Commit graph

769 commits

Author SHA1 Message Date
Leonardo de Moura
8d584e54da feat(frontends/lean): add exact_apply
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-30 00:51:11 -07:00
Leonardo de Moura
ccdb96775f feat(frontends/lean/parser): allow 'assume'/'take'/'fun' as notation for apply tactic
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 23:00:41 -07:00
Leonardo de Moura
33cb9382aa feat(frontends/lean): add beta-reduction tactic command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 19:41:54 -07:00
Leonardo de Moura
360e9b9486 feat(library/tactic): add apply tactic
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 18:33:53 -07:00
Leonardo de Moura
6645fdeae0 feat(frontends/lean): add repeat tactic command, refactor tactic sequence notation
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 12:24:13 -07:00
Leonardo de Moura
2510d5722a feat(frontends/lean): add unfold tactic command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 12:05:45 -07:00
Leonardo de Moura
6d09d82a7c feat(frontends/lean): add notation for orelse tactic, add show and now tactics
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 11:39:18 -07:00
Leonardo de Moura
a1bbb09de4 feat(frontends/lean): add notation for then tactic
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 11:24:56 -07:00
Leonardo de Moura
6891f48c67 fix(library/module): do not store full path of imported modules
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 10:48:57 -07:00
Leonardo de Moura
1f0171cd57 fix(frontends/lean/dependencies): compilation warning
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 09:55:30 -07:00
Leonardo de Moura
ffa175009b feat(frontends/lean): use tactics for solving unassigned metavariables
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 09:50:16 -07:00
Leonardo de Moura
1e39a21823 feat(frontends/lean): add basic tactics
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 09:03:51 -07:00
Leonardo de Moura
ec18bd93f9 feat(frontends/lean): send tactic hint table to elaborator
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-29 07:03:25 -07:00
Leonardo de Moura
65c63e146f feat(frontends/lean): add display_deps function, and --deps command line option
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-28 18:35:18 -07:00
Leonardo de Moura
193ce35419 refactor(frontends/lean/inductive_cmd): redesign inductive datatype elaboration, use the new elaborator, and use simpler algorithm to infer the resulting universe
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-28 15:33:56 -07:00
Leonardo de Moura
0adacb5191 feat(kernel): add infer implicit, and use it to infer implicit arguments of inductive datatype eliminators, and tag whether parameters should be implicit or not in introduction rules in the module inductive_cmd
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-28 13:57:36 -07:00
Leonardo de Moura
0e015974ca fix(library/unifier): bug in process_flex_rigid, also cleanup the code and break it into different cases
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-28 11:19:56 -07:00
Leonardo de Moura
47ff300d1a fix(frontends/lean): '@' explicit mark
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-28 07:30:36 -07:00
Leonardo de Moura
cf9b486179 feat(frontends/lean): automatically import lua modules imported by imported lean files
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-27 23:23:51 -07:00
Leonardo de Moura
aaa7960b75 refactor(library/tactic/goal): use local names for hypotheses
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-27 11:11:12 -07:00
Leonardo de Moura
ccce9d90a4 feat(frontends/lean/elaborator): add 'delayed coercions', add example demonstrating why the new feature is useful
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 18:39:23 -07:00
Leonardo de Moura
e769121c2a fix(frontends/lean/elaborator): memory leaks that only occur when compiling with clang++
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 16:02:54 -07:00
Leonardo de Moura
16bdc51fc4 refactor(kernel/type_checker): simplify type checker API, and remove add_cnstr_fn
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 13:36:31 -07:00
Leonardo de Moura
930960c54d fix(frontends/lean/builtin_cmds): abstract section parameters in the 'check' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 10:06:50 -07:00
Leonardo de Moura
0480dab986 feat(frontends/lean/parse_table): avoid duplicates in the parse table
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 09:32:19 -07:00
Leonardo de Moura
2d2f23cda6 feat(library/lean/lean): improve overload error message
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 08:52:40 -07:00
Leonardo de Moura
656bcd55ed fix(frontends/lean): save 'choice' position
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 08:50:44 -07:00
Leonardo de Moura
52ff29a6f7 feat(frontends/lean): add 'coercion' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-26 08:08:39 -07:00
Leonardo de Moura
06f9e7bfdd fix(build): add missing file
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 18:12:23 -07:00
Leonardo de Moura
acf8c13619 feat(kernel): add strict implicit arguments
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 17:50:49 -07:00
Leonardo de Moura
9f83ef8f6c chore(frontends/lean/elaborator): cleanup
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 17:13:03 -07:00
Leonardo de Moura
543b1003a6 fix(frontends/lean/elaborator): typo
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 13:11:35 -07:00
Leonardo de Moura
f2b41312fb feat(frontends/lean): add '@' explicit notation
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 12:50:47 -07:00
Leonardo de Moura
905209df1c fix(frontends/lean/elaborator): to cache values, we must push/pop whenever we update the m_ctx
Thus, we are disabling the cache for now.
It is also unclear whether it is useful or not.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 11:05:14 -07:00
Leonardo de Moura
0791c83731 fix(frontends/lean/parser): add missing save_pos
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 10:32:43 -07:00
Leonardo de Moura
6db6048bf8 feat(library/error_handling): pretty print unifier exceptions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 09:41:25 -07:00
Leonardo de Moura
5b6589709c fix(frontends/lean/decl_cmds): allow binders but no type in definitions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 09:00:57 -07:00
Leonardo de Moura
3e7dfa6212 fix(frontends/lean): infer type of definitions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 08:39:14 -07:00
Leonardo de Moura
d055c4880f feat(frontends/lean): connect new elaborator to frontend
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-25 08:31:00 -07:00
Leonardo de Moura
fe0cee7536 feat(frontends/lean): add frontend elaborator
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-24 18:25:56 -07:00
Leonardo de Moura
603dafbaf7 refactor(kernel): remove 'let'-expressions
We simulate it in the following way:
1- An opaque 'let'-expressions (let x : t := v in b) is encoded as
      ((fun (x : t), b) v)
   We also use a macro (let-macro) to mark this pattern.
   Thus, the pretty-printer knows how to display it correctly.

