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3635 commits

Author SHA1 Message Date
Leonardo de Moura
cfab344bcc fix(library/delayed_abstraction): fixes #1728 2017-07-05 17:10:18 -07:00
Jeremy Avigad
5fd113f50f feat(library/init/logic): add simp rule for 'true implies p' 2017-07-05 14:26:04 -07:00
Leonardo de Moura
1bc9af53f2 fix(library/init/meta/simp_tactic): fixes #1724 2017-07-05 11:59:23 -07:00
Leonardo de Moura
bb9e3ddae2 feat(library/init/meta/interactive): rw [-h] ==> rw [← h] 
@Armael: this change may affect your project.

The file `doc/changes.md` explains the motivation for the change.
 2017-07-05 11:42:55 -07:00
Leonardo de Moura
a76e839e5a chore(tests/lean/keyword_tactics): fix test output 2017-07-05 11:20:10 -07:00
Sebastian Ullrich
8ac1ea6b18 feat(frontends/lean/tactic_notation): ignore by keyword in interactive tactic mode 2017-07-05 11:20:10 -07:00
Sebastian Ullrich
30f4b2f2dd refactor(library): list.taken/dropn ~> list.take/drop 2017-07-05 11:20:10 -07:00
Sebastian Ullrich
c8d6b40991 refactor(frontends/lean/builtin_exprs,library): suppose ~> assume : 2017-07-05 11:20:10 -07:00
Sebastian Ullrich
f024ccd75d refactor(frontends/lean/token_table,library): take ~> assume 2017-07-05 11:20:10 -07:00
Sebastian Ullrich
f95f70fe56 feat(frontends/lean/builtin_exprs): support have ... := ... in term mode 2017-07-05 11:20:10 -07:00
Sebastian Ullrich
2b35a9b1f0 fix(frontends/lean/notation_cmd): notation: default binding power for leading tokens to max 2017-07-05 17:30:38 +02:00
Sebastian Ullrich
ad97607307 fix(frontends/lean/tactic_notation): always use quote_scope for parsing interactive parameters 
Replace now redundant `qexpr` parser with `parser.pexpr`
 2017-07-04 12:20:38 -07:00
Sebastian Ullrich
c3d4c468e6 fix(init/meta/interactive): whnf in assume tactic 2017-07-04 12:20:38 -07:00
Leonardo de Moura
b68fe0d645 chore(tests/lean/interactive): fix test 2017-07-04 11:57:16 -07:00
Leonardo de Moura
dd3616dd16 feat(library/init/meta/interactive): simp_all ==> simp * at * 
cc @Kha
 2017-07-04 11:57:16 -07:00
Leonardo de Moura
44c901bf11 fix(library/init/meta/interactive): make sure all input hypotheses are simplified before we clear the old ones 
The new test exposes the bug.
The bug is similar to the one at `simp [h] at *` described at issue #1675
 2017-07-03 21:58:55 -07:00
Leonardo de Moura
abef98c772 refactor(library/init/meta/simp_tactic): make sure dunfold tactics use name convention used at simp, dsimp, ... 2017-07-03 21:36:17 -07:00
Leonardo de Moura
b86847ec72 fix(library/init/logic): mark eq.substr with [elab_as_eliminator] 
See issue #1718
 2017-07-03 17:27:41 -07:00
Leonardo de Moura
e24f3341d4 feat(library/init/meta/interactive): simp without foo ==> simp [-foo] 
This commit also adds "exception" validation.
A bad "exception" was being silently ignored.
We can also exclude hypotheses. Example: `simp [*, -h]`
 2017-07-03 17:10:46 -07:00
Leonardo de Moura
76799db032 feat(library/init/meta/interactive): simph ==> simp [*] 
This modification was suggested by @kha.

