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239 commits

Author SHA1 Message Date
Lysandros Nikolaou 7e36abbb78
gh-91210: Improve error message when non-default param follows default (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
 2022-09-17 10:09:28 -07:00
Nikita Sobolev 2c7d2e8d46
gh-96587: Raise SyntaxError for PEP654 on older feature_version (#96588) 2022-09-05 17:54:09 +01:00
Shantanu a965db37f2
gh-94996: Disallow lambda pos only params with feature_version < (3, 8) (GH-95934) 2022-08-12 20:41:02 +02:00
Shantanu b5e3ea2862
gh-94996: Disallow parsing pos only params with feature_version < (3, 8) (GH-94997) 2022-08-12 19:27:50 +02:00
Shantanu 0daba82221
gh-94949: Disallow parsing parenthesised ctx mgr with old feature_version (#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>
 2022-07-18 22:10:49 +01:00
Shantanu ae0be5a53b
gh-94947: Disallow parsing walrus with feature_version < (3, 8) (#94948) 
* 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>
 2022-07-18 10:20:12 +01:00
wookie184 8c237a7a71
gh-94192: Fix error for dictionary literals with invalid expression as value. (#94304) 
* Fix error for dictionary literals with invalid expression as value.

* Remove trailing whitespace
 2022-06-26 19:42:47 +01:00
wookie184 2fc83ac3af
gh-92858: Improve error message for some suites with syntax error before ':' (#92894) 2022-06-23 17:31:09 +01:00
Pablo Galindo Salgado 53a8b17895
gh-93671: Avoid exponential backtracking in deeply nested sequence patterns in match statements (GH-93680) 
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
 2022-06-10 17:56:45 +02:00
Matthieu Dartiailh aa0f056a00
bpo-47212: Improve error messages for un-parenthesized generator expressions (GH-32302) 2022-04-05 14:47:13 +01:00
Matthew Rahtz e8e737bcf6
bpo-43224: Implement PEP 646 grammar changes (GH-31018) 
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
 2022-03-26 09:55:35 -07:00
Pablo Galindo Salgado 7d810b6a4e
bpo-46838: Syntax error improvements for function definitions (GH-31590) 2022-03-22 11:38:41 +00:00
Pablo Galindo Salgado 390459de6d
Allow the parser to avoid nested processing of invalid rules (GH-31252) 2022-02-10 13:12:14 +00:00
Pablo Galindo Salgado b71dc71905
bpo-46707: Avoid potential exponential backtracking in some syntax errors (GH-31241) 2022-02-10 03:37:17 +00:00
Mark Dickinson 1bee9a4625
bpo-46272: Fix two heading comments in python.gram (GH-30499) 
One typo fix and one heading change, both in comments. No functional changes.
 2022-01-09 08:22:54 -08:00
Irit Katriel d60457a667
bpo-45292: [PEP-654] add except* (GH-29581) 2021-12-14 16:48:15 +00:00
Pablo Galindo Salgado 24c10d2943
bpo-45727: Only trigger the 'did you forgot a comma' error suggestion if inside parentheses (GH-29757) 2021-11-24 22:21:23 +00:00
Pablo Galindo Salgado 7a1d932528
bpo-45450: Improve syntax error for parenthesized arguments (GH-28906) 2021-11-20 18:27:40 +00:00
Pablo Galindo Salgado 546cefcda7
bpo-45727: Make the syntax error for missing comma more consistent (GH-29427) 2021-11-19 23:11:57 +00:00
Carl Friedrich Bolz-Tereick 2819e98d10
bpo-45764: improve error message when missing '(' after 'def' (GH-29484) 
to achieve this, change the grammar to expect the '(' token after 'def' NAME.

Automerge-Triggered-By: GH:pablogsal
 2021-11-09 06:03:32 -08:00
Pablo Galindo Salgado e2d65630f3
bpo-45716: Improve the error message when using True/False/None as keywords in a call (GH-29413) 2021-11-05 13:54:55 +00:00
wim glenn 762173c670
bpo-44257: fix "assigment_expr" typo + regenerate the grammar, and remove unused imports (GH-29393) 
Co-authored-by: Wim Glenn <wglenn@jumptrading.com>
 2021-11-03 20:57:40 +00:00
Pablo Galindo Salgado e5f13ce5b4
bpo-43914: Correctly highlight SyntaxError exceptions for invalid generator expression in function calls (GH-28576) 2021-09-27 14:37:43 +01:00
Pablo Galindo Salgado b2f68b1900
bpo-44947: Refine the syntax error for trailing commas in import statements (GH-27814) 2021-08-18 22:09:21 +02:00
Pablo Galindo Salgado f5cbea6b1b
bpo-44838: Refine the custom syntax errors for invalid 'if' expressions (GH-27615) 2021-08-05 18:28:57 +01:00
Miguel Brito 28b6dc9dd5
bpo-44792: Improve syntax errors for if expressions (GH-27506) 2021-08-02 18:11:37 +01:00
Pablo Galindo Salgado 208a7e957b
bpo-34013: Don't consider a grouped expression when reporting legacy print syntax errors (GH-27521) 2021-08-01 02:10:50 +01:00
Pablo Galindo Salgado 302cf35505
Divide the grammar into sections to improve readability (GH-27502) 2021-07-31 13:04:37 +01:00
Pablo Galindo Salgado ecc3c8e421
bpo-34013: Move the Python 2 hints from the exception constructor to the parser (GH-27392) 2021-07-27 21:30:32 +01:00
Pablo Galindo Salgado 6948964ecf
bpo-34013: Generalize the invalid legacy statement error message (GH-27389) 2021-07-27 17:19:22 +01:00
Pablo Galindo Salgado a283ef116b
Remove unnecessary 'invalid_primary' rule in the parser (GH-27186) 2021-07-16 13:20:09 +01:00
Pablo Galindo 0acc258fe6
bpo-44456: Improve the syntax error when mixing keyword and positional patterns (GH-26793) 2021-06-24 16:09:57 +01:00
Pablo Galindo 05073036dc
bpo-44368: Improve syntax errors with invalid as pattern targets (GH-26632) 2021-06-10 23:50:32 +01:00
Lysandros Nikolaou e7b4644607
bpo-44385: Remove unused grammar rules (GH-26655) 
Automerge-Triggered-By: GH:lysnikolaou
 2021-06-10 15:05:06 -07:00
Pablo Galindo b250f89bb7
bpo-44305: Improve syntax error for try blocks without except or finally (GH-26523) 2021-06-03 23:52:12 +01:00
Pablo Galindo c878a97968
bpo-44180: Fix edge cases in invalid assigment rules in the parser (GH-26283) 
The invalid assignment rules are very delicate since the parser can
easily raise an invalid assignment when a keyword argument is provided.
As they are very deep into the grammar tree, is very difficult to
specify in which contexts these rules can be used and in which don't.
For that, we need to use a different version of the rule that doesn't do
error checking in those situations where we don't want the rule to raise
(keyword arguments and generator expressions).