2- Transparent 'let'-expressions are eagerly expanded by the parser.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-24 16:27:27 -07:00
Leonardo de Moura
61595f516c fix(frontends/lean/notation_cmd): initialization bug
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-23 16:20:28 -07:00
Leonardo de Moura
aa8b5655dd feat(frontends/lean): add notation overwrite
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-23 16:10:36 -07:00
Leonardo de Moura
5bd86754af feat(frontends/lean/builtin_cmds): change notation for marking implicit/cast parameter in sections
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-22 17:51:00 -07:00
Leonardo de Moura
c7c5e41653 fix(frontends/lean/parser): warning when compiling in release mode
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-22 09:58:05 -07:00
Leonardo de Moura
2589d60bfd feat(frontends/lean): add nameless 'have' expression
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-20 17:18:18 -07:00
Leonardo de Moura
4b227409bf feat(frontends/lean): add 'then have' expression
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-20 14:27:21 -07:00
Leonardo de Moura
4560413a92 feat(frontends/lean): add '[fact]' modifier for 'have' expression
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-20 11:58:05 -07:00
Leonardo de Moura
39177ec10a feat(frontends/lean): flip definition modifiers position, now they must occur after the identifier
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-20 11:58:05 -07:00
Leonardo de Moura
16412daf39 feat(frontends/lean): add 'using' syntax sugar for adding expressions to the goal's context
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-20 11:58:05 -07:00
Leonardo de Moura
2cc8172d61 refactor(frontends/lean): remove m_pos field from parameter object
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-19 23:06:49 -07:00
Leonardo de Moura
05d1832425 refactor(kernel/type_checker): improve ensure_pi and ensure_sort APIs
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-19 22:33:58 -07:00
Leonardo de Moura
0cc8117fb4 fix(frontends/lean): add missing file
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-19 06:10:15 -07:00
Leonardo de Moura
bdab979e09 feat(frontends/lean): add inductive_cmd
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-18 16:00:59 -07:00
Leonardo de Moura
461689f758 refactor(frontends/lean/builtin_cmds): move declaration commands to new file
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-18 15:55:52 -07:00
Leonardo de Moura
08845be2fc feat(frontends/lean/notation_cmd): improve 'notation' cmd
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-18 09:28:01 -07:00
Leonardo de Moura
3e3c4ee5ed feat(frontends/lean/parser): add local_scope object to Lua API
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-18 08:38:23 -07:00
Leonardo de Moura
6259d20218 feat(frontends/lean/parser): expand Lua parser API
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-18 08:03:17 -07:00
Leonardo de Moura
3ea24c0f32 fix(library/kernel_bindings): set_environment and set_io_state objects
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 22:36:47 -07:00
Leonardo de Moura
06002c5312 feat(frontends/lean/parser): use system_import when processing Lean import command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 22:09:42 -07:00
Leonardo de Moura
1378fa5cbb refactor(util/script_state): remove support for threads and communication channels from the Lua API, the goal is to keep is simple, and use one Lua state object per thread
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 21:56:45 -07:00
Leonardo de Moura
f17e8a853a feat(frontends/lean): allow parser actions to be implemented using Lua
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 21:56:16 -07:00
Leonardo de Moura
4cbc429192 feat(frontends/lean/calc): add parse_calc function
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 17:16:15 -07:00
Leonardo de Moura
037cfcf622 refactor(frontends/lean/notation_cmd): add register_notation_cmds procedure
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 13:39:44 -07:00
Leonardo de Moura
e178979061 feat(frontends/lean): add calc_subst, calc_refl, calc_trans commands for configuring calc-expressions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 13:35:31 -07:00
Leonardo de Moura
ddba6b222a feat(frontends/lean): add calculational proof environment extension, it stores transitivity, reflexivity (and substitution) rules
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 13:13:13 -07:00
Leonardo de Moura
28c904abea feat(frontends/lean/parser): add 'flag' for disabling 'unknown identifier' errors
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 10:30:03 -07:00
Leonardo de Moura
4be05e1d8c refactor(frontends/lean): expose notation_entry and token_entry structures, and add functions for parsing notation without affecting the environment
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 10:12:04 -07:00
Leonardo de Moura
819c8276f2 feat(frontends/lean/builtin_cmds): add 'variables' command family
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-17 08:25:00 -07:00
Leonardo de Moura
ea49176043 feat(frontends/lean/builtin_cmds): add 'using' command, and 'hiding/renaming' directives
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 18:42:39 -07:00
Leonardo de Moura
639d58f4c7 feat(frontends/lean/builtin_cmds): add 'print options' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 17:31:28 -07:00
Leonardo de Moura
3e377a9732 feat(frontends/lean/builtin_cmds): add 'set_option' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 17:27:43 -07:00
Leonardo de Moura
82e79d9c78 fix(frontends/lean/parser): style
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 16:54:44 -07:00
Leonardo de Moura
a964ceb0e2 feat(frontends/lean): add 'import' command, add command line option for setting number of threads
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 16:37:46 -07:00
Leonardo de Moura
4f3da90443 feat(frontends/lean/builtin_exprs): add 'have' and 'show' expressions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 15:04:29 -07:00
Leonardo de Moura
07f2379dec refactor(kernel): add mk_local function that has only two arguments
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 14:27:26 -07:00
Leonardo de Moura
f1e3449aae fix(frontends/lean): propagate position information
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 13:20:10 -07:00
Leonardo de Moura
