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Author SHA1 Message Date
Leonardo de Moura
53537d0684 feat(builtin/kernel): 'implication' simplification theorems 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-11 13:35:20 -08:00
Leonardo de Moura
50f281b430 feat(builtin/kernel): add eqf_intro and eqf_elim theorems 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-11 11:13:54 -08:00
Leonardo de Moura
d4a7d796a5 feat(builtin): prove strong induction theorem, add < theorems 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-10 18:46:33 -08:00
Leonardo de Moura
411f14415d feat(builtin): automatically generate Lean/C++ interface for builtin theories 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-09 18:09:53 -08:00
Leonardo de Moura
2179e57db3 refactor(builtin): move if_then_else to its own module 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-09 14:08:39 -08:00
Leonardo de Moura
fdeb457a81 feat(kernel/pos_info_provider): add support for file names in pos_info_provider 
The idea is to include the file name when displaying justification objects.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-09 12:19:30 -08:00
Leonardo de Moura
57c0006916 chore(*): cleanup lean builtin symbols, replace :: with _ 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-09 08:33:52 -08:00
Leonardo de Moura
e42b616438 fix(kernel/normalizer): equality between semantic attachments 
Given a heterogenous equality:  a == b
The normalizer will only reduce it if a and b are objects of the same kind.
Now, 1 == true is not reduced to false anymore.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-08 19:10:30 -08:00
Leonardo de Moura
8e9d88c2cf refactor(builtin/kernel): prove iff::intro, and add a new name for it boolext (Boolean extensionality) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-08 18:31:45 -08:00
Leonardo de Moura
a4b3d6d6c8 refactor(builtin/kernel): prove eta using function extensionality, and rename abst and abstpi to funext and allext 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-08 17:25:14 -08:00
Leonardo de Moura
2b2aa228e3 refactor(builtin/kernel): start with small universes 
The universe constraint manager is more flexible now.
We don't need to start with a huge universe  U >= 512.
We can start small, and increase it on demand.

If module mod1 needs it, it can always add

   universe U >= 3

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-08 12:35:00 -08:00
Leonardo de Moura
85de05e5cf chore(kernel/unification_constraint): update max_constraint comment to reflect its new semantics 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-08 01:09:47 -08:00
Leonardo de Moura
048151487e feat(kernel): use Pi as forall/implication 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-08 00:38:39 -08:00
Leonardo de Moura
d12d0f036f feat(kernel/environment): universe variables now live in their own namespace 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-07 15:57:36 -08:00
Leonardo de Moura
95515ca5df chore(*): fix warnings produced by clang++ 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-07 15:39:49 -08:00
Leonardo de Moura
29db6accb8 test(tests/lean): new tests for exercising the environment object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-07 14:34:21 -08:00
Leonardo de Moura
0a20356a51 fix(kernel/environment): we should not add an universe contraint object to the set of object when an integer overflow occurs 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-07 13:43:22 -08:00
Leonardo de Moura
17c4cce89c fix(library/elaborator): remove_detail procedure was keeping a lot of details when typeof_mvar_justification was being used 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-07 13:24:46 -08:00
Leonardo de Moura
4424a314e0 feat(kernel): add get_universe_distance method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-06 17:13:13 -08:00
Leonardo de Moura
5fe8c32da9 feat(kernel): use new universe contraints in the environment, allow new constraints to be added 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-06 16:46:11 -08:00
Leonardo de Moura
b5a30855f8 feat(kernel/universe_constraints): add new class for managing universe constraints 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-06 15:01:28 -08:00
Leonardo de Moura
8c956280d9 chore(frontends/lean): rename setoption and setopaque commands to set::option and set::opaque 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-06 11:41:03 -08:00
Leonardo de Moura
935c2a03a3 feat(*): change name conventions for Lean builtin libraries 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-05 19:21:44 -08:00
Leonardo de Moura
4ba097a141 feat(frontends/lean): use lowercase commands, replace 'endscope' and 'endnamespace' with 'end' 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-05 13:06:36 -08:00
Leonardo de Moura
9eb4dc4a81 feat(kernel, library/elaborator, frontends/lean): improve how elaborator_exceptions are displayed in the Lean frontend 
This commit affects different modules.
I used the following approach:
1- I store the metavariable environment at unification_failure_justifications. The idea is to capture the set of instantiated metavariables at the time of failure.
2- I added a remove_detail function. It removes propagation steps from the justification tree object. I also remove the backtracking search space associated with higher-order unificiation. I keep only the search related to case-splits due to coercions and overloads.

3- I use the metavariable environment captured at step 1 when pretty printing the justification of an elaborator_exception.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-03 17:18:23 -08:00
Leonardo de Moura
92c7145d7f feat(kernel/expr): maximize sharing before serializing 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-02 20:03:42 -08:00
Leonardo de Moura
9620b00e24 feat(kernel/metavar): is instantiate_metavars, we are also instantiating assigned metavariables that occur in the local context of unassinged ones. 
This modification improves the effectiveness of the process_metavar_inst procedure in the Lean elaborator.

For example, suppose we have the constraint

   ctx |- ?M1[inst:0 ?M2] == a

If ?M1 and ?M2 are unassigned, then we have to consider the two possible solutions:

