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57 commits

Author SHA1 Message Date
Leonardo de Moura
bdea7d420d chore(*): type_context ==> type_context_old 2018-03-05 12:38:24 -08:00
Leonardo de Moura
7762dc381a feat(library/type_context): use context_cache interface 2018-02-21 15:04:20 -08:00
Leonardo de Moura
41cfa1bf63 feat(library/init/meta/tactic): induction tactic returns constructor/param names 2017-12-10 09:46:39 -08:00
Leonardo de Moura
a2f55e5d7b feat(library/tactic/induction_tactic): new name generator for induction and cases tactics 2017-12-05 14:57:36 -08:00
Sebastian Ullrich
ac8de2472e feat(library/tactic/induction_tactic): clear hypothesis before introducing new ones 2017-07-07 10:06:30 -07:00
Leonardo de Moura
603bbe5987 fix(*): gcc 7 linking errors 2017-05-31 16:35:09 -07:00
Leonardo de Moura
b42ae2cf54 fix(library/type_context): fixes #1500 2017-03-31 19:19:44 -07:00
Leonardo de Moura
740d42ea45 fix(library/tactic): we should preserve names when using the revert/do_something/intro idiom 2017-03-11 12:20:39 -08:00
Leonardo de Moura
d50da0feb7 feat(library/tactic/induction_tactic): add support for ginductive in the induction tactic 2017-03-04 14:55:35 -08:00
Leonardo de Moura
b74740648e fix(library/tactic): fixes #1414 2017-03-03 20:50:00 -08:00
Leonardo de Moura
1542cd750f feat(library/tactic/induction_tactic): use drec in the induction tactic 
The new test failed before this change.
 2017-03-01 18:34:24 -08:00
Leonardo de Moura
132a629eb7 fix(library/tactic/induction_tactic): use whnf when inferring C.rec name 2017-03-01 14:29:26 -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
4d41b03168 chore(frontends/lean,library/tactic): remove old tactic_state functions 2017-02-17 15:41:58 +01:00
Leonardo de Moura
707cf45a26 refactor(library/type_context): rename whnf_pred => whnf_head_pred 2017-02-15 20:20:27 -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
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
53667dd602 fix(library): change API and make sure we don't crash when searching for a non existing local decl 
Fixes #1363

After error recovery has been implemented in the elaborator, a few
assumptions made in the type context are not valid anymore since we may
be recovering from errors, and the local and metavariable contexts may
be invalid.

I used the approach used in the class environment.

- find* methods return optional<...>
- get* methods throw exception for unknown elements

Remarks:

I preserved code patterns such as

     optional<local_decl> d = lctx.find_local_decl(...)
     lean_assert(d)

and did not convert them into

     local_decl d = lctx.get_local_decl(...)

Reason: the intention is clear that the local must be defined there.
If it is not we should analyze the problem and decide whether we should
throw an exception or not.

However, I converted code patterns such as

    local_decl d = *lctx.find_local_decl(...)

into

    local_decl d = lctx.get_local_decl(...)

Disclaimer: this change fixes issue #1363, but it may obfuscate other bugs.
 2017-02-07 09:38:19 -08:00
Leonardo de Moura
60d3255577 fix(library/type_context): issue #1258 again 
This is yet another fix.
 2016-12-22 10:51:16 -08:00
Leonardo de Moura
49e296dee2 fix(library/type_context, library/tactic/induction_tactic): fix for issue #1258 was incorrect 
The fix was incorrect because it could produce an invalid local context.
Actually, the regression tests/lean/run/1258.lean was producing an
assertion violation.
 2016-12-21 21:13:29 -08:00
Leonardo de Moura
9d52b6607d feat(library/tactic): use annotated_head_beta_reduce instead of head_beta_reduce in tactics 2016-11-21 15:40:12 -08:00
Daniel Selsam
52f87760d8 feat(src/library/inductive_compiler): support for nested inductive types 2016-09-16 12:50:59 -07:00
Leonardo de Moura
f3d2a9f1e4 feat(library/tactic/induction_tactic): improve error messages 2016-09-06 18:39:42 -07:00
Leonardo de Moura
e8397681a5 fix(library/tactic/induction_tactic): normalize type in the induction tactic 2016-09-04 17:36:26 -07:00
Leonardo de Moura
78f81034c6 feat(library): add helper methods 2016-08-29 08:31:33 -07:00
Leonardo de Moura
b317d4bc58 refactor(library/tactic): add hsubstitution module 2016-08-29 08:19:05 -07:00
Leonardo de Moura
1a675d69fc refactor(library/tactic/induction_tactic,library/tactic/cases_tactic): replace name_map<name> with substitutions at induction_tactic 
This commit also removes dead code from cases_tactic
 2016-08-28 14:09:22 -07:00
Leonardo de Moura
f0f9880ece refactor(library/equations_compiler/elim_match,library/tactic/cases_tactic): 
new design for elim_match