f70b1b028a feat(frontends/lean): provide position to parse_fn external function, add 'by' expression
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 12:28:58 -07:00
Leonardo de Moura
34dfacc10e refactor(frontends/lean): Bool does not need to be a reserved keyword
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 10:52:12 -07:00
Leonardo de Moura
6db265e7ab feat(frontends/lean/builtin_exprs): parse '_' placeholder
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 10:41:08 -07:00
Leonardo de Moura
5ce0502a36 feat(frontends/lean/builtin_exprs): add parser for 'let' expressions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 09:50:34 -07:00
Leonardo de Moura
775e10186d refactor(parser): use 'scope objects' for creating local scopes and setting m_type_use_placeholder flag
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-16 09:24:41 -07:00
Leonardo de Moura
27130c9499 feat(frontends/lean): local notation 'shadows' global one
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-15 11:50:41 -07:00
Leonardo de Moura
28047a33ae feat(frontends/lean): add local notation support
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-15 11:30:52 -07:00
Leonardo de Moura
64cafd6875 feat(frontends/lean/notation_cmd): add 'notation' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-15 10:49:05 -07:00
Leonardo de Moura
9b389a96d5 feat(frontends/lean/notation_cmd): modify infixl/infixr/postfix command syntax
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-15 08:28:49 -07:00
Leonardo de Moura
e7019ec840 feat(frontends/lean): add infixl/infixr/postfix/precedence commands, add support for storing notation in .olean files, add support for organizing notation into namespaces
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-14 22:13:25 -07:00
Leonardo de Moura
891a3fb48b feat(frontends/lean): add command block reader with snapshot and resume
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-14 14:13:32 -07:00
Leonardo de Moura
6b99a29c2c refactor(frontends/lean): add local_decls template that is cheap to copy
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-14 09:56:05 -07:00
Leonardo de Moura
5fee6fd140 feat(shell/lean): add '-o' command line option
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-14 08:10:43 -07:00
Leonardo de Moura
282a35bd1b feat(frontends/lean): add '#setline' directive
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-14 07:28:56 -07:00
Leonardo de Moura
48c58af9b5 feat(frontends/lean/parser): allow explicit universe level to be provided to aliases and locals
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-13 18:00:52 -07:00
Leonardo de Moura
a65c43c0db feat(frontends/lean/builtin_cmds): add definition command family
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-13 17:30:35 -07:00
Leonardo de Moura
01cecb76db feat(frontends/lean/builtin_cmds): add 'variable' command family
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-13 15:13:50 -07:00
Leonardo de Moura
ce259e6265 feat(frontends/lean/parser): add namespace/section/end commands, add support for explicit universe levels, fix Type notation'
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-13 11:34:43 -07:00
Leonardo de Moura
5aca452439 feat(library/aliases): add 'exceptions' and support for universes to add_aliases procedure, add for_each_universe method to environment
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-13 08:26:05 -07:00
Leonardo de Moura
d50376249f feat(library/aliases): add level aliases
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-12 12:35:02 -07:00
Leonardo de Moura
3bde699fbe feat(frontends/lean/parser): add parse_level
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-12 12:34:55 -07:00
Leonardo de Moura
5a008717a4 feat(frontends/lean/parser): add parse_notation
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 21:00:34 -07:00
Leonardo de Moura
e7d7996fa9 feat(frontends/lean/parser): add parser_binder(s) and abstract methods
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 18:51:12 -07:00
Leonardo de Moura
959c3ffc68 feat(frontends/lean/parser): add parse_id method
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 15:09:16 -07:00
Leonardo de Moura
1972a09021 feat(frontends/lean/builtin_cmds): add simple 'print' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 14:35:34 -07:00
Leonardo de Moura
7fd502993b refactor(frontends/lean/cmd_table): remove register_builtin_cmd procedures, they would cause initialization problems
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 14:35:34 -07:00
Leonardo de Moura
2e8ebb6d9e feat(frontends/lean/parser): add 'parse_commands' and 'parse_script'
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 14:32:07 -07:00
Leonardo de Moura
8fcc25d55a fix(frontends/lean/token_table): static initialization problem
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-11 10:56:04 -07:00
Leonardo de Moura
3dc26666b9 feat(frontends/lean): add parser interface
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-10 18:20:59 -07:00
Leonardo de Moura
d3e3301208 refactor(frontends/lean/scanner): use the parser configuration in the environment
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-10 10:59:12 -07:00
Leonardo de Moura
e2adb101d5 feat(frontends/lean): add parser_config environment extension
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-10 10:39:22 -07:00
Leonardo de Moura
d81df2efe2 feat(frontends/lean/parse_table): add use_lambda_abstraction flag to scoped_expr_actions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-10 09:39:01 -07:00
Leonardo de Moura
546f9dc00b chore(frontends/lean): use consistent name conventions, rename token_set to token_table
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-10 09:18:57 -07:00
Leonardo de Moura
00e0cc15ba feat(frontends/lean/token_set): add token_set Lua API
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-09 16:49:22 -07:00
Leonardo de Moura
af0c93e0eb feat(frontends/lean/parse_table): add typedef for notation::parse_table
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-09 15:54:56 -07:00
Leonardo de Moura
439b6c1e96 feat(frontends/lean/parse_table): add parse_table Lua API
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-09 15:33:39 -07:00
Leonardo de Moura
722ea7273e feat(frontends/lean): add parse_table datastructure
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-09 13:20:33 -07:00
Leonardo de Moura
d10d70423a feat(frontends/lean): add new scanner