        ?M1 == a
    or
        ?M1 == #0 and ?M2 == a

On the other hand, if ?M2 is assigned to b, then we can ignore the second case.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-02 16:08:38 -08:00
Leonardo de Moura
ecc5d1bc3a refactor(kernel): move printer to library, cleanup io_state interface 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-02 13:37:50 -08:00
Leonardo de Moura
0592261847 refactor(kernel/io_state): move io_state_stream to library 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-02 13:14:21 -08:00
Leonardo de Moura
b81d3309b9 fix(kernel): remove ios hack 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-02 13:03:25 -08:00
Leonardo de Moura
43909ca66b feat(frontends/lean/pp): pretty print SetOpaque command 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-01 13:16:44 -08:00
Leonardo de Moura
74cae2a154 refactor(library/elaborator): remove hackish rule 
After the recent fixes, the hack in process_metavar is not needed anymore.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-01 10:55:39 -08:00
Leonardo de Moura
cbd1f98365 fix(library/elaborator): bug at method process_metavar_inst, add new test that exposed the bug 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2014-01-01 03:02:41 -08:00
Leonardo de Moura
0d815b8594 refactor(kernel/context): hide that the context is implemented using lists 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-31 19:43:50 -08:00
Leonardo de Moura
1cb7408c46 fix(kernel/normalizer): metavariable reification was incorrect, add tst11 at tests/kernel/normalizer.cpp to expose the bug 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-31 16:24:36 -08:00
Leonardo de Moura
cd3bbb1ebf fix(kernel/builtin): enforcing design decision: semantic attachments are NOT simplifiers, they should do only evaluation 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-31 10:14:17 -08:00
Leonardo de Moura
c485b4bc4c fix(kernel/environment): binary file reader, force the file to be read in binary mode 
We need this flag to be able to read the file on Windows.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 18:20:40 -08:00
Leonardo de Moura
1f6e959139 feat(deserializer): protect against corrupted binary files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 18:05:38 -08:00
Leonardo de Moura
a80fccea93 chore(*): cleanup builtin registration 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 12:19:00 -08:00
Leonardo de Moura
2a2f0b0d89 refactor(kernel/builtin): move helper decl macros to a separate file 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 11:51:30 -08:00
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
72761f14e4 refactor(library/io_state): move to the kernel 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-30 11:20:23 -08:00
Leonardo de Moura
097b10e424 refactor(kernel/builtin): move builtin declarations to basic 
There is a lot to be done. We should do the same for Nat, Int and Real.
We also should cleanup the file builtin.cpp and builtin.h.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 22:00:03 -08:00
Leonardo de Moura
37e8738a5f refactor(kernel/expr): value deserializer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 20:47:14 -08:00
Leonardo de Moura
de77851a00 refactor(util/object_serializer): add methods write_core and read_core that allows to pack information in the byte used to indicate whether an object is already in the cache or not 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 19:59:53 -08:00
Leonardo de Moura
dbd122301a feat(kernel/object): compact object serialization kind ids 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 19:19:24 -08:00
Leonardo de Moura
d0fdc3619b feat(kernel/expr): compress application serialization 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 19:11:57 -08:00
Leonardo de Moura
14c3e11289 refactor(kernel/builtin): emove mk_bin_rop and mk_bin_lop to library 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 15:23:18 -08:00
Leonardo de Moura
92404c511c refactor(kernel/builtin): Bool type does not need to be a semantic attachment 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 15:12:08 -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
1b300d3598 chore(kernel/builtin): remove unnecessary functions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 12:55:51 -08:00
Leonardo de Moura
df3686634d refactor(kernel/builtin): remove unnecessary predicates 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 12:20:29 -08:00
Leonardo de Moura
9fdf2a3f55 feat(kernel): add trust_imported flag, it skips type checking of 'pre-compiled' Lean modules 
"Pre-compiled" .olean files were already type checked. The flag -t instructs to Lean to skip
type checking when importing these files.
TODO: add a check-sum.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-29 03:43:53 -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
5e0b344871 fix(kernel/object): uninitialized variable 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 21:57:56 -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
aee1c6d3f3 feat(kernel): export/import (.olean) binary files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 17:31:35 -08:00
Leonardo de Moura
22bebbf242 feat(kernel/object): serializer for kernel objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 14:39:10 -08:00
Leonardo de Moura
755e8b735f feat(kernel/expr): serializer for kernel expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-28 01:23:21 -08:00
Leonardo de Moura
0ef8ba2939 feat(kernel/level): serializer for level objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-27 23:30:13 -08:00
Leonardo de Moura
8cf65f354b fix(frontends/lean/pp): forall and exists pretty printing when used as constants 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-27 12:50:41 -08:00
Leonardo de Moura
2aa691ccb3 fix(kernel/replace_fn): ignore the cached type in constants 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 21:11:25 -08:00
Leonardo de Moura
1a0f0c1609 feat(kernel/normalizer): let normalizer ignore 'undefined' constants 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 20:54:15 -08:00
Leonardo de Moura
6cc57cc4b5 fix(library/tactic/apply_tactic): bug in apply_tac 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-24 15:54:56 -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
Soonho Kong
de018220e1 feat(*): use std::make_shared to create shared_ptr 2013-12-24 14:32:50 -05:00
Leonardo de Moura
b83b17d3ab fix(kernel/metavar): bug at cached_metavar_env::update method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-23 15:41:02 -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
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
90dbdaec40 feat(kernel/expr): cache is_arrow result 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 13:59:45 -08:00
Leonardo de Moura
1faf42e2e1 chore(kernel/expr): remove unnecessary #if-#then-#else 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 13:36:41 -08:00
Leonardo de Moura
7b0b363b32 fix(kernel/normalizer): metavariable reification 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-21 06:40:26 -08:00
Leonardo de Moura
84df182beb refactor(kernel/instantiate): remove hackish (dead) function 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 14:37:05 -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
026f666526 feat(kernel/type_checker): use expression before normalization in the unification constraints generated by the typechecker 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 11:22:13 -08:00
Leonardo de Moura
4838c055b8 feat(kernel/environment): add set_opaque method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-20 10:45:44 -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
6cc83dbe2a fix(kernel/kernel_exception): incorrect pp method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-19 14:46:22 -08:00
Leonardo de Moura
47c7bb1bde refactor(*): uses aliases for unordered_map and unordered_set 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 12:30:45 -08:00
Leonardo de Moura
1e4fa76a47 feat(util/name_map): add template alias 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 11:34:40 -08:00
Leonardo de Moura
7b2fea3fab fix(kernel/normalizer): compilation problem with clang++ 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-18 08:46:36 -08:00
Leonardo de Moura
418623b874 feat(kernel/replace_fn): add template replace that captures commonly used pattern 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 18:31:59 -08:00
Leonardo de Moura
23e518001a feat(kernel/normalizer): avoid unnecessary creation of closures for n-ary functions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 18:10:13 -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
af4a6c9364 fix(kernel/normalizer): cache problems 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 14:52:14 -08:00
Leonardo de Moura
33789fad4c fix(kernel/builtin): make sure the if-then-else semantic attachment is not a simplifier 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 14:34:40 -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
836357c65c fix(kernel/normalizer): bug in Let normalization 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 12:35:25 -08:00
Leonardo de Moura
84bfe2a222 fix(library/elaborator): bug in process_meta_app 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-17 10:56:20 -08:00
Leonardo de Moura
f09fd0fc04 feat(kernel/printer): include de Bruijn index in the debug printer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-16 16:56:46 -08:00
Leonardo de Moura
af42078205 fix(kernel): incorrect use of scoped_map 
This commit also adds a new test that exposes the problem.
The scoped_map should not be used for caching values in the normalizer and type_checker. When we extend the context, the meaning of all variables is modified (we are essentially performing a lift). So, the values stored in the cache are not correct in the new context.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-16 15:11:39 -08:00
Leonardo de Moura
02ee31b786 feat(kernel/normalizer): provide the metavar_env to instantiate and add_inst in the normalizer, it will minimize the number of local_entries needed 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-14 15:41:50 -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
51aee83b70 refactor(kernel/metavar_env): use the same approach used in the class environment in the class metavar_env 
This modification was motivated by a bug exposed by tst17 at tests/kernel/type_checker.
metavar_env is now a smart point to metavar_env_cell.
ro_metavar_env is a read-only smart pointer. It is useful to make sure we are using proof_state correctly.

example showing that the approach for caching metavar_env is broken in the type_checker

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-13 18:59:15 -08:00
Leonardo de Moura
2e5e5e187f chore(util/rc): remove unnecessary argument from LEAN_COPY_REF and LEAN_MOVE_REF macros 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-13 15:01:24 -08:00
Leonardo de Moura
fa8b984e27 fix(kernel/environment): compilation warnings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-13 13:54:45 -08:00
Leonardo de Moura
ae52c8062e chore(kernel/metavar): remove unused function 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 17:39:14 -08:00
Leonardo de Moura
450d6a4b1e refactor(util/splay_tree): replace find with splay_find 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 17:27:30 -08:00
Leonardo de Moura
f97c260b0b refactor(kernel/environment): add ro_environment 
The environment object is a "smart-pointer".
Before this commit, the use of "const &" for environment objects was broken.
For example, suppose we have a function f that should not modify the input environment.
Before this commit, its signature would be
       void f(environment const & env)
This is broken, f's implementation can easilty convert it to a read-write pointer by using
the copy constructor.
       environment rw_env(env);
Now, f can use rw_env to update env.

