languages/cpython
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89 Commits

Author SHA1 Message Date
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
Pablo Galindo
8efad61963
bpo-41064: Improve syntax error for invalid usage of '**' in f-strings (GH-25006) 2021-03-24 19:34:17 +00:00
Pablo Galindo
08fb8ac99a
bpo-42128: Add 'missing :' syntax error message to match statements (GH-24733) 2021-03-18 01:03:11 +00:00
Brandt Bucher
145bf269df
bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917) 
Co-authored-by: Guido van Rossum <guido@python.org>
Co-authored-by: Talin <viridia@gmail.com>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
 2021-02-26 14:51:55 -08:00
Pablo Galindo
206cbdab16
bpo-43149: Improve error message for exception group without parentheses (GH-24467) 2021-02-07 18:42:21 +00:00
Pablo Galindo
d4e6ed7e5f
bpo-43121: Fix incorrect SyntaxError message for missing comma (GH-24436) 2021-02-03 23:29:26 +00:00
Pablo Galindo
58fb156edd
bpo-42997: Improve error message for missing : before suites (GH-24292) 
* Add to the peg generator a new directive ('&&') that allows to expect
  a token and hard fail the parsing if the token is not found. This
  allows to quickly emmit syntax errors for missing tokens.

* Use the new grammar element to hard-fail if the ':' is missing before
  suites.
 2021-02-02 19:54:22 +00:00
Pablo Galindo
835f14ff8e
bpo-43017: Improve error message for unparenthesised tuples in comprehensions (GH24314) 2021-01-31 22:52:56 +00:00
Lysandros Nikolaou
07dcd86cee
bpo-42860: Remove type error from grammar (GH-24156) 
This is only there so that alternative implementations written in statically-typed languages can use this grammar without
having type errors in the way.

Automerge-Triggered-By: GH:lysnikolaou
 2021-01-07 14:31:25 -08:00
Lysandros Nikolaou
2ea320dddd
bpo-40631: Disallow single parenthesized star target (GH-24027) 2021-01-03 01:14:21 +02:00
Pablo Galindo
43c4fb6c90
bpo-30858: Improve error location for expressions with assignments (GH-23753) 
Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
 2020-12-13 16:46:48 +00:00
Pablo Galindo
9bdc40ee3e
Refactor the grammar to match the language specification docs (GH-23574) 2020-11-30 19:42:38 +00:00