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113 commits

Author SHA1 Message Date
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Soonho Kong
bc60b47295 Apply coding style 2013-09-13 18:48:09 -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
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
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
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
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
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
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
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
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
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
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
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
11a9cac5d6 Refactor kernel objects 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-13 15:13:54 -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
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
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
ab915fb3f0 Add add_theorem 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-06 12:24:20 -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
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
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
7b00561a94 Normalize level expressions 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2013-08-01 21:40:39 -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