To fix this issue, we now have ro_environment. It is a shared *const* pointer.
We can convert an environment into a ro_environment, but not the other way around.

ro_environment can also be seen as a form of documentation.
For example, now it is clear that type_inferer is not updating the environment, since its constructor takes a ro_environment.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 16:48:34 -08:00
Leonardo de Moura
7b2cbd6926 chore(kernel/environment): remove implementation hack 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 16:48:34 -08:00
Leonardo de Moura
3457fe5935 chore(kernel): rename read_only_environment and read_write_environment 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 16:48:33 -08:00
Leonardo de Moura
1852c86948 feat(kernel): improve instantiate and lift_free_vars (use metavar_env to minimize the number of lift and inst local_entries needed) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 16:48:33 -08:00
Leonardo de Moura
058bdb88ac feat(kernel/context): add operator== for contexts, and new constructor 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 16:48:33 -08:00
Leonardo de Moura
38a25a1bd2 feat(kernel/metavar): (re-)enable add_lift simplification 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-12 16:48:33 -08:00
Leonardo de Moura
98f5ce0512 fix(kernel/context): unused var warning in release mode 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-11 21:24:05 -08:00
Leonardo de Moura
3e77dd0c42 fix(kernel/context): make context remove more robust 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-11 19:51:57 -08:00
Leonardo de Moura
c29b155fdd feat(library/elaborator): use improved has_free_vars in the elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-11 16:15:20 -08:00
Leonardo de Moura
0e2b7973cf feat(kernel/free_vars): improve has_free_vars function, it produces better results for expressions containing metavariables 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-11 16:09:33 -08:00
Leonardo de Moura
af1b0d2e81 feat(library): add function free_var_range for computing the range [0, R) of free variables occurring in an expression 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-11 15:32:50 -08:00
Leonardo de Moura
55389cf6e5 feat(kernel/context): add find, a version of lookup that does not throw an exception 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-11 09:54:54 -08:00
Leonardo de Moura
4de5f06a97 fix(library/elaborator): bug in process_metavar_inst, and disable simplification that is negatively impacting the elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-10 19:26:58 -08:00
Leonardo de Moura
8f2fe273ea refactor(*): isolate std::thread dependency 
This commit allows us to build Lean without the pthread dependency.
It is also useful if we want to implement multi-threading on top of Boost.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-09 15:20:26 -08:00
Leonardo de Moura
25a2f5f7e0 fix(kernel/formatter): clang++ errors and warnings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 18:54:04 -08:00
Leonardo de Moura
445d4f6793 refactor(kernel/unification_constraint): remove 'null' unification_constraint and its operator bool 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 18:11:35 -08:00
Leonardo de Moura
340d643d89 fix(library/kernel_bindings): make sure that when a formatter is invoked and it has a reference to an environment object, we get a read-only lock to the environment object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 16:55:55 -08:00
Leonardo de Moura
759fcb7b4f refactor(kernel/formatter): hide 'unsafe' constructor 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 15:39:26 -08:00
Leonardo de Moura
a4afdfeace refactor(kernel/expr): remove the dangerous expr::release method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 14:45:18 -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
2f88d6710c feat(kernel/expr): add some_expr and none_expr for building values of type optional<expr> 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 10:34:38 -08:00
Leonardo de Moura
25b812f1c9 feat(kernel/expr): no overhead optional<expr> template specialization 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-08 10:17:29 -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
b6b520302d feat(kernel/replace_visitor): relax replace_visitor contract, the input expression can be null 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-07 15:35:26 -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
195ea24d71 refactor(kernel/type_checker): pass buffer<unification_constraint> as a pointer 
The idea is to make it an optional parameter independent of metavar_env.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-07 10:27:11 -08:00
Leonardo de Moura
872434e632 fix(kernel/has_free_vars): return false for null expression 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 16:01:57 -08:00
Leonardo de Moura
147626c906 fix(kernel/printer): memory access violation when printing contexts 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 15:50:29 -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
d79a626523 fix(kernel/type_checker): Pi with metavariables case 
The type checker (and type inferer) were not handling correctly Pi expressions where the type universe cannot be established due to the occurrence of metavariables. In this case, a max-constraint is created. The problem is that the domain and body of the Pi are in different contexts. The constrain generated before this commit was incorrect, it could contain a free variable. This commit fix the issue by using the context of the body, and lifting the free variables in the domain by 1.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 13:07:59 -08:00
Leonardo de Moura
c841763a05 feat(library/elaborator): add special treatment for constraints of the form ?m[inst:i v] << t, where t is a proposition 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-06 04:51:07 -08:00
Leonardo de Moura
c1afefb873 feat(library/fo_unify): unify heterogeneous - homogeneous equality 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 19:00:31 -08:00
Leonardo de Moura
873a07d34c feat(kernel/replace_visitor): check interrupted flag and stackoverflow 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-05 05:42:12 -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
bcc8b67592 chore(*): consistent file name convention 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-03 12:40:52 -08:00
Leonardo de Moura
f80106a895 chore(*): use 'explicit operator bool' everywhere. 
operator bool() may produce unwanted conversions.
For example, we had the following bug in the code base.

...
   object const & obj = find_object(const_name(n));
   if (obj && obj.is_builtin() && obj.get_name() == n)
...

obj.get_name() has type lean::name
n              has type lean::expr

Both have 'operator bool()', then the compiler uses the operator to
convert them to Boolean, and then compare the result.
Of course, this is not our intention.

After this commit, the compiler correctly signs the error.
The correct code is

...
   object const & obj = find_object(const_name(n));
   if (obj && obj.is_builtin() && obj.get_name() == const_name(n))
...

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-02 23:02:45 -08:00
Leonardo de Moura
74dfdd02de feat(util): add primitives for checking the amount of available stack space 
Recursive functions that may go very deep should invoke the function check_stack. It throws an exception if the amount of stack space is limited.

The function check_system() is syntax sugar for
    check_interrupted();
    check_stack();

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-12-01 17:19:27 -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
a9eb2a9307 feat(kernel/builtin): add is_* functions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-29 11:35:58 -08:00
Leonardo de Moura
dae86c2ffa feat(frontends/lean/parser): add basic tactic support in the frontend 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-28 21:08:12 -08:00
Leonardo de Moura
3a93212d5e chore(kernel/expr): fix cpplint warning 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-27 12:59:16 -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
956f203a55 refactor(bindings/lua): move Lua bindings to the file associated with them 
The directory bindings/lua was getting too big and had too many dependencies.
Moreover, it was getting too painful to edit/maintain two different places.
Now, the bindings for module X are in the directory that defines X.
For example, the bindings for util/name.cpp are located at util/name.cpp.

