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* gh-122951: Simplify the grammar of the assignment rule (#124998)Rigel Di Scala2024-10-061-1584/+1525
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* gh-124889: Remove redundant artificial rules in PEG parser (#124893)efimov-mikhail2024-10-031-8512/+1671
| | | | | | | | | | | | Cache in C PEG-generator reworked: we save artificial rules in cache by Node string representation as a key instead of Node object itself. As a result total count of artificial rules in parsers.c is lowered from 283 to 170. More natural number ordering is used for the names of artificial rules. Auxiliary method CCallMakerVisitor._generate_artificial_rule_call is added. Its purpose is abstracting work with artificial rules cache. Explicit using of "is_repeat1" kwarg is added to visit_Repeat0 and visit_Repeat1 methods. Its slightly improve code readabitily.
* gh-123562: Improve `SyntaxError` message for `case ... as a.b` (#123563)sobolevn2024-09-021-8/+6
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* gh-123440: Improve error message for `except as` used with not a name (#123442)sobolevn2024-08-301-969/+1221
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* gh-120956: Avoid comparison of int to Py_ssize_t in parser (#120959)Lysandros Nikolaou2024-06-241-116/+116
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* gh-119724: Revert "bpo-45759: Better error messages for non-matching ↵Petr Viktorin2024-06-041-548/+450
| | | | | | 'elif'/'else' statements (#29513)" (#119974) This reverts commit 1c8f912ebdfdb146cd7dd2d7a3a67d2c5045ddb0.
* gh-118235: Move RAISE_SYNTAX_ERROR actions to invalid rules and make sure ↵Petr Viktorin2024-05-301-1416/+1538
| | | | | | | | they stay there (GH-119731) The Full Grammar specification in the docs omits rule actions, so grammar rules that raise a syntax error looked like valid syntax. This was solved in ef940de by hiding those rules in the custom syntax highlighter. This moves all syntax-error alternatives to invalid rules, adds a validator that ensures that actions containing RAISE_SYNTAX_ERROR are in invalid rules, and reverts the syntax highlighter hack.
* gh-118090: Improve error message for empty type param brackets (GH-118091)Nikita Sobolev2024-05-071-797/+962
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* gh-116126: Implement PEP 696 (#116129)Jelle Zijlstra2024-05-031-443/+548
| | | | | Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com> Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com> Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
* gh-116988: Remove duplicates of `annotated_rhs` in the Grammar (#117004)David Rubin2024-04-241-2091/+1560
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* gh-118082: Improve `import` without names syntax error message (#118083)Nikita Sobolev2024-04-231-149/+200
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* gh-109120: Fix syntax error in handlinh of incorrect star expressions (#117444)Grigoriev Semyon2024-04-021-1230/+1417
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* bpo-24612: Improve syntax error for 'not' after an operator (GH-28170)Pablo Galindo Salgado2024-03-261-594/+970
| | | Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
* gh-115881: Ensure `ast.parse()` parses conditional context managers even ↵Alex Waygood2024-02-261-1/+1
| | | | with low `feature_version` passed (#115920)
* gh-111488: Changed error message in case of no 'in' keyword after 'for' in ↵Grigoriev Semyon2024-01-061-1592/+1785
| | | | cmp (#113656)
* bpo-45759: Better error messages for non-matching 'elif'/'else' statements ↵Crowthebird2023-11-201-435/+533
| | | | (#29513)
* GH-111807: Lower the parser stack depth under WASI debug builds (#112225)Brett Cannon2023-11-201-1/+5
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* gh-111420: Allow type comments in parenthesized `with` statements (#111468)Tomas R2023-10-311-6/+9
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* gh-110938: Fix error messages for indented blocks with functions and classes ↵Pablo Galindo Salgado2023-10-171-19/+31
| | | | with generic type parameters (#110973)
* gh-110696: Fix incorrect syntax error message for incorrect argument ↵Pablo Galindo Salgado2023-10-121-1133/+1485
| | | | unpacking (#110706)
* gh-109596: Ensure repeated rules in the grammar are not allowed and fix ↵Pablo Galindo Salgado2023-09-221-1182/+1180
| | | | incorrect soft keywords (#109606)
* gh-109114: Relax the check for invalid lambdas inside f-strings to avoid ↵Pablo Galindo Salgado2023-09-081-1124/+1065
| | | | false positives (#109121)
* gh-108179: Add error message for parser stack overflows (#108256)Dennis Sweeney2023-08-221-1060/+530
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* gh-107015: Remove async_hacks from the tokenizer (#107018)Pablo Galindo Salgado2023-07-261-311/+313
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* gh-98931: Add custom error messages to invalid import/from with multiple ↵Pablo Galindo Salgado2023-06-221-596/+719
| | | | | | targets (#105985) Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
* gh-105194: Fix format specifier escaped characters in f-strings (#105231)Pablo Galindo Salgado2023-06-021-1/+1
