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239 commits

Author SHA1 Message Date
Leonardo de Moura
71685e4dd6 feat(frontends/lean): add support for t.<id> and t.<idx> when t is a composite term 
Replace `^.` with `.` in the stdlib
 2017-03-28 17:47:49 -07:00
Leonardo de Moura
87932f1c56 feat(frontends/lean): change notation for inaccessible patterns 
The following are accepted
 .(t)
 ._

We don't accept .t anymore because it will conflict with the field
access notation.
 2017-03-28 16:09:15 -07:00
Leonardo de Moura
6183c7676e feat(frontends/lean): use . for field access 2017-03-28 15:29:54 -07:00
Leonardo de Moura
494e5b65c5 feat(library/init/meta/tactic): add apply_auto_param and apply_opt_param tactics 
see #1485
 2017-03-27 13:42:08 -07:00
Sebastian Ullrich
c7b47c7b7f fix(system/io): try to fix io monad 2017-03-27 13:42:08 -07:00
Sebastian Ullrich
dfd84666e2 feat(library): add functor, applicative, and monad laws, and prove them correct for non-meta instances 2017-03-27 13:42:08 -07:00
Sebastian Ullrich
3ead6be9ca feat(init): add default value proofs to the monadic hierarchy 2017-03-27 13:42:08 -07:00
Gabriel Ebner
098d6f8f2a refactor(init/meta/tactic): remove report_errors argument from to_expr 2017-03-23 09:03:42 +01:00
Gabriel Ebner
c8fff9f4ff refactor(init/meta/interaction_monad): replace rstep by istep 2017-03-23 09:03:41 +01:00
Daniel Selsam
538ac8d187 feat(inductive_compiler): generate injectivity lemmas 2017-03-10 22:27:18 -08:00
Sebastian Ullrich
763097dbd2 refactor(library): revise the monadic hierarchy 2017-03-09 20:30:03 -08:00
Leonardo de Moura
9d3c0497cb chore(frontends/lean): rename transient commands 
See issue #1432
 2017-03-09 18:41:19 -08:00
Johannes Hölzl
ca0fe37c41 feat(library/init/meta/tactic): add mk_local_pis 2017-03-07 19:30:51 -08:00
Sebastian Ullrich
5d68938a9c feat(frontends/lean): expr literals ```(...) 2017-03-05 08:37:16 -08:00
Leonardo de Moura
525242561a fix(library/init/meta/tactic): use zeta reduction by default in the abstract tactic 
Abstracting let-exprs may produce type errors.
In the future we may consider another strategy for `abstract`.
First, we try to abstract the `let`, then if it fails, we expand.
Not sure if this is a good idea.
 2017-03-02 11:34:28 -08:00
Leonardo de Moura
b1848efbc4 chore(library/init/meta): add head prefix to head reduction tactics, and add zeta tactic (that applies zeta reduction to all subterms) 2017-03-02 10:55:38 -08:00
Leonardo de Moura
04e27eb96f feat(library/init/meta/tactic): add applyc tactic 2017-02-25 12:55:28 -08:00
Leonardo de Moura
35acad642c feat(library/init/meta/tactic): add to_string instance 2017-02-25 12:47:46 -08:00
Leonardo de Moura
921d72b6c4 feat(library/init/meta): add helper tactics 2017-02-24 16:26:47 -08:00
Gabriel Ebner
79afaa7421 feat(library/init/meta/tactic): add timetac combinator 2017-02-24 20:17:19 +01:00
Leonardo de Moura
552a185e6a feat(frontends/lean): 'let' in 'do' blocks 2017-02-24 09:10:36 -08:00
Sebastian Ullrich
a053175714 refactor(init/meta,library/vm): use structure for position information 2017-02-21 11:06:39 -08:00
Leonardo de Moura
1ca5c78cf8 feat(library/tools/mini_crush): improve mini_crush 2017-02-19 18:33:12 -08:00
Leonardo de Moura
2f6f1eb458 feat(library/init): add helper functions 2017-02-18 16:23:15 -08:00
Sebastian Ullrich
b9424975b3 refactor(init/meta): replace dynamically-checked quotes where possible 2017-02-17 19:59:57 -08:00
Leonardo de Moura
a9122a2c0a chore(library/init/meta): use general when 2017-02-17 19:51:40 -08:00
Leonardo de Moura
d3c340a30c feat(library/init/meta): improve induction tactic interface 
It uses .rec recursor when it is not specified
 2017-02-17 10:58:51 -08:00
Sebastian Ullrich
d15591a2d8 feat(library,frontends/lean): expose parser to Lean and use for parsing tactic parameters 2017-02-17 13:45:56 +01:00
Leonardo de Moura
54deb6362d feat(library/init/meta): add helper tactics 2017-02-16 20:49:55 -08:00
Leonardo de Moura
edd5e97045 feat(frontends/lean/elaborator): coercion from (decidable) Prop to bool 
This is a hard coded extra case. It is not an instance of has_coe.
Even if we change has_coe to accomodate this case, it will not be a
satisfactory solution because this coercion depends on the element and
not the type, and the element usually contains metavariables.