The only exception is the kernel. We do not want to inflate the kernel
with Lua bindings. The bindings for the kernel classes are located
at bindings/kernel_bindings.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-26 19:15:56 -08:00
Leonardo de Moura
b41789d085 feat(kernel): add is_bool predicate 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-26 11:34:50 -08:00
Leonardo de Moura
28a56e3acf fix(kernel/expr_eq): the cached type should ignored when comparing expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
63bbf07f64 feat(library/tactic): add 'idtac' tactic and 'then' tactical 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-21 17:29:06 -08:00
Leonardo de Moura
be8fe1b902 fix(kernel/replace): make it more robust, and add clear method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-20 13:19:21 -08:00
Leonardo de Moura
6989f1f9ba refactor(kernel/metavar): remove unnecessary variable 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-19 14:41:54 -08:00
Leonardo de Moura
0126fa0499 refactor(kernel): add find_fn, replace for_each_fn with find_fn when appropriate, remove unnecessary function has_cached_type 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-19 13:03:46 -08:00
Leonardo de Moura
5cfcb7e144 chore(kernel/for_each): use consistent naming convetions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-19 11:24:02 -08:00
Leonardo de Moura
7f088b7635 feat(kernel): add (optional) field m_type to expr_const, this field is useful for implementing the tactic framework 
This field should not be visible in the external API.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-19 11:21:52 -08:00
Leonardo de Moura
57bf4f3e67 feat(kernel/expr): avoid recursion when deleting expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-18 18:41:08 -08:00
Leonardo de Moura
2951c92ad1 feat(kernel/for_each): avoid recursion at for_each template 
It saves a lot of stack space.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-18 18:08:31 -08:00
Leonardo de Moura
e0c23e5984 fix(kernel/environment): compilation problem on Windows 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-18 09:52:47 -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
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
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
4ebb3c572a feat(kernel/environment): make the environment throw an exception when weak-ref has expired 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-16 18:35:17 -08:00
Leonardo de Moura
516c5c8fea feat(lua): add metavar_env objects to Lua API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-16 14:44:33 -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
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
ad1180c5b4 fix(kernel/occurs): typos 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 17:04:56 -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
ba0889265e refactor(lua): cleanup Lua bindings 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-13 13:55:05 -08:00
Leonardo de Moura
c4c548dc5d feat(*): simplify interrupt propagation 
Instead of having m_interrupted flags in several components. We use a thread_local global variable.
The new approach is much simpler to get right since there is no risk of "forgetting" to propagate
the set_interrupt method to sub-components.

The plan is to support set_interrupt methods and m_interrupted flags only in tactic objects.
We need to support them in tactics and tacticals because we want to implement combinators/tacticals such as (try_for T M) that fails if tactic T does not finish in M ms.
For example, consider the tactic:

    try-for (T1 ORELSE T2) 5

It tries the tactic (T1 ORELSE T2) for 5ms.
Thus, if T1 does not finish after 5ms an interrupt request is sent, and T1 is interrupted.
Now, if you do not have a m_interrupted flag marking each tactic, the ORELSE combinator will try T2.
The set_interrupt method for ORELSE tactical should turn on the m_interrupted flag.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-12 21:45:48 -08:00
Leonardo de Moura
ac6c18321a fix(lua): make sure environment objects can be safely accessed/updated from current threads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 20:29:53 -08:00
Leonardo de Moura
31abc00db8 chore(*): add LCOV_EXCL_LINE to lean_unreachable statements 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-11 09:19:38 -08:00
Leonardo de Moura
7683188ab0 chore(emplace_back): use emplace_back when appropriate 
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
ff16ffaea3 fix(kernel/environment): warning produced by clang 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 11:36:08 -08:00
Leonardo de Moura
8012c4f644 fix(kernel/environment): add weak reference to environment objects 
We need weak references to environment objects because the environment has a reference to the type_checker and the type_checker has a reference back to the environment. Before, we were breaking the cycle using an "environment const &". This was a dangerous hack because the environment smart pointer passed to the type_checker could be on the stack. The weak_ref is much safer.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-07 11:29:08 -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
80e23f98c7 feat(kernel/environment): add environment extension objects, the environment can be extended with frontend specific objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-11-06 19:22:30 -08:00
Soonho Kong
044813615e fix: add '#include <tuple>' 2013-11-03 13:00:42 -05:00
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
7fc87faa8f feat(kernel): heterogeneous transitivity axiom, we need this axiom to be able to generate modular proofs in the rewriting engine module 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 17:07:30 -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
521fa1ddb8 style(kernel/metavar): add missing includes 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-29 03:00:43 -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
92f5a31976 feat(kernel/expr): add new mk_app template for creating applications using a collection 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-27 08:53:58 -07:00
Leonardo de Moura
eaccdcb558 refactor(assumption_justification): move to the kernel 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-26 14:21:29 -07:00
Leonardo de Moura
4bed9f85b0 feat(kernel/for_each): add option for disabling cache of atomic expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 15:25:17 -07:00
Leonardo de Moura
ce10bfeaf6 perf(kernel/metavar): improve performance of has_assigned_metavar by avoiding for_each+exception 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 15:19:59 -07:00
Leonardo de Moura
57d9d23bd4 feat(kernel/for_each): allow function F to interrupt for_each search 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 14:58:02 -07:00
Leonardo de Moura
2dd44bdf1a perf(kernel/for_each): delay initialization of visited set 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 14:52:08 -07:00
Leonardo de Moura
c3c66b6c90 feat(make): add THREAD_SAFE build option 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 11:50:35 -07:00
Leonardo de Moura
471bbd4040 refactor(kernel/metavar): combine several splay_trees (at metavar_env) into a single one 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 11:02:19 -07:00
Leonardo de Moura
5e34f410b3 refactor(splay_map): modify splay_find signature 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 10:47:15 -07:00
Leonardo de Moura
5812dfcf44 perf(kernel/justification): remove cache from depends_on 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 10:26:05 -07:00
Leonardo de Moura
2b5c951de3 perf(name): add quick_cmp for hierarchical names 
It first compare names using hash codes.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 09:58:06 -07:00
Leonardo de Moura
66f4834dbc perf(kernel/metavar): add quick test that catches many cases 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 09:24:01 -07:00
Leonardo de Moura
f38178311c perf(kernel/expr_eq): delay hashtable initialization 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 09:21:47 -07:00
Leonardo de Moura
412bc792c9 fix(style): missing include 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 08:10:28 -07:00
Leonardo de Moura
0c21f45292 fix(kernel/unification_constraint): memory leak 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-25 08:06:21 -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
ca6a6d71e5 fix(kernel/printer): bug when printing let expression 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 18:05:23 -07:00
Leonardo de Moura
872b698bc3 feat(elaborator): add option m_assume_injectivity for getting more concise solutions 
We may miss solutions, but the solutions found are much more readable.
For example, without this option, for elaboration problem

Theorem Example4 (a b c d e : N) (H: (a = b ∧ b = e ∧ b = c) ∨ (a = d ∧ d = c)) : (h a c) = (h c a) :=
    DisjCases H
              (fun H1 : _,
                   let AeqC := Trans (Conjunct1 H1) (Conjunct2 (Conjunct2 H1))
                   in CongrH AeqC (Symm AeqC))
              (fun H1 : _,
                   let AeqC := Trans (Conjunct1 H1) (Conjunct2 H1)
                   in CongrH AeqC (Symm AeqC))

the elaborator generates

Theorem Example4 (a b c d e : N) (H : a = b ∧ b = e ∧ b = c ∨ a = d ∧ d = c) : (h a c) = (h c a) :=
    DisjCases
        H
        (λ H1 : if
               Bool
               (if Bool (a = b) (if Bool (if Bool (if Bool (b = e) (if Bool (b = c) ⊥ ⊤) ⊤) ⊥ ⊤) ⊥ ⊤) ⊤)
               ⊥
               ⊤,
           let AeqC := Trans (Conjunct1 H1) (Conjunct2 (Conjunct2 H1)) in CongrH AeqC (Symm AeqC))
        (λ H1 : if Bool (if Bool (a = d) (if Bool (d = c) ⊥ ⊤) ⊤) ⊥ ⊤,
           let AeqC := Trans (Conjunct1 H1) (Conjunct2 H1) in CongrH AeqC (Symm AeqC))

