traxys/tree-sitter
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
1729 commits 16 branches 98 tags 37 MiB
Commit graph

1183 commits

Author SHA1 Message Date
Max Brunsfeld
172cbb2d22 Fix infinite loop due to skipping empty tokens during error recovery 2017-12-27 11:18:06 -08:00
Max Brunsfeld
2625c3a96c Remove dead code in string_input.c 2017-12-27 10:34:29 -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
fcff16cb86 Add get_column method to lexer 2017-12-19 17:54:15 -08:00
Max Brunsfeld
532bbeca0d Remove wrong handling of \a in a regex 2017-12-12 16:50:53 -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
493db39363 Never move the start rule of a grammar into the lexical grammar 
This preserves a useful invariant that the root node of the AST is never
a token.
 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
9f24118b17 Include trees' dynamic precedence in debug graphs 2017-10-04 10:41:20 -07:00
Max Brunsfeld
ba607a1f84 Optimize lex state merging 2017-09-18 13:40:37 -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
71595ffde6 Only allow one stack link with a given type containing errors 2017-09-13 10:05:31 -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
ee2906ac2e Don't merge stack versions that are halted 2017-09-12 16:19:28 -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
9d668c5004 Move incompatible token map into LexTableBuilder 2017-08-31 15:46:37 -07:00
Max Brunsfeld
f8649824fa Remove unused function 2017-08-31 15:30:44 -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
c285fbef38 Clear LexTableBuilder's state after detecting conflicts 2017-08-25 17:11:39 -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
573b5f3671 Pass LexTableBuilder to ParseTableBuilder 2017-08-25 15:57:50 -07:00
Max Brunsfeld
eace426129 Suppress unknown pragma warnings in MSVC 2017-08-09 10:14:05 -07:00
Max Brunsfeld
9d649f3382 Remove depth-based error-recovery pruning criteria 
This code was causing ambiguities to get resolved differently depending on
whether there was an unrelated error on the stack or not.
 2017-08-09 09:53:41 -07:00
Max Brunsfeld
964dd16812 Avoid unicode escape sequences when generating conflict messages 2017-08-09 09:32:58 -07:00
Max Brunsfeld
5f40adb70c Recur to sub-rules in a deterministic order in expand_repeats 2017-08-08 17:20:04 -07:00
Max Brunsfeld
e6b43700b9 Get generated parsers compiling and loading properly on windows 2017-08-08 16:47:51 -07:00
Max Brunsfeld
9d616b3bf8 Replace size_t -> LexStateId in LexTableBuilder::remove_duplicate_states 2017-08-08 12:55:35 -07:00
Max Brunsfeld
3d351eac09 Fix some C code that MSVC doesn't like 2017-08-08 10:47:59 -07:00
Max Brunsfeld
12623deb19 Avoid struct literal syntax in point functions 2017-08-08 10:42:21 -07:00