[3.9] bpo-41119: Output correct error message for list/tuple followed by colon (GH-21160) (GH-21172)
(cherry picked from commit 4b85e60601489f9ee9dd2909e28d89a31566887c)
diff --git a/Grammar/python.gram b/Grammar/python.gram
index 8e6174f..8159f83 100644
--- a/Grammar/python.gram
+++ b/Grammar/python.gram
@@ -648,18 +648,18 @@
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)
)}