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bpo-40903: Handle multiple '=' in invalid assignment rules in the PEG parser (GH-20697)

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Automerge-Triggered-By: @pablogsal
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Pablo Galindo 2020-06-08 02:57:00 +01:00 • committed by GitHub
parent 843c277656
commit 9f495908c5
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5 changed files with 558 additions and 342 deletions
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@ -92,7 +92,7 @@ assignment[stmt_ty]:
| a=('(' b=single_target ')' { b }
| single_subscript_attribute_target) ':' b=expression c=['=' d=annotated_rhs { d }] {
CHECK_VERSION(6, "Variable annotations syntax is", _Py_AnnAssign(a, b, c, 0, EXTRA)) }
| a=(z=star_targets '=' { z })+ b=(yield_expr | star_expressions) tc=[TYPE_COMMENT] {
| a=(z=star_targets '=' { z })+ b=(yield_expr | star_expressions) !'=' tc=[TYPE_COMMENT] {
_Py_Assign(a, b, NEW_TYPE_COMMENT(p, tc), EXTRA) }
| a=single_target b=augassign c=(yield_expr | star_expressions) {
_Py_AugAssign(a, b->kind, c, EXTRA) }
@ -646,10 +646,11 @@ 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=star_expressions '=' (yield_expr | star_expressions) {
| (star_targets '=')* a=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))) }
| (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,