mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-24 19:54:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-44456: Improve the syntax error when mixing keyword and positional patterns (GH-26793)

Browse source 
(cherry picked from commit 0acc258fe6)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
This commit is contained in:
Miss Islington (bot) 2021-06-24 08:34:28 -07:00 • committed by GitHub
parent b3fac2926b
commit 11f1a30cdb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
6 changed files with 843 additions and 635 deletions
Download patch file Download diff file Expand all files Collapse all files

8
Grammar/python.gram
View file

@ -380,6 +380,7 @@ class_pattern[pattern_ty]:
CHECK(asdl_expr_seq*, _PyPegen_get_pattern_keys(p, keywords)))),
CHECK(asdl_pattern_seq*, _PyPegen_get_patterns(p, keywords)),
EXTRA) }
| invalid_class_pattern
positional_patterns[asdl_pattern_seq*]:
| args[asdl_pattern_seq*]=','.pattern+ { args }
keyword_patterns[asdl_seq*]:
@ -978,6 +979,13 @@ invalid_case_block:
invalid_as_pattern:
| or_pattern 'as' a="_" { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "cannot use '_' as a target") }
| or_pattern 'as' !NAME a=expression { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "invalid pattern target") }
invalid_class_pattern:
| name_or_attr '(' a=invalid_class_argument_pattern { RAISE_SYNTAX_ERROR_KNOWN_RANGE(
PyPegen_first_item(a, pattern_ty),
PyPegen_last_item(a, pattern_ty),
"positional patterns follow keyword patterns") }
invalid_class_argument_pattern[asdl_pattern_seq*]:
| [positional_patterns ','] keyword_patterns ',' a=positional_patterns { a }
invalid_if_stmt:
| 'if' named_expression NEWLINE { RAISE_SYNTAX_ERROR("expected ':'") }
| a='if' a=named_expression ':' NEWLINE !INDENT {