New features
- Lark can now parse in sections of strings, using
TextSlice, as a faster alternative to creating a "copy-slice" withs[i:j]. Learn more - Added support to
matchon Tree instances - When serializing a Lark instance, added the option to include the grammar object (before compilation).
- Added convenience method
Tree.find_token()
Bugfixes
- Bugfix of an edge case in Earley related to representation of ambiguity.
- Bugfixes in the standalone parser related to imports
- Bugfix in indenter - now dedents always contain line information
- Various small bugfixes (see PR list below)
Full list of PRs
- Docs: Rephrase v_args() documentation to underline it only applies to Transformer classes by @skepppy in #1458
- Tiny refactor for PR #1451 by @erezsh in #1459
- Earley: share nodes created by the scanner with the completer by @chanicpanic in #1451
- Better error in Lark.parse when using on_error when parser!=lalr (issue #1311) by @erezsh in #1460
- Fix
Symbol.__eq__to return false when comparing with None by @weaversam8 in #1481 - Mention internal/external transformers in the documentation by @odanoburu in #1486
- Add Tree.find_token() method by @makukha in #1467
- Type
Terminal.__init__by @Liam-DeVoe in #1503 - Add guidance on handling comments in languages with significant indentation by @nchammas in #1502
- [docs] Small fix for PR 1507 by @erezsh in #1508
- Add note on binding power of numeric quantifiers by @414owen in #1507
- Wrap functools.partial in staticmethod() to add compatibility with Python 3.14 by @hrnciar in #1483
- Fix generic type of Transformer_InPlaceRecursive by @lbhm in #1518
- Added TextSlice; Lark can now parse/lex a text-slice by @erezsh in #1452
- Support match on tree by @colmmurphyxyz in #1521
- Docs: Updated link of DSL article to a new version by @erezsh in #1529
- better error messages for shift/reduct conflicts by @skogsbaer in #1531
- Serialize Lark.grammar (fixes issue #1472) by @NasalDaemon in #1506
- Fixes for PR #1506, which adds the option to cache the grammar definition by @erezsh in #1540
- Bugfix in indenter - now always creating dedents with line information by @erezsh in #1547
- Bugfix: issue when unpickling in the standalone parser, due to lingering Token instances by @erezsh in #1553
- Include missing import in standalone parser by @pdeibert in #1541
- Version bump (1.3.0) by @erezsh in #1554
New Contributors
- @skepppy made their first contribution in #1458
- @weaversam8 made their first contribution in #1481
- @odanoburu made their first contribution in #1486
- @makukha made their first contribution in #1467
- @Liam-DeVoe made their first contribution in #1503
- @414owen made their first contribution in #1507
- @hrnciar made their first contribution in #1483
- @lbhm made their first contribution in #1518
- @colmmurphyxyz made their first contribution in #1521
- @skogsbaer made their first contribution in #1531
- @NasalDaemon made their first contribution in #1506
- @pdeibert made their first contribution in #1541
Full Changelog: 1.2.2...1.3.0