I still need to fix lemma generation, and refactor induction/subst tactics
 2016-08-28 13:15:10 -07:00
Leonardo de Moura
af9114d7c9 refactor(library/tactic/induction_tactic): low level induction tactic for internal use 2016-07-14 16:04:05 -04:00
Leonardo de Moura
b390521b30 feat(library/tactic/induction_tactic): clear major premise 2016-07-07 07:39:25 -07:00
Leonardo de Moura
925d538337 chore(library/tactic/induction_tactic): uniform error messages 2016-07-07 07:39:25 -07:00
Leonardo de Moura
dbbe070060 feat(library/tactic): add 'induction' tactic 2016-07-05 19:13:23 -07:00
Leonardo de Moura
aeee79da2b chore(library): library/tactic => library/old_tactic 2016-06-06 16:38:27 -07:00
Leonardo de Moura
8dde1489f9 refactor(library/util): isolate util procedures that depend on old_type_checker 2016-03-21 13:36:08 -07:00
Leonardo de Moura
29ad781ec2 refactor(kernel): remove converter class 
This abstraction is not useful after refactoring.
 2016-03-19 15:58:15 -07:00
Leonardo de Moura
d8079aa16a refactor(library): create copy of the kernel type_checker in library 
Motivation: it will allow us to simplify the kernel type_checker and
make sure it implements the same API provided by type_context
 2016-03-18 14:34:10 -07:00
Leonardo de Moura
632d4fae36 chore(library): rename local_context to old_local_context 2016-02-11 18:15:16 -08:00
Leonardo de Moura
c9e9fee76a refactor(*): remove name_generator and use simpler mk_fresh_name 2016-02-11 18:05:57 -08:00
Leonardo de Moura
7b29ee1666 fix(library/tactic/induction_tactic): fixes #892 2015-12-10 10:52:57 -08:00
Leonardo de Moura
8b3cbb8fdd fix(library/tactic/induction_tactic): apply substitution to hypothesis type (it may contain metavars) 
closes #876
 2015-12-10 10:11:55 -08:00
Leonardo de Moura
c9ff175cf4 fix(library/tactic/induction_tactic): fixes #893 2015-12-10 10:11:55 -08:00
Leonardo de Moura
6a36bffe4b fix(library/class_instance_resolution): bugs in new type class resolution procedure 2015-11-08 14:04:57 -08:00
Leonardo de Moura
1b864a838f fix(library/tactic/induction_tactic.cpp): condition for checking whether 'induction' tatic is applicable or not 
fixes #690
 2015-06-28 13:07:02 -07:00
Leonardo de Moura
5687c24944 refactor(library/tactic/induction_tactic): cleanup 2015-06-22 10:23:54 -07:00
Leonardo de Moura
d547698a56 refactor(library,library/tactic): move class_instance_synth to library 
This module will be needed by the simplifier
 2015-06-01 16:30:40 -07:00
Leonardo de Moura
ca110012d8 feat(library/tactic): automate "generalize-intro-induction/cases" idiom 
closes #645
 2015-05-30 21:57:28 -07:00
Leonardo de Moura
b83b0c0017 fix(library/tactic/induction_tactic): fixes #619 2015-05-21 18:22:07 -07:00
Leonardo de Moura
2b4233ee8e fix(library/tactic/induction_tactic): exception handling 2015-05-21 10:15:49 -07:00
Leonardo de Moura
d6b72ef4d7 feat(library/tactic/induction_tactic): try available recursors until one works 
closes #615
 2015-05-20 23:23:05 -07:00
Leonardo de Moura
2164ba6f20 fix(library/tactic/induction_tactic): fixes #614 2015-05-20 23:14:11 -07:00