…tterns in match statements (GH-93680)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>

…essions (GH-32302)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

…rors (GH-31241)

One typo fix and one heading change, both in comments. No functional changes.

… if inside parentheses (GH-29757)

…H-29427)

to achieve this, change the grammar to expect the '(' token after 'def' NAME.

Automerge-Triggered-By: GH:pablogsal

…ywords in a call (GH-29413)

…move unused imports (GH-29393)


Co-authored-by: Wim Glenn <wglenn@jumptrading.com>

…erator expression in function calls (GH-28576)

…ements (GH-27814)

…ns (GH-27615)

…print syntax errors (GH-27521)

…the parser (GH-27392)

…27389)

…l patterns (GH-26793)

…26632)

Automerge-Triggered-By: GH:lysnikolaou

…lly (GH-26523)

…H-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.

…invalid expressions (GH-26210)

…pes (GH-25996)

Automerge-Triggered-By: GH:pablogsal

…H-25735)

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

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

…H-25431)

…iterals (GH-25427)