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bpo-41659: Disallow curly brace directly after primary #22996

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Oct 27, 2020
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bpo-41659: Disallow curly brace directly after primary #22996

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bpo-41659: Disallow curly brace directly after primary
lysnikolaou Oct 26, 2020
aada2f0
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lysnikolaou Oct 27, 2020
a4f3585
Add tests
lysnikolaou Oct 27, 2020
d73538a
📜🤖 Added by blurb_it.
blurb-it[bot] Oct 27, 2020
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3 changes: 3 additions & 0 deletions Grammar/python.gram
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Original file line number Diff line number Diff line change
Expand Up @@ -475,6 +475,7 @@ await_primary[expr_ty] (memo):
| AWAIT a=primary { CHECK_VERSION(expr_ty, 5, "Await expressions are", _Py_Await(a, EXTRA)) }
| primary
primary[expr_ty]:
| invalid_primary # must be before 'primay genexp' because of invalid_genexp
| a=primary '.' b=NAME { _Py_Attribute(a, b->v.Name.id, Load, EXTRA) }
| a=primary b=genexp { _Py_Call(a, CHECK(asdl_expr_seq*, (asdl_expr_seq*)_PyPegen_singleton_seq(p, b)), NULL, EXTRA) }
| a=primary '(' b=[arguments] ')' {
Expand Down Expand Up @@ -682,6 +683,8 @@ invalid_del_stmt:
RAISE_SYNTAX_ERROR_INVALID_TARGET(DEL_TARGETS, a) }
invalid_block:
| NEWLINE !INDENT { RAISE_INDENTATION_ERROR("expected an indented block") }
invalid_primary:
| primary a='{' { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "invalid syntax") }
invalid_comprehension:
| ('[' | '(' | '{') a=starred_expression for_if_clauses {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "iterable unpacking cannot be used in comprehension") }
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