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-05 18:57:26 -07:00
Leonardo de Moura
4cf1b05831 refactor(library/token_set): move to frontends/lean
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-06-05 13:10:50 -07:00
Leonardo de Moura
e79e0302d0 fix(frontends/lean): style
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-05-15 16:09:21 -07:00
Leonardo de Moura
c6af56260e refactor(frontends/lean): remove dead code
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-05-15 15:51:41 -07:00
Leonardo de Moura
f7e705badb refactor(library/kernel_bindings): reactive some of the kernel Lua bindings
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-04-29 11:52:09 -07:00
Leonardo de Moura
af927ecb7a refactor(frontends/lua): reactivate some of the Lua extensions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-04-28 17:57:39 -07:00
Leonardo de Moura
aa8240985a test(examples/lean): small version of algebraic hierarchy (proof of concept)
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-24 20:51:19 -08:00
Leonardo de Moura
d79e9af210 fix(frontends/lean): help msg
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-18 09:31:30 -08:00
Leonardo de Moura
0878b44fc7 feat(frontends/lean): allow user to import several theories using a single import
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-11 17:15:12 -08:00
Leonardo de Moura
a2d2e36f04 refactor(frontends/lean): remove notation for creating tuples
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-10 09:03:42 -08:00
Leonardo de Moura
633ed6bb69 fix(frontends/lean/parser): bug in add_rewrite
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-09 09:46:56 -08:00
Leonardo de Moura
b24c085cb0 feat(frontends/lean): avoid warning message
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-09 09:26:51 -08:00
Leonardo de Moura
24528ff685 fix(library/elaborator): fix glitches in the elaborator that were forcing us to provide parameters explicitly
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-07 18:02:08 -08:00
Leonardo de Moura
1ec01f5757 refactor(builtin): merge pair.lean with kernel.lean, and add basic theorems
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-07 16:04:44 -08:00
Leonardo de Moura
ad7b13104f feat(*): add support for heterogeneous equality in the parser, elaborator and simplifier, adjusts unit test to reflect changes
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-07 15:03:16 -08:00
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
ff955f9830 chore(frontends/lean/parser): update comments
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 20:56:31 -08:00
Leonardo de Moura
593f1f2ebd fix(frontends/lean): allow user set constants defined in other namespaces as opaque
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 20:56:31 -08:00
Leonardo de Moura
4b4b5e3345 fix(frontends/lean): import explicit versions when using the command 'using'
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 17:33:58 -08:00
Leonardo de Moura
ea06bb2885 feat(frontends/lean/pp): change how lift local entries are pretty printed
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 17:26:38 -08:00
Leonardo de Moura
a51139e63b feat(frontends/lean): position information in error messages
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 17:26:38 -08:00
Leonardo de Moura
e85b1f1ac0 feat(library/elaborator): expose elaborator configuration options
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 17:26:38 -08:00
Leonardo de Moura
1d23d93e60 feat(frontends/lean): new 'have' expression
Add 'have' notation suggested by Jeremy Avigad.
Add his example to the test suite.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 08:03:59 -08:00
Leonardo de Moura
ba9a8f9d98 feat(frontends/lean): add 'show' expression syntax sugar
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-06 07:50:22 -08:00
Leonardo de Moura
493007b7bc fix(frontends/lean/pp): bug in tuple/pair pretty printing
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-04 13:58:01 -08:00
Leonardo de Moura
c9b72df34b fix(frontends/lean/parser): bug when applying tactics to synthesize remaining meta-variables
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-04 11:36:26 -08:00
Leonardo de Moura
9dc86e3cf5 fix(builtin/kernel): rename generalized proof_irrel axiom to hproof_irrel, and derive the restricted one
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-04 10:06:29 -08:00
Leonardo de Moura
61d0c792ff fix(frontends/lean/parser): bug in tuple/proj1/proj2
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-03 22:46:29 -08:00
Leonardo de Moura
4fcc292332 feat(frontends/lean): parse and pretty print pair/tuple projection operators proj1 and proj2, fix bug in the type checker
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-03 22:10:01 -08:00
Leonardo de Moura
cc96b50644 feat(frontends/lean): support for nary-tuples, improve notation for non-dependent tuples, add support in the elaborator for sigma types
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-03 20:53:11 -08:00
Leonardo de Moura
5c991f8fbf feat(frontends/lean): parse and pretty print tuples/pairs
This commit also fixes a bug in the type checker when processing dependent pairs.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-03 20:10:30 -08:00
Leonardo de Moura
5e5ab1429d feat(frontends/lean): parse and pretty print sigma types
This commit also fixes some bugs in the implementation of Sigma types.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-03 18:16:00 -08:00
Leonardo de Moura
c56df132b8 refactor(kernel): remove semantic attachments from the kernel
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-02-02 14:48:27 -08:00
Leonardo de Moura
759aa61f70 refactor(builtin/kernel): define if-then-else using Hilbert's operator
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-30 19:28:42 -08:00
Leonardo de Moura
b45ab9dc30 feat(library/elaborator): use equality constraints instead of convertability constraints on definitions
Convertability constraints are harder to solve than equality constraints, and it seems they don't buy us anything definitions. They are just increasing the search space for the elaborator.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-30 14:13:21 -08:00
Leonardo de Moura
ea6bf224e5 feat(frontends/lean): make the parser accept (Type -> ...)
Before this commit, the parser would accept only a universe level or a ')' after '(' 'Type'

