traxys/tree-sitter
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1818 commits 16 branches 98 tags 37 MiB
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382 commits

Author SHA1 Message Date
Max Brunsfeld
5520983144 Clean up Stack API 
* Remove StackPopResult
* Rename top_state() -> state()
* Rename top_position() -> position()
* Improve docs
 2018-03-29 17:37:54 -07:00
Max Brunsfeld
ee995c3d6b Avoid redundant retains/releases by giving ts_stack_push move semantics 2018-03-29 17:18:43 -07:00
Max Brunsfeld
e917756ad1 Remove depends_on_lookahead field from parse table entries 
This simplifies the logic for determining whether a token is reusable
and makes it more conservative. It should fix some incremental parsing
bugs that are being caught by the randomized tests on CI.
 2018-03-28 10:58:33 -07:00
Max Brunsfeld
e927d02f43 Allow reusing leaf nodes unless the next leaf has changes 2018-03-07 17:44:54 -08:00
Max Brunsfeld
c0cc35ff07 Create separate lexer function for keywords 2018-03-07 12:00:26 -08:00
Max Brunsfeld
f96969738b Don't remove mergeable stack versions so aggressively during condense 2018-03-05 10:40:05 -08:00
Max Brunsfeld
dbc0c208f4 Add missing initialization of parser's in_ambiguity state 2018-03-02 15:25:39 -08:00
Max Brunsfeld
52087de4f0 Remove the concept of fragile reductions 
They were a vestige of when Tree-sitter did sentential form-based
incremental parsing (as opposed to simply state matching). This was
elegant but not compatible with GLR as far as I could tell.
 2018-03-02 14:51:54 -08:00
Max Brunsfeld
299a146b66 Balance repetition trees after parsing 2018-02-12 11:41:56 -08:00
Max Brunsfeld
8c29841adf Represent repetitions with associative structure 2018-02-12 11:41:56 -08:00
Max Brunsfeld
46dcd53090 Do not insert missing tokens if halt_on_error option is passed 2018-01-24 14:04:55 -08:00
Max Brunsfeld
dafa897021 Bail on error recovery if too many alternative parses have already completed 2018-01-09 17:08:36 -08:00
Max Brunsfeld
21a88b1731 Don't count less-far-along versions in better_version_exists method 2017-12-29 16:10:43 -08:00
Max Brunsfeld
d3c85f288d Start work on repairing errors by inserting missing tokens 2017-12-29 15:11:00 -08:00
Max Brunsfeld
f2dc620610 Extract parser__recover_to_state method 2017-12-29 15:10:59 -08:00
Max Brunsfeld
adf47e2b57 Fix invalid usage of 'extra' field on non-shift parse action 2017-12-29 11:46:41 -08:00
Max Brunsfeld
d9094e8146 Consolidate more logic into do_potential_reductions method 2017-12-28 15:49:48 -08:00
Max Brunsfeld
172cbb2d22 Fix infinite loop due to skipping empty tokens during error recovery 2017-12-27 11:18:06 -08:00
Max Brunsfeld
addeb6c4c1 Allocate and free trees using an object pool 2017-12-27 10:34:29 -08:00
Max Brunsfeld
0e69da37a5 Return a character count from the lexer's get_column method 2017-12-20 16:26:38 -08:00
Max Brunsfeld
fbcefe25f7 Avoid creating external tokens that start after they end 2017-12-07 11:50:27 -08:00
Max Brunsfeld
5d676de051 Remove unnecessary conditional in parser__accept 2017-12-07 11:50:27 -08:00
Max Brunsfeld
48681c3f0e Initialize error start and end positions at their declarations 
Fixes #113

Clang doesn't seem to be able to tell that these variables were guaranteed to
be initialized by the time they were read.
 2017-10-31 10:06:44 -07:00
Max Brunsfeld
121a6a66ec Take total dynamic precedence into account in stack version sorting 
Signed-off-by: Josh Vera <vera@github.com>
 2017-10-09 15:51:22 -07:00
Max Brunsfeld
36c2b685b9 Always invalidate old chunk of text when parsing after an edit 2017-10-04 15:09:46 -07:00
Max Brunsfeld
b0fdc33f73 Remove 'extra' and 'structural' booleans from symbol metadata 2017-09-14 12:07:46 -07:00
Max Brunsfeld
91456d7a17 Avoid duplicate error state entries for tokens that are both internal & external 2017-09-14 10:54:13 -07:00
Max Brunsfeld
2721f72c41 Represent MAX_COST_DIFFERENCE as unsigned 2017-09-13 16:49:18 -07:00
Max Brunsfeld
c1cf8e02a7 Merge pull request #101 from tree-sitter/merge-more-lex-states 
Reduce the number of states in the generated lexer function
 2017-09-13 16:46:58 -07:00
Max Brunsfeld
d291af9a31 Refactor error comparisons 
* Deal with mergeability outside of error comparison function
* Make `better_version_exists` function pure (don't halt other versions
as a side effect).
* Tweak error comparison logic