The solution is correct, but it is not very readable. The problem is that the elaborator expands the definitions of \/ and /\.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 16:47:50 -07:00
Leonardo de Moura
bbc265ded4 feat(frontends/lean): hook new elaborator in the default frontend 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-24 15:14:29 -07:00
Leonardo de Moura
434c33f225 feat(metavar): automatically apply beta-reduction when instantiating metavariable applications (i.e., expressions of the form (?m a)), when the metavariable is a lambda 
This feature is useful for problems that require higher-order matching and/or unification.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 16:35:50 -07:00
Leonardo de Moura
873e56844a refactor(beta_reduction): add function apply_beta 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 16:03:52 -07:00
Leonardo de Moura
f1e0d6ec29 refactor(beta_reduction): move beta reduction functions to the kernel, delete reduce.cpp file and tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 15:44:26 -07:00
Leonardo de Moura
c1e451151a feat(replace_visitor): add an abstract class for applying transformations on expressions 
I also removed replace_using_ctx since it is subsumed by the new class.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 15:01:37 -07:00
Leonardo de Moura
13531b7d3e refactor(kernel): rename trace to justification 
Motivations:

- We have been writing several comments of the form "... trace/justification..." and "this trace object justify ...".
- Avoid confusion with util/trace.h

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 13:42:17 -07:00
Leonardo de Moura
17b48010b7 fix(unification_constraint): fix printer for max constraints 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 12:00:29 -07:00
Leonardo de Moura
274b11530f feat(metavar): improve apply_local_context 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 11:59:36 -07:00
Leonardo de Moura
b57f492e2d fix(kernel/printer): improve printer for Type expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-23 11:58:49 -07:00
Leonardo de Moura
891d22b3de feat(kernel/context): add method for remove context entries at positions [s, s+n). 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 15:52:24 -07:00
Leonardo de Moura
874f67c605 feat(normalizer): remove normalization rule t == t ==> true 
This normalization rule is not really a computational rule.
It is essentially encoding the reflexivity axiom as computation.
It can also be abaused. For example, with this rule,
the following definition is valid:

Theorem Th : a = a := Refl b

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 14:02:48 -07:00
Leonardo de Moura
c3e87f106f fix(kernel/trace): fix typo in depends_on 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:37 -07:00
Leonardo de Moura
183f5a1ccf feat(elaborator): solve unification constraints 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
a1710aeeb9 feat(elaborator): add trace objects for elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
dc0e7a4472 feat(pos_info_provider): add position information provider for expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
8663ac550f feat(kernel/trace): add function depends_on for trace objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
b1b49e86e7 test(elaborator): add simple test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
1548ffabb1 feat(elaborator): add new elaborator interface 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
827c65b5e9 feat(kernel): add static_assert for update_metavar 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
61ccaf741c fix(frontend/lean): minor modification to be able to execute lean frontend while refactoring elaborator 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
7cf83800c0 refactor(metavar): implement metavar_env, and use unification_constraint and trace objects in the type_checker, light_checker 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
1f0eab7a14 test(type_checker): add new tests for type_checker trace objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
fc288929a2 feat(type_checker): add trace objects to justify constraints created by the type checker 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
5b1b03bafd refactor(is_convertible): move from normalizer to type_checker class 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
85bfa45e6a refactor(kernel_exception): delete kernel_exception_formatter, and implement kernel_exception pretty printer as a virtual method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
d843d432d3 refactor(kernel): move printer and formatter objects to the kernel 
The printer and formatter objects are not trusted code.
We moved them to the kernel to be able to provide them as an argument to the trace objects.
Another motivation is to eliminate the kernel_exception_formatter hack.
With the formatter in the kernel, we can implement the pretty printer for kernel exceptions as a virtual method.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
ddb90d3038 feat(kernel): add unification_constraint and trace objects to the kernel 
Trace objects will be used to justify steps performed by engines such as the elaborator. We use them to implement non-chronological backtracking in the elaborator. They are also use to justify to the user why something did not work.

The unification constraints are in the kernel because the type checker may create them when type checking a term containing metavariables.

Remark: a minimalistic kernel does not need to include metavariables, unification constraints, nor trace objects. We include these objects in our kernel to minimize code duplication.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
59914a36f3 refactor(metavar): reorganize and simplify metavariables 
- Use hierarchical names instead of unsigned integers to identify metavariables.
- Associate type with metavariable.
- Replace metavar_env with substitution.
- Rename meta_ctx --> local_ctx
- Rename meta_entry --> local_entry
- Disable old elaborator
- Rename unification_problems to unification_constraints
- Add metavar_generator
- Fix metavar unit tests
- Modify type checker to use metavar_generator
- Fix placeholder module

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-22 08:15:36 -07:00
Leonardo de Moura
0783805671 feat(kernel): add weight to kernel definitions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-15 14:50:08 -07:00
Leonardo de Moura
aa5be3262f fix(type_checker): fix inconsistent cache bug in type_checker, add tests that expose the problem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-10-01 19:23:55 -07:00
Soonho Kong
e3b762e909 feat(kernel): add static_assert to expr,expr_eq,replace 2013-10-01 16:47:36 -07:00
Soonho Kong
a832173f5f feat(kernel/expr): add expr::operator() which takes 8 args 2013-10-01 00:19:30 -07:00
Leonardo de Moura
e5d312dc18 fix(kernel): the hash code of expressions was not being used to compare them 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-26 08:41:20 -07:00
Leonardo de Moura
98b4e09063 refactor(kernel): simplify expr_eq 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-25 22:09:08 -07:00
Leonardo de Moura
6477708d78 refactor(debug): improve lean_unreachable(), now we can avoid 'fake' return statements 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-25 21:27:20 -07:00
Leonardo de Moura
9f0dab1add fix(kernel): add declarations for operator<<(std::ostream&, expr const&) and operator<<(std::ostream&, context const&) in the kernel 
The actual implementation of these two operators is outside of the
kernel. They are implemented in the file 'library/printer.cpp'.
We declare them in the kernel to prevent the following problem.
Suppose there is a file 'foo.cpp' that does not include
'library/printer.h', but contains

    expr a;
    ...
    std::cout << a << "\n";
    ...