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-29 15:23:20 -08:00
Leonardo de Moura
4dc3aa46c3 feat(frontends/lean): allow tactics to be used in axiom/variable declarations and in the type of definitions/theorems; add a new test showing the need for this feature
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-29 12:02:12 -08:00
Leonardo de Moura
f0a2d3627e refactor(frontends/lean): use ascii prefix for auxiliary let-declarations
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-29 11:58:09 -08:00
Leonardo de Moura
7f53cb9601 feat(frontends/lean/parser): add_rewrite take the 'using' command into account
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-28 01:15:28 -08:00
Leonardo de Moura
4d25cb7f47 feat(library/tactic): add simplify_tactic based on the simplifier
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-26 18:53:18 -08:00
Leonardo de Moura
e8bba1ebf3 fix(frontends/lean/frontend): the definition of the explicit version @f must be definitionally equal to f
Before this commit, the explicit version @f of a constant f with implicit arguments as not definitionally equal to f.

For example, if we had

variable f {A : Type} : A -> Bool

Then, the definition of @f was

definition @f (A : Type) (a : A) : Bool := f A a

This definition is equivalent to
     fun A a, f A a
which is not definitionally equal to
     f
since definitionally equality in Lean ignores Eta conversion.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-25 20:34:28 -08:00
Leonardo de Moura
6bc1537e25 feat(frontends/lean/parser): allow the user to write (Type) without providing a level
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-25 20:17:36 -08:00
Leonardo de Moura
8f455f5965 fix(frontends/lean): bug in scope construct
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-24 17:23:29 -08:00
Leonardo de Moura
7f3e2b3ef4 fix(frontends/lean/parser): bug in 'using' construct
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-24 17:09:46 -08:00
Leonardo de Moura
1638a7bb02 fix(frontends/lean/pp): compute local shared nodes, and avoid unnecessary let's
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-22 21:44:24 -08:00
Leonardo de Moura
ad219d43d9 refactor(*): semantic attachment parsing and simplification
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-20 14:44:45 -08:00
Leonardo de Moura
90ffb9d5ec fix(frontends/lean/pp): bug in pp_abstraction_core
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-19 19:47:40 -08:00
Leonardo de Moura
d322f63113 feat(frontends/lea): add commands for creating and managing rewrite rule sets
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-19 12:03:59 -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
14c6218bdc chore(kernel): file name convention
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-15 20:06:29 -08:00
Leonardo de Moura
3ab2d2a441 fix(frontends/lean/parser): memory leak due to g++ bug
g++ implementation of std::initializer_list has bug.
http://gcc.gnu.org/ml/gcc-bugs/2013-06/msg00095.html

