Commit graph

353 commits

Author SHA1 Message Date
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