delta/cpython-git.git/Parser, branch fix-traceback-syntax-error

bpo-40334: Correctly identify invalid target in assignment errors (GH-20076)

2020-05-15T01:04:52+00:00

Co-authored-by: Lysandros Nikolaou

bpo-40618: Disallow invalid targets in augassign and except clauses (GH-20083)

2020-05-14T20:13:50+00:00

This commit fixes the new parser to disallow invalid targets in the
following scenarios:
- Augmented assignments must only accept a single target (Name,
  Attribute or Subscript), but no tuples or lists.
- `except` clauses should only accept a single `Name` as a target.

Co-authored-by: Pablo Galindo

bpo-40619: Correctly handle error lines in programs without file mode (GH-20090)

2020-05-14T20:11:48+00:00

bpo-40334: Always show the caret on SyntaxErrors (GH-20050)

2020-05-13T19:36:27+00:00

This commit fixes SyntaxError locations when the caret is not displayed,
by doing the following:

- `col_number` always gets set to the location of the offending
  node/expr. When no caret is to be displayed, this gets achieved
  by setting the object holding the error line to None.

- Introduce a new function `_PyPegen_raise_error_known_location`,
  which can be called, when an arbitrary `lineno`/`col_offset`
  needs to be passed. This function then gets used in the grammar
  (through some new macros and inline functions) so that SyntaxError
  locations of the new parser match that of the old.

bpo-40593: Improve syntax errors for invalid characters in source code. (GH-20033)

2020-05-12T09:42:04+00:00

bpo-40334: produce specialized errors for invalid del targets (GH-19911)

2020-05-11T21:53:58+00:00

bpo-40585: Normalize errors messages in codeop when comparing them (GH-20030)

2020-05-11T00:41:26+00:00

With the new parser, the error message contains always the trailing
newlines, causing the comparison of the repr of the error messages
in codeop to fail. This commit makes the new parser mirror the old parser's
behaviour regarding trailing newlines.

bpo-40334: Avoid collisions between parser variables and grammar variables (GH-19987)

2020-05-10T04:34:50+00:00

This is for the C generator:
- Disallow rule and variable names starting with `_`
- Rename most local variable names generated by the parser to start with `_`

Exceptions:
- Renaming `p` to `_p` will be a separate PR
- There are still some names that might clash, e.g.
  - anything starting with `Py`
  - C reserved words (`if` etc.)
  - Macros like `EXTRA` and `CHECK`

bpo-40502: Initialize n->n_col_offset (GH-19988)

2020-05-08T20:58:28+00:00

* initialize n->n_col_offset

* 📜🤖 Added by blurb_it.

* Move initialization

Co-authored-by: nanjekyejoannah 
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>

bpo-40555: Check for p->error_indicator in loop rules after the main loop is done (GH-19986)

2020-05-08T02:38:44+00:00