This commit memory leaks triggered by this bug.
It also adds minimal tests to expose three different instances of the problem.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-15 10:15:04 -08:00
Leonardo de Moura
83efa644d1 fix(frontends/lean/parser): uninitialized var error reported by valgrind
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-15 08:43:43 -08:00
Leonardo de Moura
28eb980484 fix(build): C++ module dependency problem, and style
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-14 18:30:31 -08:00
Leonardo de Moura
c8e1ec87d2 feat(library/simplifier): add to_ceqs function that converts a theorem into a sequence of conditional equations
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-14 18:30:19 -08:00
Leonardo de Moura
ccb9faf065 refactor(*): error messages
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-13 16:54:21 -08:00
Leonardo de Moura
55aa4cbfa3 feat(frontends/lean): improve error message for expressions containing unsolved metavariables
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-13 13:21:44 -08:00
Leonardo de Moura
12451e4a35 feat(frontends/lean/pp): display implicit arguments when expression contains metavariables
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-13 12:42:05 -08:00
Leonardo de Moura
35bacf95fc feat(shell): provide the default environment when parsing Lua files
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-12 18:21:14 -08:00
Leonardo de Moura
582569b793 feat(frontends/lean): allow the user to set the trust_imported flag when creating environments using Lua
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-12 16:46:53 -08:00
Leonardo de Moura
65bdb9c7e0 fix(frontends/lean): unprotected call to Lua API
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-09 19:56:20 -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
a339a53f50 feat(util/options): 'verbose' as a system option, add -q (quiet) option
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-09 15:31:58 -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
84e211b81b fix(frontends/lean): missing ':' in error messages
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-09 11:19:58 -08:00
Leonardo de Moura
f7c7dd4ed4 feat(frontends/lean): include filename in error messages, use GNU error message style
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-09 11:01:27 -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
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
6f4ca7bd2a feat(frontends/lean): expose is_explicit function in the Lua API
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-07 17:36:27 -08:00
Leonardo de Moura
a3af87f8d3 chore(frontends/lean/frontend): remove dead code
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-07 15:28:21 -08:00
Leonardo de Moura
0363faeec8 fix(frontends/lean/scanner): assertion violation, and add more tests
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-07 15:12:34 -08:00
Leonardo de Moura
fb73514913 fix(frontends/lean/parser): parser aborted if the scanner throws an exception in the first call to scan(); position information was being shown twice for scanner exceptions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-07 15:04:30 -08:00
Leonardo de Moura
c7338a8eab chore(frontends/lean/scanner): remove dead code
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-07 14:37:28 -08:00
Leonardo de Moura
0f1737d62c fix(frontends/lean): more precise position information for infix operators
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-07 13:19:26 -08:00
Leonardo de Moura
abb9b8af83 fix(frontends/lean): bug in pop::context command, and add new tests for the universe command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-06 17:14:07 -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
645e748302 feat(frontends/lean): add 'using' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-06 11:41:14 -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
771b099c0c fix(frontends/lean): must invoke lua GC before closing a scope, reason: we may still have references to the current environment inside of the Lua state object
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-05 16:38:29 -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
6569b07b7c feat(frontends/lean/parser): rename 'show' expression to 'have'
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-05 11:25:58 -08:00
Leonardo de Moura
9f08156a73 feat(frontends/lean/parser): combine Echo and Show commands into the 'print' command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-05 11:03:35 -08:00
Leonardo de Moura
ce1213a020 feat(frontends/lean): use '(* ... *)' instead of '(** ... **)' for script code blocks
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-05 10:32:47 -08:00
Leonardo de Moura
028a9bd9bd feat(frontends/lean/scanner): use Lua style comments in Lean
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-05 08:53:27 -08:00
Leonardo de Moura
f5cc2458a9 fix(frontends/lean/parser_calc): missing save calls
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-03 18:26:30 -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
cf35e7bed7 feat(frontends/lean): add support for disequalities in calculational proofs
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 22:47:45 -08:00
Leonardo de Moura
6329d1828d feat(frontends/lean): reuse name expression
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 20:08:21 -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
e714bd7982 feat(frontends/lean): add syntax sugar for applying Subst in calculational proofs
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 11:23:55 -08:00
Leonardo de Moura
111949b9be feat(frontends/lean): calculational proofs
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 10:53:14 -08:00
Leonardo de Moura
0cb741285c chore(*): do not type check imported modules when running .cpp tests
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 07:11:55 -08:00
Leonardo de Moura
d7493ea86c refactor(frontends/lean/parser): use std::function
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 06:53:34 -08:00
Leonardo de Moura
5540fc861a refactor(frontends/lean/parser): break parser in smaller chunks
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 06:48:40 -08:00
Leonardo de Moura
7d18e9b32e refactor(frontends/lean/parser): cleanup
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-02 04:37:21 -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
770145a361 feat(builtin): use namespaces when defining nat, int and real.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-01 12:55:09 -08:00
Leonardo de Moura
d633622d90 feat(frontends/lean/parser): namespaces
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-01-01 12:28:18 -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
390a78a8d2 chore(frontends/lean/parser): remove 'Skipped' message
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-30 15:35:12 -08:00
Leonardo de Moura
08718e33dc refactor(builtin): only load the kernel and natural numbers by default
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-30 13:35:37 -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
46a8300a2d refactor(library/arith): move real and special function declarations to .lean files
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-30 11:02:22 -08:00
Leonardo de Moura
c3bc6afb12 refactor(library/arith): move int and nat declarations to .lean files.
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-30 10:32:14 -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
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
