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[3.9] bpo-41119: Output correct error message for list/tuple followed by colon (GH-21160) (GH-21172)

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(cherry picked from commit 4b85e60601)
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Lysandros Nikolaou 2020-06-27 02:14:12 +03:00 • committed by GitHub
parent f925407a19
commit d01a3e76ee
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2 changed files with 464 additions and 500 deletions
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10
Grammar/python.gram
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@ -648,18 +648,18 @@ invalid_named_expression:
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
a, "cannot use assignment expressions with %s", _PyPegen_get_expr_name(a)) }
invalid_assignment:
| a=list ':' { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "only single target (not list) can be annotated") }
| a=tuple ':' { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "only single target (not tuple) can be annotated") }
| a=star_named_expression ',' star_named_expressions* ':' {
| a=list ':' expression { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "only single target (not list) can be annotated") }
| a=tuple ':' expression { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "only single target (not tuple) can be annotated") }
| a=star_named_expression ',' star_named_expressions* ':' expression {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "only single target (not tuple) can be annotated") }
| a=expression ':' expression ['=' annotated_rhs] {
| a=expression ':' expression {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "illegal target for annotation") }
| (star_targets '=')* a=star_expressions '=' {
RAISE_SYNTAX_ERROR_INVALID_TARGET(STAR_TARGETS, a) }
| (star_targets '=')* a=yield_expr '=' { RAISE_SYNTAX_ERROR_KNOWN_LOCATION(a, "assignment to yield expression not possible") }
| a=star_expressions augassign (yield_expr | star_expressions) {
RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
a,
a,
"'%s' is an illegal expression for augmented assignment",
_PyPegen_get_expr_name(a)
)}

954
Parser/pegen/parse.c
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