Signed-off-by: Rick Winfrey <rewinfrey@github.com>
 2017-09-13 16:38:15 -07:00
Max Brunsfeld
07fb3ab0e6 Abort recoveries before popping if better versions already exist 2017-09-13 09:56:51 -07:00
Max Brunsfeld
47669e6015 Avoid halting the only non-halted entry in recover 2017-09-12 16:20:06 -07:00
Max Brunsfeld
819235bac3 Limit the number of stack nodes that are included in a summary 2017-09-12 12:00:00 -07:00
Max Brunsfeld
99d048e016 Simplify error recovery; eliminate recovery states 
The previous approach to error recovery relied on special error-recovery
states in the parse table. For each token T, there was an error recovery
state in which the parser looked for *any* token that could follow T.
Unfortunately, sometimes the set of tokens that could follow T contained
conflicts. For example, in JS, the token '}' can be followed by the
open-ended 'template_chars' token, but also by ordinary tokens like
'identifier'. So with the old algorithm, when recovering from an
unexpected '}' token, the lexer had no way to distinguish identifiers
from template_chars.

This commit drops the error recovery states. Instead, when we encounter
an unexpected token T, we recover from the error by finding a previous
state S in the stack in which T would be valid, popping all of the nodes
after S, and wrapping them in an error.

This way, the lexer is always invoked in a normal parse state, in which
it is looking for a non-conflicting set of tokens. Eliminating the error
recovery states also shrinks the lex state machine significantly.

Signed-off-by: Rick Winfrey <rewinfrey@github.com>
 2017-09-11 15:22:52 -07:00
Max Brunsfeld
4c9c05806a Merge compatible starting token states before constructing lex table 2017-09-05 13:21:53 -07:00
Max Brunsfeld
ac9d260734 Clean up parser fields 2017-08-31 12:50:10 -07:00
Max Brunsfeld
4a0587061e Consolidate logic for deciding on a lookahead node 2017-08-31 12:19:37 -07:00
Max Brunsfeld
41074cbf2d 🎨 2017-08-30 16:48:15 -07:00
Max Brunsfeld
fdc6ee445b Remove parser__push helper function 2017-08-30 16:41:07 -07:00
Max Brunsfeld
1b1276bdbf Simplify parser__condense_stack function 2017-08-30 16:36:02 -07:00
Max Brunsfeld
96a630e5df Clean up check for leaf node reusability 2017-08-30 16:19:51 -07:00
Max Brunsfeld
8bdab7335e Remove unnecessary reusability check after breaking down lookahead 2017-08-30 16:19:11 -07:00
Max Brunsfeld
bef536a7d0 Discard fragile reusable nodes earlier 2017-08-30 16:17:10 -07:00
Max Brunsfeld
5cbd50c7d7 Remember how far ahead the lexer looked on failed calls 
This needs to be included in the 'bytes_scanned' property of the token
that is ultimately produced.
 2017-08-29 15:04:22 -07:00
Max Brunsfeld
f3977ec213 Always call deserialize on external scanner before scanning 
Remembering the last token that the external scanner produced is
not worth the complexity.
 2017-08-29 14:41:55 -07:00
Max Brunsfeld
4d63e26e9e Clean up logic for falling back to error mode after lexing fails 2017-08-25 16:57:09 -07:00
Max Brunsfeld
86d5737fc2 Escape quotes when printing symbols to dot graphs 2017-08-25 16:26:40 -07:00
Max Brunsfeld
1dca3a0b58 Simplify parse version reordering 2017-08-04 14:51:14 -07:00
Max Brunsfeld
9260d8163c Refactor and fix bugs in tree comparison algorithm 2017-08-04 14:03:41 -07:00
Max Brunsfeld
09f4796f6b Get tests passing w/ new alias API 2017-08-01 14:35:34 -07:00