15621610e9 refactor(library/arith): replace Nat, Int, Real with simple variable decls instead of semantic attachments
This commit also fixes bugs in the Alias command.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-29 17:04:36 -08:00
Leonardo de Moura
a1a5fb101d feat(frontends/lean): add Alias command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-29 16:25:45 -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
b1efdac07b feat(frontends/lean/parser): universe declarations
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-29 13:15:09 -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
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
1fd81dd3a1 feat(frontends/lean/parser): disable verbose messages when importing files
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-28 12:24:13 -08:00
Leonardo de Moura
44a31dd8fb feat(frontends/lean/parser): improve Import command
- The extension does not have to be provided.
- It can also import Lua files.
- Hierachical names can be used instead of strings.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-28 12:05:01 -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
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
a02c6e70fa fix(frontends/lean/pp): missing parenthesis around nested forall/exists
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-27 12:13:36 -08:00
Leonardo de Moura
3f0279b88c refactor(frontends/lua): replace lean.lua.h with util.lua
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 19:49:26 -08:00
Leonardo de Moura
a9ee92aa3f fix(frontends/lean/parser): macro precedence
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 19:17:43 -08:00
Leonardo de Moura
3abfad7a88 feat(frontends/lean/parser): add support for integer arguments in macros
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 18:51:37 -08:00
Leonardo de Moura
f1b97b18b4 refactor(frontends/lean/parser): tactic macros, and tactic Lua bindings
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 15:54:53 -08:00
Leonardo de Moura
ef18cc4a92 fix(frontends/lean/parser): add existing command macros when creating parser object
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 13:38:14 -08:00
Leonardo de Moura
8e4560a866 feat(frontends/lean/parser): protect imported modules from Lua definitions and macros in the file importing the module
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 13:21:36 -08:00
Leonardo de Moura
ba02132a90 feat(frontends/lean/parser): add command macros
The idea is to allow users to define their own commands using Lua.
The builtin command Find is now written in Lua.
This commit also fixes a bug in the get_formatter() Lua API.
It also adds String arguments to macros.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 13:00:28 -08:00
Leonardo de Moura
480781d13e feat(frontends/lean/parser): provide environment as an argument to macros, allow macros to parse tactics
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-26 11:15:45 -08:00
Leonardo de Moura
3673f2ac1d feat(frontends/lean/parser): add Find command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-25 18:31:52 -08:00
Leonardo de Moura
a3dde29f3c feat(frontends/lua/parser): allow users to specify the precedence of macros
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-25 12:27:56 -08:00
Leonardo de Moura
f418491c70 fix(frontends/lua/parser): typo
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-25 12:03:04 -08:00
Leonardo de Moura
8e45064f25 feat(library/tactic/apply_tactic): improved parametric apply_tactic
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-24 22:40:34 -08:00
Leonardo de Moura
75cf751959 feat(library/tactic/apply_tactic): allow apply_tac Lua binding to take expressions as argument
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-24 16:03:16 -08:00
Leonardo de Moura
879ab6924a tests(test/lean): remove 'Importing...' message, the tests using the Import command fail when running on a different machine
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-24 12:26:53 -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
00e89190c2 refactor(library/cast): use .lean file instead of .cpp file to define casting library
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-23 22:04:19 -08:00
Leonardo de Moura
d5dc5cb576 feat(frontends/lean/parser): use LEAN_PATH in the Import command
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-23 22:00:44 -08:00
Leonardo de Moura
8c8cefcb0c feat(frontends/lean/parser): compact definitions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-23 21:24:50 -08:00
Leonardo de Moura
5043cc75f6 fix(frontends/lean/parser): allow parenthesis in level expressions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-23 13:31:55 -08:00
Leonardo de Moura
5244ccafe8 fix(frontends/lean/parser): readline compilation problem on Fedora19
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-23 13:12:39 -08:00
Leonardo de Moura
7c05eb4695 fix(frontends/lean/parser): make sure Lean passes all tests when being compiled with the readline library
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-23 12:57:25 -08:00
Leonardo de Moura
f0833b6f46 chore(frontends/lua/lean.lua.h): fix style warnings
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-22 21:34:20 -08:00
Leonardo de Moura
e91fdaed00 refactor(frontends/lean): rename lean.lua to lean.lua.h
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-22 20:16:31 -08:00
Leonardo de Moura
baf99779dc feat(frontends/lean/frontend_elaborator): use is_convertible to minimize number of coercions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-22 17:57:51 -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
21d244d880 feat(frontends/lean/parser): allow tactic to be used to fill holes in definitions
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-22 12:08:25 -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
9bac91f5ef fix(frontends/lean): libreadline support
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-21 18:57:15 -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
df58eb132e feat(frontends/lean): simplify explicit version names
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-21 17:05:25 -08:00
Leonardo de Moura
ce84fe5d33 feat(frontends/lean): improve error messages when elaborator cannot instantiate all metavariables
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-20 22:00:50 -08:00
Leonardo de Moura
bb81311e0a feat(frontends/lean/parser): include proof state in exception for tactic failure
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-20 17:15:12 -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
96ea8b81c8 feat(frontends/lean/parser): change show-expression binder name
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-20 01:30:18 -08:00
Leonardo de Moura
c730dd7872 feat(frontends/lean/parser): propagate position information to expressions created by macro implemented in Lua
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-20 01:07:37 -08:00
Leonardo de Moura
3eb4de6760 fix(frontends/lean/parser): fix deadlock in macro parser
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 21:40:00 -08:00
Leonardo de Moura
c77464703f feat(frontends/lean): macro definition using Lua
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 19:08:10 -08:00
Leonardo de Moura
d9e692f506 feat(frontends/lean): improve coercion manangement
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 15:45:46 -08:00
Leonardo de Moura
f43db96e1f fix(frontends/lean/pp): pretty printer for Type
Add parenthesis around Type when it has a universe.

