 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-01 10:34:57 -07:00
Leonardo de Moura
598daa40bc Refactor elaborator for supporting overloads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-01 10:24:10 -07:00
Leonardo de Moura
447bb6db0e Make sure we have unlimited stack space for testing the scripts 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-01 07:58:58 -07:00
Leonardo de Moura
51640ecff8 Move files in examples directory to tests directory. They are not real examples 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-31 19:16:30 -07:00
Leonardo de Moura
a5adddaf14 Add more tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-31 18:46:18 -07:00
Leonardo de Moura
389f23f356 Add test script 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-31 18:31:39 -07:00