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Author SHA1 Message Date
Jarry Shaw 84874aace3 Revision on fstring issues (#100) 
* f-string expression part cannot include a backslash
 * failing example `f"{'\n'}"` for tests
 2020-01-09 21:49:34 +01:00
Jarry Shaw 55531ab65b Revision on assignment errors (#97) 
* Revision on assignment expression errors

 * added rule for __debug__ (should be a keyword)
 * reviewed error messages
 * added new failing samples

* Adjustment upon Dave's review

 * rewind several changes in assignment errors
 * patched is_definition: command not found for assignment expressions
 * patched Python 2 inconsistent error messages in test_python_errors.py: command not found
 2020-01-08 23:07:37 +01:00
Jarry Shaw 89c4d959e9 * moved all namedexpr_test related rules to _NamedExprRule 
* added valid examples
 2019-12-14 09:37:16 +01:00
Jarry Shaw 776e151370 Revised implementation 
* search ancestors of namedexpr_test directly for comprehensions
 * added test samples for invalid namedexpr_test syntax
 2019-12-13 11:55:53 +08:00
Jarry Shaw 76fe4792e7 Deal with nested comprehension 
e.g. `[i for i, j in range(5) for k in range (10) if True or (i := 1)]`
 2019-12-01 16:23:18 +08:00
Jarry Shaw 8cae7ed526 Fixing davidhalter/parso#89 
[all changes are in parso/python/errors.py]

* utility function (`_get_namedexpr`) extracting all assignment expression (`namedexpr_test`) nodes
* add `is_namedexpr` parameter to `_CheckAssignmentRule._check_assignment` and special error message for assignment expression related assignment issues (*cannot use named assignment with xxx*)
* add assignment expression check to `_CompForRule` (*assignment expression cannot be used in a comprehension iterable expression*)
* add `_NamedExprRule` for special assignment expression checks
  - *cannot use named assignment with lambda*
  - *cannot use named assignment with subscript*
  - *cannot use named assignment with attribute*
  - and fallback general checks in `_CheckAssignmentRule._check_assignment`
* add `_ComprehensionRule` for special checks on assignment expression in a comprehension
  - *assignment expression within a comprehension cannot be used in a class body*
  - *assignment expression cannot rebind comprehension iteration variable 'xxx'*
 2019-12-01 15:43:17 +08:00