We also need to check if we are in left-recursive rule, as those can try
to eagerly advance the parser even if the parse will fail at the end of
the expression. Failing to do this allows the parser to start parsing a
call as a tuple and incorrectly identify a keyword argument as an
invalid assignment, before it realizes that it was not a tuple after all.
 2021-05-21 18:34:54 +01:00
Pablo Galindo 33c0c90dea
bpo-44168: Fix error message in the parser for keyword arguments for invalid expressions (GH-26210) 2021-05-19 19:03:04 +01:00
Pablo Galindo 6692dc1ca9
bpo-43149: Correct the syntax error message for multiple exception types (GH-25996) 
Automerge-Triggered-By: GH:pablogsal
 2021-05-08 11:24:41 -07:00
Brandt Bucher dbe60ee09d
bpo-43892: Validate the first term of complex literal value patterns (GH-25735) 2021-04-29 17:19:28 -07:00
Nick Coghlan 1e7b858575
bpo-43892: Make match patterns explicit in the AST (GH-25585) 
Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>
 2021-04-28 22:58:44 -07:00
Pablo Galindo a77aac4fca
bpo-43914: Highlight invalid ranges in SyntaxErrors (#25525) 
To improve the user experience understanding what part of the error messages associated with SyntaxErrors is wrong, we can highlight the whole error range and not only place the caret at the first character. In this way:

>>> foo(x, z for z in range(10), t, w)
  File "<stdin>", line 1
    foo(x, z for z in range(10), t, w)
           ^
SyntaxError: Generator expression must be parenthesized

becomes

>>> foo(x, z for z in range(10), t, w)
  File "<stdin>", line 1
    foo(x, z for z in range(10), t, w)
           ^^^^^^^^^^^^^^^^^^^^
SyntaxError: Generator expression must be parenthesized
 2021-04-23 14:27:05 +01:00
Pablo Galindo 56c95dfe27
bpo-43859: Improve the error message for IndentationError exceptions (GH-25431) 2021-04-21 15:28:21 +01:00
Pablo Galindo b5b98bd8f8
bpo-43823: Fix location of one of the errors for invalid dictionary literals (GH-25427) 2021-04-16 00:45:42 +01:00
Pablo Galindo b280248be8
bpo-43822: Improve syntax errors for missing commas (GH-25377) 2021-04-15 21:38:45 +01:00
Pablo Galindo da74350174
bpo-43823: Improve syntax errors for invalid dictionary literals (GH-25378) 2021-04-15 14:06:39 +01:00
Pablo Galindo 30ed93bfec
bpo-43797: Handle correctly invalid assignments inside function calls and generators (GH-25390) 2021-04-13 17:51:21 +01:00
Pablo Galindo d9151cb453
Ensure that early = are not matched by the parser as invalid comparisons (GH-25375) 2021-04-13 02:32:33 +01:00
Pablo Galindo b86ed8e3bb
bpo-43797: Improve syntax error for invalid comparisons (#25317) 
* bpo-43797: Improve syntax error for invalid comparisons

* Update Lib/test/test_fstring.py

Co-authored-by: Guido van Rossum <gvanrossum@gmail.com>

* Apply review comments

* can't -> cannot

Co-authored-by: Guido van Rossum <gvanrossum@gmail.com>
 2021-04-12 16:59:30 +01:00
Matthew Suozzo 75a06f067b
bpo-43798: Add source location attributes to alias (GH-25324) 
* Add source location attributes to alias.
* Move alias star construction to pegen helper.

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
 2021-04-10 22:56:28 +02:00
Victor Stinner d27f8d2e07
bpo-43244: Rename pycore_ast.h functions to _PyAST_xxx() (GH-25252) 
Rename AST functions of pycore_ast.h to use the "_PyAST_" prefix.
Remove macros creating aliases without prefix. For example, Module()
becomes _PyAST_Module(). Update Grammar/python.gram to use
_PyAST_xxx() functions.
 2021-04-07 21:34:22 +02:00