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 15:24:45 -08:00
Leonardo de Moura
ae01d3818d fix(frontends/lean/parser): parse_type method
The parser had a nasty ambiguity. For example,
    f Type 1
had two possible interpretations
    (f (Type) (1))
or
    (f (Type 1))

To fix this issue, whenever we want to specify a particular universe, we have to precede 'Type' with a parenthesis.
Examples:
    (Type 1)
    (Type U)
    (Type M + 1)

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 15:24:34 -08:00
Leonardo de Moura
d3d24696f4 feat(frontends/lean): hide builtin object in the 'Show Environment' command
The user can still display builtin objects by using

    Show Environment all

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 14:00:58 -08:00
Leonardo de Moura
ad3f771b1d feat(frontends/lean): hide 'explicit' version of objects with implicit arguments
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 13:12:39 -08:00
Leonardo de Moura
bff5a6bfb2 fix(frontends/lean/pp): make sure pp and parser are using the same precedences
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-19 12:46:14 -08:00
Leonardo de Moura
dd72269b13 feat(frontends/lean): rename command Set to SetOption
It is not nice to have Set as a reserved keyword. See example examples/lean/set.lean

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-18 21:18:48 -08:00
Leonardo de Moura
d7886c4f5f doc(examples/lean): new example
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-18 21:03:16 -08:00
Leonardo de Moura
8cfe5cf9ed fix(frontends/lean/pp): pretty printer was ignoring notation decls in the local scope
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-18 18:00:37 -08:00
Leonardo de Moura
79fa6e4940 feat(frontends/lean): Scopes in the default Lean frontend
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-18 17:40:21 -08:00
Leonardo de Moura
97b872a05c refactor(frontends/lean): remove frontend class, it is not needed anymore
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-18 14:37:55 -08:00
Leonardo de Moura
2aaa9a5273 feat(frontends/lean/parser): change function application precedence
Now, we can write

  Pi (x y : A), R x y -> R y x

instead of

  Pi (x y : A), (R x y) -> (R y x)

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-18 12:44:15 -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
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
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
2fee2def72 feat(library/basic_thms): simplify DoubleNegElim
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-16 13:19:19 -08:00
Leonardo de Moura
de53e92de8 feat(library/basic_thms): add ExistsElim theorem
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-16 12:43:34 -08:00
Leonardo de Moura
8f5c2b7d9f feat(library/basic_thms): add Refute theorem
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-16 12:03:31 -08:00
Leonardo de Moura
19ad39159e feat(library/basic_thms): add ForallIntro theorem
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-15 17:35:31 -08:00
Leonardo de Moura
82dfb553d5 feat(library/basic_thms): add ExistsIntro theorem
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-15 16:26:23 -08:00
Leonardo de Moura
160a8379ef feat(library/elaborator): provide the metavar_env to instantiate and lift_free_vars in the elaborator, it will minimize the number of local_entries needed
The modifications started at commit 1852c86948 made a big difference. For example, before these changes test tests/lean/implicit7.lean generated complicated constraints such as:

[x : Type; a : ?M::29[inst:1 ?M::0[lift:0:1]] x] ⊢ Pi B : Type, (Pi _ : x, (Pi _ : (?M::35[inst:0 #0, inst:1 #2, inst:2 #4, inst:3 #6, inst:5 #5, inst:6 #7, inst:7 #9, inst:9 #9, inst:10 #11, inst:13 ?M::0[lift:0:13]] x a B _), (?M::36[inst:1 #1, inst:2 #3, inst:3 #5, inst:4 #7, inst:6 #6, inst:7 #8, inst:8 #10, inst:10 #10, inst:11 #12, inst:14 ?M::0[lift:0:14]] x a B _ _))) ≈
?M::22 x a

After the changes, only very simple constraints are generated. The most complicated one is:

[] ⊢ Pi a : ?M::0, (Pi B : Type, (Pi _ : ?M::0, (Pi _ : B, ?M::0))) ≈ Pi x : ?M::17, ?M::18

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2013-12-14 15:59:35 -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
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
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