TODO:
- Use `simp [-f]` instead of `simp without f`
- Allow users to remove hypothesis from `*`. Example: `simp [*, -h]`
  for simplify using all hypotheses but `h`.
 2017-07-03 15:14:47 -07:00
Leonardo de Moura
6b3e28d30b feat(library/init/meta/simp_tactic): add option for reducing [reducible] definitions at dsimp, and to_unfold : list name similar to the one in the simp tactic 
This complete addresses the two pending items at 16711fcdba
 2017-07-03 13:28:46 -07:00
Leonardo de Moura
9a41f0f899 fix(library/init/meta/tactic): by_cases tactic 
Before this commit, the `by_cases p` tactic would synthesize
`inst : decidable p` type class resolution, and then use the
`cases` tactic (dependent elimination). This would create
problems since occurrences of `inst` would be replaced with
`decidable.is_true h` in one branch, and `decidable.is_false h` in the
other. Where `h`s (we have two of them, one for each branch) are
fresh hypotheses introduced by the `cases` tactic.
For example, assume we have the term in our goal.

        `@ite p inst A a b`

This term would become

        `@ite p (decidable.is_true h) A a b` (in the first branch where `h : p`)

and
        `@ite p (decidable.is_false h) A a b` (in the second where `h : not p`)

Now, suppose we try to executed the following tactic in the first branch

        `rw [if_pos h]`

it will fail since `if_pos h` is actually `@if_pos p inst h`, and
we will not be able to unify

        `@ite p (decidable.is_true h) A a b =?= @ite p inst ?A ?a ?b`

This commit workarounds this problem by applying cases on
`@decidable.em p inst : p or not p` instead of `inst : decidable p`.
Thus, the term `inst` is not replaced with `decidable.is_true h` and
`decidable.is_false h`.

The new test `tests/lean/run/simp_dif.lean` demonstrates the problem above.
 2017-07-02 21:34:10 -07:00
Leonardo de Moura
16711fcdba feat(library/tactic/dsimplify): new configuration options for dsimp 
TODO for `dsimp`:
- Add an option for reducing [reducible] definitions
- Add (to_unfold : list name) similar to the one in the `simp` tactic
 2017-07-02 18:26:03 -07:00
Leonardo de Moura
df091f5c34 feat(library/init/meta/interactive): simp and unfold can unfold projection applications 
@Armael: we finally can write `simp [proj]` to unfold the `proj`
projection application.

Remark: we still need to add similar support for `dsimp`.
 2017-07-02 16:28:04 -07:00
Leonardo de Moura
76eed7cb41 chore(library/init/meta): add to_unfold parameter to simplify, and remove redundant simp* tactics 
Remark: the `to_unfold` has not been implemented yet.
 2017-07-02 15:26:06 -07:00
Leonardo de Moura
70b27fb2d3 feat(library/init/meta/interactive): unfold is now based on the simp framework 
See issue #1694.

There is an orthogonal issue. `simp` (and consequently `unfold`) cannot be used to
reduce projections (e.g., `has_add.add`). This issue has been
previously raised by @Armael, but it was not addressed yet.
 2017-07-02 11:30:48 -07:00
Leonardo de Moura
bd9f54cfe7 test(tests/lean/run/1675): simp_all and let 2017-07-02 10:15:00 -07:00
Leonardo de Moura
0b36e014e6 chore(tests/lean): fix tests 2017-07-01 21:12:29 -07:00
Leonardo de Moura
7b802392ed fix(library/init/meta/simp_tactic): simp_all should fail if nothing was simplified 2017-07-01 21:06:07 -07:00
Leonardo de Moura
01003b79cc fix(library/init/meta/interactive): simp [...] at * 
closes #1675

After this commit, the following example works as expected.
```
example (p : nat → Prop) (a b : nat) : a = 0 ∧ b = 0 → p (a + b) → p 0 :=
begin
  intros h₁ h₂,
  simp [h₁] at *,
  /- produces the state
     (p : nat → Prop) (a b : nat)
     h₁ : true
     h₂ : p 0
     |- p 0
  -/
  assumption
end
```
as expected.
Remark: the original issue raised by issue #1675 is actually solved by the
`simp_all` tactic.
 2017-07-01 20:50:46 -07:00
Leonardo de Moura
3422c8816e feat(library/init/meta/simp_tactic): improved simp_all tactic 
It now performs self simplification, and the performance is slightly
better. As described at issue #1675, only non dependent propositions
are considered.