We should eventually write a tactic for synthesizing coercions.
 2017-02-14 18:41:32 -08:00
Leonardo de Moura
11d5773560 refactor(library/init/meta): remove whnf_core 2017-02-14 18:39:57 -08:00
Leonardo de Moura
06a7d6d311 refactor(library/init/meta): remove exact_core 2017-02-14 17:43:42 -08:00
Leonardo de Moura
1ab2bb7714 feat(frontends/lean/elaborator): eta-expand function applications until we consume all optional and auto parameters 2017-02-14 17:38:08 -08:00
Leonardo de Moura
1b412b6cc0 feat(library/init/meta): new cases that reverts also composite terms 
The previous `cases` tactic would only use the revert/intro idiom
for `cases h` when `h` is a hypothesis
 2017-02-14 13:30:36 -08:00
Leonardo de Moura
3ced85d399 feat(library/init/meta/tactic): add kdepends_on tactic 2017-02-14 10:33:28 -08:00
Leonardo de Moura
f650a1b873 refactor(library/init/meta): avoid '_core' idiom using default parameters 
I kept a few core methods (e.g., exact_core and apply_core). Reason:
if we use default parameters

    meta constant exact (e : expr) (md := semireducible) : tactic unit

then, we will not be able to write

    to_expr p >>= exact

The workaround is

    do t <- to_expr p, exact t

or
    to_expr p >>= (fun x, exact x)

One alternative is to change how we handle default parameters, and
eta-expand applications that involve default parameters.
We may also have an attribute [eta_expand]. Then

    attribute [eta_expand] foo

instructs the elaborator to automatically eta-expand foo-applications.
The attribute would give users more control, and avoid potential
performance problems. Without the attribute, then for every function
application the elaborator has to check the type and decide whether it
must be eta-expanded or not.

@gebner @kha What do you think?
 2017-02-14 09:46:55 -08:00
Leonardo de Moura
80ac700e36 refactor(library/init): provide more general try_for, and implement tactic.try_for using it 2017-02-12 12:15:19 -08:00
Leonardo de Moura
7112f6d685 feat(library/tactic): add try_for tactic 2017-02-11 20:35:42 -08:00
Leonardo de Moura
41d3d42dee feat(library/init/meta): add helper tactics 2017-02-11 18:30:38 -08:00
Leonardo de Moura
5ca18b8d2e feat(library/init/meta): add helper functions 2017-02-11 16:52:06 -08:00
Leonardo de Moura
2f5159e7eb feat(library/init/meta): add simple tactics for testing where a declaration was defined 2017-02-11 10:57:06 -08:00
Johannes Hölzl
9902a0d4d1 feat(src/library/tactic): apply_core returns list of all generated metavariables 2017-02-10 16:07:33 -08:00
Johannes Hölzl
bb136d63ab feat(src/library/tactic): tactic.cases_core returns for each new goal the used constructor, a list of introduced hypotheses, and substitutions for dependent hypotheses 2017-02-10 16:07:33 -08:00
Johannes Hölzl
d7af5515d2 feat(src/library/tactic): tactic.induction_core returns for each new goal the list of introduced hypotheses and substitutions for dependent hypotheses 
Also add to_obj(buffer<vm_obj>) to construct a vm-list of vm objects.
 2017-02-10 16:07:33 -08:00
Leonardo de Moura
c0e6314f14 fix(library/init/meta,library/tactic/elaborate): bad error position when to_expr is used outside of interactive mode 2017-02-09 18:44:50 -08:00
Leonardo de Moura
5e397795cf fix(library/init/meta): focus tactic 
This commit also add the interactive tactic 'focus'
 2017-02-09 10:02:19 -08:00
Leonardo de Moura
32e6442d0a feat(frontends/lean): no global universes in the frontend 2017-02-08 17:23:04 -08:00
Leonardo de Moura
c5dc8e651a chore(library/init/meta): cleanup 2017-02-08 15:33:25 -08:00
Leonardo de Moura
54f7bf9391 fix(frontends/lean, library/tactic): remove redundant error messages, and fix position of error messages 
Summary:

We minimize the number of "'sorry' used warning messages".  We also
re-target the error to the main declaration. Example: foo._main ==> foo
We do not report for auxiliary declarations such as "_example" and
"foo.equations._eqn_1"

Get rid of the redundant error message "error : failed" for tactics.
We added "silent failures" in the tactic framework.

We do not store line/col information for tactics nested in notation
declarations.  Before this commit, we would have tactics such
as (tactic.save_info line col) nested inside of notation declarations.
 2017-02-07 20:25:28 -08:00
Leonardo de Moura
a28d6a94fd feat(library/init/meta): add any_goals tactic 2017-02-06 16:23:29 -08:00