The compiler does not generate an error message. It silently uses the
operator bool() to coerce the expression into a Boolean. This produces
counter-intuitive behavior, and may confuse developers.
 2013-09-25 17:45:54 -07:00
Leonardo de Moura
ba0528c298 Implement total order on expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-24 12:16:32 -07:00
Leonardo de Moura
46d6c41835 Fix bug in the type checker (when type checking terms with meta-variables). 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-22 19:12:19 -07:00
Leonardo de Moura
1647e44510 Fix memory corruption bug 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-22 18:53:58 -07:00
Leonardo de Moura
16a6a54df1 Fix abuse of operator-> overload 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-22 16:41:51 -07:00
Leonardo de Moura
c847d27763 Improve higher order unification 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-21 00:41:49 -07:00
Leonardo de Moura
651c5d6751 Fix warnings and bugs related to unused variables. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-19 22:41:07 -07:00
Soonho Kong
ab6ca82e6f Update to suppress unused-parameter warnings 2013-09-19 22:40:34 -07:00
Leonardo de Moura
80a1b96925 Remove duplicate solutions in the higher order matching module. Simplify solutions when higher-order matching is used, and we don't have a residue. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-19 18:59:28 -07:00
Leonardo de Moura
2f29ff70d7 Implement higher-order unification 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-18 20:46:00 -07:00
Leonardo de Moura
ad901ce087 Use consistent naming conventions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 14:43:07 -07:00
Leonardo de Moura
3df6149daa Add support for metavariables in the type checker. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 11:09:59 -07:00
Leonardo de Moura
9f9dcf9a29 Fix bug in the creation of children environments. Remove unnecessary function. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 07:37:33 -07:00
Leonardo de Moura
30b19c314a Add basic support for metavariables at is_convertible. Swap is_convertible arguments to make it more intuitive. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 07:15:47 -07:00
Leonardo de Moura
a26c7d47f2 Add simplification to add_lift 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 03:14:02 -07:00
Leonardo de Moura
99e8d2feae Add simplification rule to add_inst 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 02:57:28 -07:00
Leonardo de Moura
21c7a45f67 Relax definition of identity_stack. Fix printer for metavariable contexts. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 02:09:45 -07:00
Leonardo de Moura
d3bce584f4 Add support for new metavariable representation in the normalizer. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-17 01:57:21 -07:00
Leonardo de Moura
da09e7217a Cleanup meta_entry code 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-16 19:32:28 -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
cad562a448 Add support for metavariables in the normalizer. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-16 19:32:28 -07:00
Leonardo de Moura
1be2a30c8c Fix bug in normalizer. We must create a scope whenever we extend the value stack. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-16 19:32:28 -07:00
Leonardo de Moura
f79f046294 Add partial support for metavariables in the normalizer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-15 21:23:50 -07:00
Leonardo de Moura
2800292947 Add timestamp to metavar_env 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-15 19:50:48 -07:00
Leonardo de Moura
5a4bc331d2 Make unification_problems a virtual class. Associate a 'standard' context with each metavariable in metavar_env 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-15 19:38:36 -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
Soonho Kong
bc60b47295 Apply coding style 2013-09-13 18:48:09 -07:00
Leonardo de Moura
bcc3827a99 Modify Doxygen file to extract all elements even the undocumented ones. Disable warnings for undocumented entities. Add extra comments. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-13 13:46:22 -07:00
Leonardo de Moura
d54834279e Use consistent coding style for if-then-else 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-13 12:57:40 -07:00
Leonardo de Moura
8c735f1daa Use consistent coding style for spaces after ',' 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-13 12:49:03 -07:00
Leonardo de Moura
2c68117adf Tag TODOs 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-13 12:25:21 -07:00
Leonardo de Moura
0c09e4524a Use consistent names for import functions, and library files. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-13 08:58:34 -07:00
Soonho Kong
5c3866cd71 Use fullpath in #include directives, add missing STL headers 2013-09-13 03:35:29 -07:00
Leonardo de Moura
26097475fd Use fullpath in #include directives. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-12 20:04:10 -07:00
Leonardo de Moura
572c7ced2a Add #include<atomic> to expr.h. We need it when #define LEAN_THREAD_UNSAFE_REF_COUNT is used 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-11 19:48:55 -07:00
Leonardo de Moura
33c4b44b2b Encapsulate context implementation. The current implementantion based on lists may be a performance problem in the future, and we should be able to change it without affecting the whole code base. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-07 11:15:11 -07:00
Leonardo de Moura
bab11b57ad Move Symm and Trans back to basic_thms.cpp 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 23:49:35 -07:00
Leonardo de Moura
c674bb3790 Add castlib as an independent library 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 23:40:47 -07:00
Leonardo de Moura
7a9d53d0d7 Refactor arith libraries 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-06 23:19:47 -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
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
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
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
d41160f8a5 Modify environment. Now, when a builtin value is declared, if it has a unicode alternative representation, then we add it as a definition. Now, everything that occurs in the environment has been 'declared'. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-04 08:53:00 -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
887f696f66 Factor duplicate code. Add more comments 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-03 23:27:58 -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
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
b483d0dc45 Replace Int::sub and Real::sub with definitions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 16:31:30 -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
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
7acf438bf4 Metavariables will not be part of the kernel 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 09:36:04 -07:00
Leonardo de Moura
990f428a81 Remove virtual method kind from value class and subclasses. We can use dynamic_cast to achieve the same goal 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 09:35:10 -07:00
Leonardo de Moura
81d0203ee0 Replace macros TypeM, TypeU, Int, Bool, True and False with constant global expressions. The macros were producing counterintuitive behavior. For example, we had an enumeration type with an element called Int. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 09:11:53 -07:00
Leonardo de Moura
db88920f81 Rename normalize and type_check to normalizer and type_checker (using a consistent naming convention) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-09-02 08:43:38 -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
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
4a28a64685 Fix type checker for let expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-31 14:19:24 -07:00
Leonardo de Moura
4ef4655183 Add homogeneous equality 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-30 14:26:12 -07:00
Leonardo de Moura
682df7699d Fix is_convertible propositions => type 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-30 01:24:06 -07:00
Leonardo de Moura
01e4b4b7fe Add postprocessor functional object to the replace_fn template. Add unit-test that demonstrates how to build a replacer that builds a trace. The trace associates new expressions with the old ones that were used to create it. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-28 10:47:19 -07:00
Leonardo de Moura
7003f85213 Add implicit argument management to lean frontend. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-26 10:16:29 -07:00
Leonardo de Moura
25e47a8a2f Add check_interrupted 'macro' 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-25 11:03:09 -07:00
Leonardo de Moura
dc91a7adb8 Add Ctrl-C support for interrupting Lean shell. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-24 16:11:35 -07:00
Leonardo de Moura
f0edf2b4a3 Pretty print kernel exceptions. Improve default lean frontend error messages. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-24 13:16:43 -07:00
Leonardo de Moura
18a195029b Refactor expression equality 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-23 09:42:49 -07:00
Leonardo de Moura
670dc5ad55 Add option to control maximum recursion depth in the expression normalizer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