@Armael: this tactic may be useful for you
 2017-07-01 20:26:29 -07:00
Leonardo de Moura
4604d7fd5a feat(library/init/meta): allow users to specify tactic for discharging subgoals in the simp tactic family 
@dselsam @Armael: this feature may be useful for you.
The doc/changes.md describes many other new features.
 2017-07-01 15:35:33 -07:00
Leonardo de Moura
7c35fae9e3 refactor(library/init/meta/simp_tactic): merge simplify_core and simplify 2017-07-01 14:13:49 -07:00
Leonardo de Moura
2f2694a343 chore(tests/lean/interactive/info_tactic): fix test output 2017-07-01 13:11:07 -07:00
Sebastian Ullrich
3cdf502c58 fix(frontends/lean/pp): escape keyword-like identifiers 2017-07-01 10:38:15 -07:00
Leonardo de Moura
b05c4e09ed feat(library/init/meta): add memoize field to simp_config and dsimp_config 
We use `memoize := ff` when implementing `conv.interactive.for` and
`conv.interactive.find`.
 2017-07-01 10:37:09 -07:00
Leonardo de Moura
36cc27fa0f feat(library/init/meta/converter/interactive): add for tactic to conv mode 2017-06-30 21:27:17 -07:00
Leonardo de Moura
b1bdc4690f feat(library/init/meta/simp_tactic): cleanup dunfold 
Here are modifications:
- It fails if no definition is unfolded.
  See comment https://github.com/leanprover/lean/issues/1694#issuecomment-310956315
  at issue #1694

- Users can provide configuration parameters.

- `dunfold_occs` was deleted.
 2017-06-30 20:49:20 -07:00
Leonardo de Moura
9504c9cabc feat(library/init/meta/converter): add support for dsimp parameters for conv mode 2017-06-30 17:37:24 -07:00
Leonardo de Moura
52d4189805 feat(library/tactic): add dsimp_config configuration object for the dsimp tactic family 
Now, `dsimp` fails if the goal did not change.
We can use the config object to obtain the previous behavior:
```
dsimp {fail_if_unchaged := ff}
```
See comment https://github.com/leanprover/lean/issues/1694#issuecomment-310956315
at issue #1694
 2017-06-30 17:15:10 -07:00
Leonardo de Moura
19f65b3b8a test(tests/lean/run/conv_tac1): another conv test 2017-06-30 12:49:41 -07:00
Leonardo de Moura
6208934134 feat(library/init/meta/converter/interactive): add support for rw at conv tactical 2017-06-30 12:41:35 -07:00
Leonardo de Moura
f7fe2a775c feat(library/init/meta/rewrite_tactic): improve rewrite tactic 
`rewrite` tactic improvements
- Add support for `auto_param` and `opt_param`
- Order new goals using the same strategies available for `apply`
- Allow user to set configuration object in interactive mode.

@Armael This commit should address the issue you raised about the order
of new goals in the `rewrite` tactic.
See new test tests/lean/run/rw1.lean for examples.
 2017-06-30 12:03:27 -07:00
Leonardo de Moura
e1c76578c1 chore(tests/lean/run, doc/changes): more tests and document new feature 2017-06-29 17:12:04 -07:00
Leonardo de Moura
fe51bebab3 refactor(library/init/meta/converter): new conv monad implementation 2017-06-29 16:37:22 -07:00
Leonardo de Moura
99d55811e4 feat(library/tactic/match_tactic): automatically convert metavariables occurring in patterns into temporary metavariables (i.e., which are considered during matching) 2017-06-29 11:39:18 -07:00
Leonardo de Moura
a7b895525b feat(library/tactic/simp_lemmas): simp lemmas may contain metavariables 
@dselsam `simp` now supports lemmas containing metavariables.
The metavariables are automatically converted into tmp metavars.
The new test contains a few examples.
 2017-06-28 18:17:21 -07:00
Leonardo de Moura
6669ff2132 feat(library/init/meta): add conv interactive mode 
Remark: this is just the first step, we still need to populate the
`conv.interactive` namespace with tactics such as rewrite, simp, etc.
 2017-06-28 16:09:49 -07:00
Leonardo de Moura
adcb95626e feat(frontends/lean/tactic_notation): allow interactive tactics to take itactic arguments from a different tac_class 2017-06-28 14:51:42 -07:00
Leonardo de Moura
0b19ef82e1 feat(frontends/lean/structure_cmd): default parameter for structure/class declarations 
Remark: we support them at inductive declarations.
 2017-06-28 12:20:56 -07:00