Leonardo de Moura
1fd5e9682d
refactor(kernel/free_vars): use get_free_var_range to improve lift_free_vars and lower_free_vars performance
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-04-17 12:41:06 -07:00
Leonardo de Moura
4ae958af56
refactor(kernel/free_vars): use get_free_var_range to improve has_free_var_in_range performance
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-04-17 12:18:19 -07:00
Leonardo de Moura
dc864bf7b9
feat(kernel): store free variable range in composite expressions
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-04-17 11:31:48 -07:00
Leonardo de Moura
bc8379256a
refactor(kernel): remove pairs from kernel
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-04-17 10:52:07 -07:00
Leonardo de Moura
3651b4ecd0
refactor(kernel): replace_fn functional object
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-03-18 10:27:57 -07:00
Leonardo de Moura
bf13441bd7
fix(kernel): bugs in justification module, add missing metavar methods, add basic metavar tests
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-03-18 10:27:56 -07:00
Leonardo de Moura
eb046c11fb
refactor(kernel): the type in let-exprs is not optional anymore, if the user does not provide it, we use a metavariable
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-03-18 10:27:55 -07:00
Leonardo de Moura
db31cc37a1
refactor(kernel/free_vars): cleanup free_vars procedures
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-03-18 10:27:55 -07:00
Leonardo de Moura
6d7ec9d7b6
refactor(kernel): add heterogeneous equality back to expr
...
The main motivation is that we will be able to move equalities between universes.
For example, suppose we have
A : (Type i)
B : (Type i)
H : @eq (Type j) A B
where j > i
We didn't find any trick for deducing (@eq (Type i) A B) from H.
Before this commit, heterogeneous equality as a constant with type
heq : {A B : (Type U)} : A -> B -> Bool
So, from H, we would only be able to deduce
(@heq (Type j) (Type j) A B)
Not being able to move the equality back to a smaller universe is
problematic in several cases. I list some instances in the end of the commit message.
With this commit, Heterogeneous equality is a special kind of expression.
It is not a constant anymore. From H, we can deduce
H1 : A == B
That is, we are essentially "erasing" the universes when we move to heterogeneous equality.
Now, since A and B have (Type i), we can deduce (@eq (Type i) A B) from H1. The proof term is
(to_eq (Type i) A B (to_heq (Type j) A B H)) : (@eq (Type i) A B)
So, it remains to explain why we need this feature.
For example, suppose we want to state the Pi extensionality axiom.
axiom hpiext {A A' : (Type U)} {B : A → (Type U)} {B' : A' → (Type U)} :
A = A' → (∀ x x', x == x' → B x == B' x') → (∀ x, B x) == (∀ x, B' x)
This axiom produces an "inflated" equality at (Type U) when we treat heterogeneous
equality as a constant. The conclusion
(∀ x, B x) == (∀ x, B' x)
is syntax sugar for
(@heq (Type U) (Type U) (∀ x : A, B x) (∀ x : A', B' x))
Even if A, A', B, B' live in a much smaller universe.
As I described above, it doesn't seem to be a way to move this equality back to a smaller universe.
So, if we wanted to keep the heterogeneous equality as a constant, it seems we would
have to support axiom schemas. That is, hpiext would be parametrized by the universes where
A, A', B and B'. Another possibility would be to have universe polymorphism like Agda.
None of the solutions seem attractive.
So, we decided to have heterogeneous equality as a special kind of expression.
And use the trick above to move equalities back to the right universe.
BTW, the parser is not creating the new heterogeneous equalities yet.
Moreover, kernel.lean still contains a constant name heq2 that is the heterogeneous
equality as a constant.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-07 10:28:10 -08:00
Leonardo de Moura
8eec289ce1
feat(kernel): add dependent pairs
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-03 16:52:49 -08:00
Leonardo de Moura
24452289dd
feat(library/simplifier): make sure the simplifier can handle meta-variables
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-28 20:30:47 -08:00
Leonardo de Moura
3b152d1a9e
refactor(kernel): use ro_metavar_env instead of metavar_env in places where we only need to read the metavariable environment
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-27 16:44:43 -08:00
Leonardo de Moura
27ab49ae9d
feat(library/simplifier): bottom-up simplifier skeleton
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-18 12:49:41 -08:00
Leonardo de Moura
a43020b31b
refactor(kernel): remove heterogeneous equality
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-16 17:39:12 -08:00
Leonardo de Moura
a968a43487
fix(kernel/free_vars): make sure has_free_var does not return incorrect result due to arithmetic overflows
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-14 14:36:14 -08:00
Leonardo de Moura
e6c322d97f
feat(kernel/free_vars): make free_vars module functions more robust
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-12 17:44:28 -08:00
Leonardo de Moura
5d9a95addd
refactor(kernel/free_vars): replace max_free_var with relaxed free_var_range
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-12 17:06:57 -08:00
Leonardo de Moura
4d9eb4ac6c
feat(kernel): add max_free_var function
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-12 16:45:34 -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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
5c3866cd71
Use fullpath in #include directives, add missing STL headers
2013-09-13 03:35:29 -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
cbff5ea856
Cleanup
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-08-16 20:40:39 -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
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
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
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
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
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
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
2972bdfec3
Rename abst_type to abst_domain
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-08-03 16:12:12 -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
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
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
4b61639f4d
Use consistent naming for functional objects
...
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-07-24 14:56:32 -07:00