Conflicts:
	src/tests/kernel/normalize.cpp
 2013-08-23 09:42:49 -07:00
Leonardo de Moura
198fd46fc2 Track recursion depth at normalizer. Add fluid let template. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-23 09:42:49 -07:00
Leonardo de Moura
218b6ac8b7 Fix typo 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-23 09:42:49 -07:00
Leonardo de Moura
ce470f57db Add set options to lean_parser. Add support for disabling unicode output. Use channels in lean_parser. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-21 12:42:55 -07:00
Leonardo de Moura
6f36611010 Fix clang++ error 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-20 20:16:02 -07:00
Leonardo de Moura
b2ba0618c9 Use normalizer object in type checker. The idea is to make sure the interruption is propagated to normalizer. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-19 20:05:56 -07:00
Leonardo de Moura
88cc3dc20d Add interrupt to normalizer. Fix tests (they were not using the basic printer). 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-19 20:05:56 -07:00
Leonardo de Moura
b964edfb3e Add interrupt method to type checker. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-19 20:05:56 -07:00
Leonardo de Moura
ce43c1cbae Fix cup symbol. In Emacs, the unicode characters cup and cap are assigned incorrectly. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-18 18:43:31 -07:00
Leonardo de Moura
a46bf357b0 Fix bug in level.cpp. Add new example 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-18 18:37:47 -07:00
Leonardo de Moura
95cfac426d Add parse_level. Fix bug at environment::is_ge 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-18 18:25:34 -07:00
Leonardo de Moura
676ebcca3d Add parse_arrow 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-18 15:44:39 -07:00
Leonardo de Moura
afd62ced87 Add parse_let 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-18 15:25:20 -07:00
Leonardo de Moura
cdccca9316 Rename builtin operator if-then-else 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-18 11:02:29 -07:00
Leonardo de Moura
a6f36ba546 Improve formatter usage. Fix bug in object printer. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-17 11:29:43 -07:00
Leonardo de Moura
b633c866e6 Expose environment API in the frontend object. Add support for formatting objects. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-17 10:55:42 -07:00
Leonardo de Moura
15c1c97873 Refactor frontend pretty printer 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 20:40:39 -07:00
Leonardo de Moura
0fbfef8eb0 Remove sanitize_names from kernel 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 20:40:39 -07:00
Leonardo de Moura
e792e079e2 Add formatter API 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 20:40:39 -07:00
Leonardo de Moura
cbff5ea856 Cleanup 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 20:40:39 -07:00
Leonardo de Moura
111cdd4e62 Remove pretty printer from kernel. Add basic printing capability to exprlib module. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 20:40:39 -07:00
Leonardo de Moura
519a290f32 Refactor kernel objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 20:40:39 -07:00
Leonardo de Moura
c41b3dc4d8 Add kernel_exceptions. The idea is to avoid expression formatting in the kernel. It also allows different frontends to display the error messages is a different way. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 12:51:12 -07:00
Leonardo de Moura
1038f7346e Refine initialization order. Polish Universe command pretty printer. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 09:30:08 -07:00
Leonardo de Moura
abab4b667a Define implies using ite operator. Rename mk_bin_op to mk_bin_rop (it is using right associativity). Add mk_bin_lop (for left assoc). 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-16 09:04:59 -07:00
Leonardo de Moura
efbf3a434d Highlight assignment keyword 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 20:00:12 -07:00
Leonardo de Moura
5ec2780321 Extend formatter with support for definitions and postulates. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:26:58 -07:00
Leonardo de Moura
790d4a4447 Move pretty printer to frontend. Add support for mixfix pretty printing 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
5395ced0e5 Improve comments 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
d6d221b992 Move auxiliary files away from kernel 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
99219f998b Rename files sets.h and maps.h to expr_sets.h and expr_maps.h 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
013fa866fa Add iterator for traversing local objects (i.e., ignores objects defined in ancestor environments) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
2b7834c5fc Add methods for creating infix, prefix, postfix operators in the frontend object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
577256fedc Add highlight_keyword, highlight_builtin, highlight_command for consistent formatting 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-15 19:02:28 -07:00
Leonardo de Moura
2d74ff5fe0 Cache results of the normalizer. Add example that demonstrates the exponential performance improvement. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 23:18:50 -07:00
Leonardo de Moura
984c4149fa Add helper functions for creating Let expressions. Add simple type checking test for Let expressions. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 22:30:12 -07:00
Leonardo de Moura
b0f2ee6de0 Add notation support to frontend object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:18 -07:00
Leonardo de Moura
5bfb074eaf Create objects for universe variable declarations. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:18 -07:00
Leonardo de Moura
285c8dafdc Display context_entry body when pretty printing contexts. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:18 -07:00
Leonardo de Moura
23d245bb2e Sanitize context names before generating error messages. Add [[ noreturn ]] attribute to functions that always throw exceptions. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:18 -07:00
Leonardo de Moura
a6f0a69186 Avoid head and tail when manipulating contexts 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:18 -07:00
Leonardo de Moura
56305e4672 Add sanitize_names for (local) contexts 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:17 -07:00
Leonardo de Moura
e5b8c45b3f Rename type to domain in contexts (aka telescopes). Reason: make name convention consistent with the one used for abstractions (lambdas and pis). 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:17 -07:00
Leonardo de Moura
338ce88ea0 Add occurs function 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-14 18:17:17 -07:00
Leonardo de Moura
2dad1e0e33 Fix type mismatch error message 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 19:24:11 -07:00
Leonardo de Moura
392b347f53 Add expr_formatter and expr_locator. Add better error messages. Improve simple printer. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 19:16:40 -07:00
Leonardo de Moura
3bcbdf7c7b Add options to customize formatter 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 16:19:30 -07:00
Leonardo de Moura
11a9cac5d6 Refactor kernel objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 15:13:54 -07:00
Leonardo de Moura
0a4e03efc5 Remove option name::separator, it can't be configured during runtime 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 08:18:01 -07:00
Leonardo de Moura
2ea7479ee9 Move sexpr/format/options to util/sexpr (reason: circular dependency between util and numerics lib), now numerics depend on util, and sexpr depends on numerics and util. Add scanner to frontend. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 03:40:51 -07:00
Leonardo de Moura
4eeb72b0ee Fix performance problem in has_free_var. Add new test at src/tests/kernel/free_vars.cpp that exposes the problem. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-11 11:19:59 -07:00
Leonardo de Moura
5c6ee647a9 Fix bug in has_free_vars_fn. Add optimization to type_checker. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-10 22:05:04 -07:00
Leonardo de Moura
3a1514982f Add small optimization. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-10 21:02:45 -07:00
Leonardo de Moura
7ebaac62a8 Add scoped_map. Cache type checker results. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-10 19:27:56 -07:00
Leonardo de Moura
f79c0d3546 Add support for cygwin 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-10 14:21:13 -07:00
Leonardo de Moura
9fbe99bf58 Rename define_uv -> add_uvar 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-10 14:21:13 -07:00
Leonardo de Moura
3d9f9a12d1 Enable automatic coercion from 'char const *' to hierachical name 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-10 14:21:13 -07:00
Soonho Kong
a1229692b0 Add static_asserts for higher-order functions in kernel/for_each.h and kernel/pp.cpp 2013-08-09 22:41:07 -07:00
Leonardo de Moura
ecf9506abe Add object iterator for environment objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-08 18:38:18 -07:00
Leonardo de Moura
2d4caa7450 Mark 'implicit' parameters, and move them to the beginning 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 21:53:19 -07:00
Leonardo de Moura
e558edcd52 Use ',' as separator for lambda 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 21:53:19 -07:00
Leonardo de Moura
3fbc506271 Rename Truth to Trivial, and delete Trivial macro 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 21:53:19 -07:00
Leonardo de Moura
2670e94398 Add pretty printer for Lean environment 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 19:10:12 -07:00
Leonardo de Moura
84de625ee4 Rename pp functions (that do not use format lib) to print 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 12:10:10 -07:00
Leonardo de Moura
dd21cdcc95 Add more theorems. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 11:23:04 -07:00
Leonardo de Moura
5acedcddbb Remove useless is_* functions. We can use equality for that (more readable and similar performance). 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 08:34:50 -07:00
Leonardo de Moura
2d27573e0c Add ImpAntisym axiom 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 08:29:20 -07:00
