Max Brunsfeld
ea47fdc0fe
Rework logic for when to abandon parses with errors
2016-05-29 22:36:47 -07:00
Max Brunsfeld
6535704870
Replace stack_merge_new function with two simpler functions
...
- merge(version1, version2)
- split(version)
2016-05-28 21:22:10 -07:00
Max Brunsfeld
e686478ad2
Rename stack_merge function to stack_merge_all
2016-05-28 20:24:08 -07:00
Max Brunsfeld
e1a3a1daeb
Import error corpus entries from grammar repos
...
Now that error recovery requires no input for the grammar author, it shouldn't
be tested in the individual grammar repos.
2016-05-28 20:12:02 -07:00
Max Brunsfeld
1e353381ff
Don't create error node in lexer unless token is completely invalid
...
Before, any syntax error would cause the lexer to create an error
leaf node. This could happen even with a valid input, if the parse
stack had split and one particular version of the parse stack
failed to parse.
Now, an error leaf node is only created when the lexer cannot understand
part of the input stream at all. When a normal syntax error occurs,
the lexer just returns a token that is outside of the expected token
set, and the parser handles the unexpected token.
2016-05-26 14:15:10 -07:00
Max Brunsfeld
7c859a07bb
Allow null trees in the stack
2016-05-26 13:34:57 -07:00
Max Brunsfeld
a3679fbb1f
Distinguish separators from main tokens via a property on transitions
...
It was incorrect to store it as a property on the lexical states themselves
2016-05-19 16:27:25 -07:00
Max Brunsfeld
59712ec492
Clean up lex table generation
2016-05-19 13:25:46 -07:00
Max Brunsfeld
31cc6e6f9c
Remove unused InProgressSymbolEntry typedef
2016-05-16 12:46:29 -07:00
Max Brunsfeld
77e0e4bb16
Fix some leaks after allocation failures occur
2016-05-16 10:53:31 -07:00
Max Brunsfeld
88053cf723
In tests, don’t record allocations while printing debug graphs
2016-05-16 10:44:19 -07:00
Max Brunsfeld
d50f6a58cc
Abort parse versions w/ worse errors when repairing an error
2016-05-16 10:33:19 -07:00
Max Brunsfeld
507d5ad9f7
Include shift-extra actions alongside other actions in recovery states
2016-05-16 10:33:18 -07:00
Max Brunsfeld
19bd09b81d
Don't include accept actions in recovery states
2016-05-11 14:02:26 -07:00
Max Brunsfeld
22c550c9d6
Discard tokens after error detection to find the best repair
...
* Use GLR stack-splitting to try all numbers of tokens to
discard until a repair is found.
* Check the validity of repairs by looking at the child trees,
rather than the statically-computed 'in-progress symbols' list
2016-05-11 13:49:43 -07:00
Max Brunsfeld
9d247e45b2
Deemphasize extra trees in stack debugging graphs
2016-05-01 15:24:50 -07:00
Max Brunsfeld
9ad1e36238
Rename out_of_context_states -> recovery_states
2016-04-27 14:14:56 -07:00
Max Brunsfeld
5b74813a5c
Refine logic for which tokens to use in error recovery
2016-04-27 14:09:19 -07:00
Max Brunsfeld
31f6b2e24a
Refactor construction of out-of-context states
2016-04-25 21:59:40 -07:00
Max Brunsfeld
e99a3925e0
Merge all versions created in a given reduce operation
2016-04-24 00:55:19 -07:00
Max Brunsfeld
fe74c6fb34
Explicitly mark stack versions in debugging graphs
2016-04-24 00:54:59 -07:00
Max Brunsfeld
fd4c33209e
Select ambiguous alternatives by minimizing error size
2016-04-24 00:54:20 -07:00
Max Brunsfeld
1fb6065f02
Move tree sexp function back to tree, for easier use in debugger
2016-04-24 00:09:32 -07:00
Max Brunsfeld
0d19f157ed
Adjust some spec assertions to reflect finer-grained error recoveries
2016-04-22 10:19:44 -07:00
Max Brunsfeld
cf19b2e58d
Make repeat rules left-recursive instead of right recursive
2016-04-18 12:40:14 -07:00
Max Brunsfeld
0ea2962fbe
Clean up consume_lookahead function
2016-04-18 11:17:07 -07:00
Max Brunsfeld
73c99e9926
Fix returned stack version when popping halts at an error
2016-04-18 11:17:07 -07:00
Max Brunsfeld
f63fcffe95
Fix incorrect cast in ts_language_symbol_is_in_progress
2016-04-18 11:17:07 -07:00
Max Brunsfeld
655d374d0c
Recompile test languages if parser.h changes
2016-04-18 11:17:06 -07:00
Max Brunsfeld
2f81a6f6c7
Don't recover from errors based on extra tokens
2016-04-15 23:14:31 -07:00
Max Brunsfeld
f62e0a3d49
Ensure reference count of new tree copy is 1
2016-04-15 23:01:36 -07:00
Max Brunsfeld
d55df29e49
Remove unused constant
2016-04-15 21:33:57 -07:00
Max Brunsfeld
316aba76ee
Reorder stack methods
2016-04-15 21:33:31 -07:00
Max Brunsfeld
cad663b144
Consider multiple error repairs on the same path of the stack
...
This changes the API to the stack_iterate function so that you can pop
from the stack without stopping iteration
2016-04-15 21:28:00 -07:00
Max Brunsfeld
3778c63277
Clean up stack pop code
2016-04-11 23:12:50 -07:00
Max Brunsfeld
8bfaa5ffc3
Add directory argument to format script
2016-04-11 23:11:37 -07:00
Max Brunsfeld
9d87bc4517
Rename stack successors to links
2016-04-11 22:41:06 -07:00
Max Brunsfeld
695be5bc79
Merge equivalent stacks in a separate stage of parsing
...
* No more automatic merging every time a state is pushed to the stack
* When popping from the stack, the current version is always preserved
2016-04-10 14:12:24 -07:00
Max Brunsfeld
827573f1c7
Clean up reduce function
2016-04-07 10:40:33 -07:00
Max Brunsfeld
5ba40f15ad
Rename stack heads to versions
2016-04-04 12:25:57 -07:00
Max Brunsfeld
b1a696085a
Clean up stack pop functions
2016-04-04 11:59:10 -07:00
Max Brunsfeld
2f3e92c9be
Add function for popping all nodes from the stack
2016-04-04 11:44:45 -07:00
Max Brunsfeld
267092940d
Collapse redundant interior error nodes
2016-04-03 23:46:43 -07:00
Max Brunsfeld
eb47edb446
Add static function for stringifying nodes including hidden ones
2016-04-03 23:45:43 -07:00
Max Brunsfeld
849ecf0a13
Display pending stack links as dashed lines
2016-04-02 23:02:21 -07:00
Max Brunsfeld
91e3609fbf
Write to file directly from stack debugging function
2016-04-02 22:18:44 -07:00
Max Brunsfeld
d5c4dacb35
Clean up parser.c
2016-04-02 20:58:27 -07:00
Max Brunsfeld
956b3e68d7
Only store one reusable node, not one for each stack version
2016-04-01 21:17:23 -07:00
Max Brunsfeld
6bce6da1e6
Store verifying flag within parse stack
2016-03-31 12:03:21 -07:00
Max Brunsfeld
523923bd93
Ensure reduce only produces one slice when stopping at errors
2016-03-10 21:26:21 -08:00