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* gh-104799: Move location of type_params AST fields (#104828)Jelle Zijlstra2023-05-261-3/+3
| | | Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
* gh-104656: Rename typeparams AST node to type_params (#104657)Jelle Zijlstra2023-05-221-15/+15
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* gh-103763: Implement PEP 695 (#103764)Jelle Zijlstra2023-05-161-1958/+2557
| | | | | | | | | | | | | | This implements PEP 695, Type Parameter Syntax. It adds support for: - Generic functions (def func[T](): ...) - Generic classes (class X[T](): ...) - Type aliases (type X = ...) - New scoping when the new syntax is used within a class body - Compiler and interpreter changes to support the new syntax and scoping rules Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com> Co-authored-by: Eric Traut <eric@traut.com> Co-authored-by: Larry Hastings <larry@hastings.org> Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
* gh-103656: Transfer f-string buffers to parser to avoid use-after-free ↵Lysandros Nikolaou2023-04-271-12/+12
| | | | | (GH-103896) Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* gh-102856: Initial implementation of PEP 701 (#102855)Pablo Galindo Salgado2023-04-191-2434/+4636
| | | | | | Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com> Co-authored-by: Batuhan Taskaya <isidentical@gmail.com> Co-authored-by: Marta Gómez Macías <mgmacias@google.com> Co-authored-by: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>
* gh-102416: Do not memoize incorrectly loop rules in the parser (#102467)Pablo Galindo Salgado2023-03-061-216/+0
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* gh-101046: Fix a potential memory leak in the parser when raising ↵Pablo Galindo Salgado2023-01-161-0/+108
| | | | MemoryError (#101051)
* gh-90994: Improve error messages upon call arguments syntax errors (GH-96893)Lysandros Nikolaou2022-11-201-1149/+1395
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* gh-99211: Point to except/except* on syntax errors when mixing them (GH-99215)Lysandros Nikolaou2022-11-201-671/+713
| | | Automerge-Triggered-By: GH:lysnikolaou
* gh-99153: set location on SyntaxError for try with both except and except* ↵Irit Katriel2022-11-061-3/+3
| | | | (GH-99160)
* gh-98931: Improve error message when the user types 'import x from y' ↵Pablo Galindo Salgado2022-11-011-391/+465
| | | | instead of 'from y import x' (#98932)
* gh-91210: Improve error message when non-default param follows default ↵Lysandros Nikolaou2022-09-171-345/+353
| | | | | | (GH-95933) - Improve error message when parameter without a default follows one with a default - Show same error message when positional-only params precede the default/non-default sequence
* gh-96587: Raise `SyntaxError` for PEP654 on older `feature_version` (#96588)Nikita Sobolev2022-09-051-1/+1
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* gh-94996: Disallow lambda pos only params with feature_version < (3, 8) ↵Shantanu2022-08-121-2/+2
| | | | (GH-95934)
* gh-94996: Disallow parsing pos only params with feature_version < (3, 8) ↵Shantanu2022-08-121-2/+2
| | | | (GH-94997)
* gh-94949: Disallow parsing parenthesised ctx mgr with old feature_version ↵Shantanu2022-07-181-1/+1
| | | | | | | | | | | (#94950) * gh-94949: Disallow parsing parenthesised ctx manager with old feature_version * 📜🤖 Added by blurb_it. * Allow it with feature_version=(3, 9) as well Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
* gh-94947: Disallow parsing walrus with feature_version < (3, 8) (#94948)Shantanu2022-07-181-1/+1
| | | | | | | | | * gh-94947: Disallow parsing walrus with feature_version < (3, 8) * oops, commit the parser * 📜🤖 Added by blurb_it. Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
* gh-94192: Fix error for dictionary literals with invalid expression as ↵wookie1842022-06-261-261/+326
| | | | | | | value. (#94304) * Fix error for dictionary literals with invalid expression as value. * Remove trailing whitespace
* gh-92858: Improve error message for some suites with syntax error before ':' ↵wookie1842022-06-231-362/+500
| | | | (#92894)
* gh-93671: Avoid exponential backtracking in deeply nested sequence patterns ↵Pablo Galindo Salgado2022-06-101-0/+10
| | | | | in match statements (GH-93680) Co-authored-by: Łukasz Langa <lukasz@langa.pl>
* gh-93103: Parser uses PyConfig.parser_debug instead of Py_DebugFlag (#93106)Victor Stinner2022-05-241-1/+1
| | | | | | | * Replace deprecated Py_DebugFlag with PyConfig.parser_debug in the parser. * Add Parser.debug member. * Add tok_state.debug member. * Py_FrozenMain(): Replace Py_VerboseFlag with PyConfig.verbose.
* gh-90473: Decrease recursion limit and skip tests on WASI (GH-92803)Christian Heimes2022-05-191-1/+5
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* bpo-47212: Improve error messages for un-parenthesized generator expressions ↵Matthieu Dartiailh2022-04-051-3/+3
| | | | (GH-32302)
* bpo-43224: Implement PEP 646 grammar changes (GH-31018)Matthew Rahtz2022-03-261-2101/+2465
| | | Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
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