Leonardo de Moura
722e2b0ed4 Reformat code (make formating more consistent) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 08:17:33 -07:00
Leonardo de Moura
58fef282c3 Refactor theorems. Add new theorems. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-07 01:16:37 -07:00
Leonardo de Moura
345894d4ed Add => as a primitive. Define Not, And and Or using =>. Add MP and Discharge as axioms. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 20:22:09 -07:00
Leonardo de Moura
d88ff6f8e1 Add more theorems 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 19:10:38 -07:00
Leonardo de Moura
d1388f5e3c Define Lean forall. Prove forall elimination. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 16:44:58 -07:00
Leonardo de Moura
4c28cb933b Fix bug in is_convertible 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 16:44:22 -07:00
Leonardo de Moura
3ff3eb6444 Add Eta axiom 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 14:47:13 -07:00
Leonardo de Moura
68d092f5ef Prove congr1, congr2 and congr theorems. Add xtrans theorem. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 14:37:30 -07:00
Leonardo de Moura
ab915fb3f0 Add add_theorem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 12:24:20 -07:00
Leonardo de Moura
9d6b421be9 Add theorems Truth, EqMP and EqTElim 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 12:17:55 -07:00
Leonardo de Moura
84f4a32c0e Change name convention for creating Lean expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 11:27:14 -07:00
Leonardo de Moura
33d2dd2d8b Add subst proof rule. Define symm and trans using subst. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 02:03:22 -07:00
Leonardo de Moura
30513398bb Add basic definitions and axioms 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-05 20:06:42 -07:00
Leonardo de Moura
2986f0543e Simplify how universe variable constraints are represented in the kernel. Allow universe variable to be created without an environment. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-05 20:06:42 -07:00
Leonardo de Moura
7e2d7dcf3d Add more builtin constants 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-05 20:06:42 -07:00
Leonardo de Moura
0c610e0a77 Fix bug in type checker 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-05 20:06:42 -07:00
Leonardo de Moura
70de591934 Add definitions and facts 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 20:52:14 -07:00
Leonardo de Moura
5f77a2367f Allow Boolean expressions (aka propositions) to be used as types. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 18:26:01 -07:00
Leonardo de Moura
4b5d60f2b2 Add get_uvar method 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 17:47:54 -07:00
Leonardo de Moura
c97db1f0cf Add children environments 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 16:07:37 -07:00
Leonardo de Moura
95447deea3 Add normalization a = b for values (aka semantic attachments) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 14:54:33 -07:00
Leonardo de Moura
f0ccb2a03e Rename eqp --> is_eqp. The name is too similar to heterogeneous equality constructor eq. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 09:41:49 -07:00
Leonardo de Moura
3f789ce2b7 Add let and heterogeneous equality. Add bool_type and bool_value. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-04 09:37:52 -07:00
Leonardo de Moura
b979436c40 Add basic semantic attachments for arithmetic 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 19:57:06 -07:00
Leonardo de Moura
15a4152ce8 Fix merge problem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:13:56 -07:00
Leonardo de Moura
0a679074f0 Add support for semantic attachments. Remove expr_numeral 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:12:15 -07:00
Leonardo de Moura
1fec8b0d5b Rename (stack) value to svalue 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:12:15 -07:00
Leonardo de Moura
0b8fa3b167 Remove dead code 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:12:15 -07:00
Leonardo de Moura
cce469119f Flip order of the arguments for instance and abstract. Simplify type_checker. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:12:15 -07:00
Leonardo de Moura
190855ad1b Add (relaxed) version of instantiate that can substitute terms containing free variables 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:12:15 -07:00
Leonardo de Moura
2972bdfec3 Rename abst_type to abst_domain 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-03 16:12:12 -07:00
Soonho Kong
bac75541dc Add static_asserts to template funcs in expr.h & replace.h 2013-08-02 20:00:40 -07:00
Leonardo de Moura
a8c77ff40e Disable eta-reduction for now. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-01 23:19:34 -07:00
Leonardo de Moura
3ef9d21875 Fix bugs in type checker 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-01 21:40:39 -07:00
Leonardo de Moura
7b00561a94 Normalize level expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-01 21:40:39 -07:00
Leonardo de Moura
e220d7c525 Add type checker. Fix normalization with non-empty context 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-01 21:40:36 -07:00
Leonardo de Moura
bed5f09907 Rename normalize context to local_context. Create context. Fix bug in name.cpp 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-01 21:39:02 -07:00
Soonho Kong
322c2b472d Add more to expr pretty-print 2013-08-01 18:54:06 -07:00
Soonho Kong
5a89bffe83 Add pp to expr 2013-08-01 15:42:06 -07:00
Soonho Kong
0f98ee03b5 Use 'nullptr' instead of '0' 2013-08-01 13:57:43 -07:00
Leonardo de Moura
10def5cabe Remove duplicate code 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-29 21:34:16 -07:00
Leonardo de Moura
4efa9a92df Fix performance issue 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-29 21:33:43 -07:00
Leonardo de Moura
08b750c825 Remove Prop from kernel 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-29 19:49:34 -07:00
Leonardo de Moura
6452c69b96 Use level at kernel expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-29 19:44:26 -07:00
Leonardo de Moura
537e2c101c Add more tests. Fix bug in universe implication test. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-29 19:05:43 -07:00
Leonardo de Moura
299ec9c254 Fix space 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-28 23:14:27 -07:00
Leonardo de Moura
279e524c9e Fix bug in universe levels 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-28 23:11:35 -07:00
Leonardo de Moura
a4f456c99e Universe levels 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-28 22:34:39 -07:00
Leonardo de Moura
a241d5f4b1 Add eta-reduction 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-26 12:37:13 -07:00
Leonardo de Moura
ed13132c12 Add has_free_var, lower_free_vars 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-26 12:27:55 -07:00
Leonardo de Moura
09708209a7 Improve documentation 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-26 11:43:53 -07:00
Leonardo de Moura
f7138b6ecf Fix normalize 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-25 19:13:45 -07:00
Leonardo de Moura
14c899e7ca Add normalize 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 19:36:54 -07:00
Leonardo de Moura
1f7011353b Add (temporary) buffer class 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:57:51 -07:00
Leonardo de Moura
0fb93ad6ef Expose max_sharing_fn object 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
59592ed36b Add deep copy for kernel expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
ceb6537e3a Fix race condition when updating expression flags: max_shared and closed 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
1398c927cd Fix compilation error with clang++ 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
4b61639f4d Use consistent naming for functional objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
4ae0c4c445 Remove dead code 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
9b3c47a521 Refactor instantiate/abstract code 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
c7b12a2815 Add abstract/instantiate for kernel expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
ed6d6483fe Rename abst_expr -> abst_body 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
9fd88e6e27 Add small demo 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:32 -07:00
Leonardo de Moura
576726bf58 Use operator() for creating applications 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:31 -07:00
Leonardo de Moura
54a02b4fc7 Simplify expr accessor names 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:31 -07:00
Leonardo de Moura
2c3fc09e3c Add has_free_vars/closed function 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:31 -07:00
Leonardo de Moura
17e69e32d7 Add expression offset pair 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:31 -07:00
Leonardo de Moura
6a2c9ef076 Rename/Reorg some kernel files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:31 -07:00
Leonardo de Moura
90f498994a Add some overloads 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-24 14:56:31 -07:00
Leonardo de Moura
f00d8c4683 Fix bug in max_sharing 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-23 09:18:18 -07:00
Leonardo de Moura
dd74284fdc Cleanup eq_functor 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-23 09:12:15 -07:00
Leonardo de Moura
79d00f4d78 Rename max_sharing files 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-23 09:01:54 -07:00
Leonardo de Moura
5aa25a635f Add max_shared flag to expr_cell. Improve app constructor. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-23 08:59:39 -07:00
Leonardo de Moura
2a9d0de57b Add max_shared: function for computing maximally shared expressions. 2013-07-22 19:31:27 -07:00
Leonardo de Moura
aed8a07c1b Add sexpr test 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-22 19:02:11 -07:00
Leonardo de Moura
06320c8615 Replace expr == with recursive function. Add goodies for traversing expressions. 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-22 16:40:17 -07:00
Leonardo de Moura
c4cd6c4f84 Add tests for kernel expression 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-22 13:04:27 -07:00
Leonardo de Moura
c32dfe22b6 Add expressions (dependent type theory) 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-07-22 12:46:11 -07:00