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

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Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
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Pablo Galindo 2020-05-15 02:04:52 +01:00 • committed by GitHub
parent 7ba1f75f3f
commit 16ab07063c
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10 changed files with 137 additions and 45 deletions
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Grammar/python.gram
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@ -640,8 +640,17 @@ invalid_assignment:
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "only single target (not tuple) can be annotated") }
| a=expression ':' expression ['=' annotated_rhs] {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "illegal target for annotation") }
| a=expression ('=' | augassign) (yield_expr | star_expressions) {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "cannot assign to %s", _PyPegen_get_expr_name(a)) }
| a=star_expressions '=' (yield_expr | star_expressions) {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
_PyPegen_get_invalid_target(a),
"cannot assign to %s", _PyPegen_get_expr_name(_PyPegen_get_invalid_target(a))) }
| a=star_expressions augassign (yield_expr | star_expressions) {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
a,
"'%s' is an illegal expression for augmented assignment",
_PyPegen_get_expr_name(a)
)}
invalid_block:
| NEWLINE !INDENT { RAISE_INDENTATION_ERROR("expected an indented block") }
invalid_comprehension: