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bpo-42316: Allow unparenthesized walrus operator in indexes (GH-23317)

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Lysandros Nikolaou 2020-11-17 01:09:35 +02:00 • committed by GitHub
parent cb3e5ed071
commit cae60187cf
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4 changed files with 29 additions and 7 deletions
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12
Parser/parser.c
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@ -10639,7 +10639,7 @@ slices_rule(Parser *p)
return _res;
}
// slice: expression? ':' expression? [':' expression?] | expression
// slice: expression? ':' expression? [':' expression?] | named_expression
static expr_ty
slice_rule(Parser *p)
{
@ -10701,18 +10701,18 @@ slice_rule(Parser *p)
D(fprintf(stderr, "%*c%s slice[%d-%d]: %s failed!\n", p->level, ' ',
p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "expression? ':' expression? [':' expression?]"));
}
{ // expression
{ // named_expression
if (p->error_indicator) {
D(p->level--);
return NULL;
}
D(fprintf(stderr, "%*c> slice[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "expression"));
D(fprintf(stderr, "%*c> slice[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "named_expression"));
expr_ty a;
if (
(a = expression_rule(p)) // expression
(a = named_expression_rule(p)) // named_expression
)
{
D(fprintf(stderr, "%*c+ slice[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "expression"));
D(fprintf(stderr, "%*c+ slice[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "named_expression"));
_res = a;
if (_res == NULL && PyErr_Occurred()) {
p->error_indicator = 1;
@ -10723,7 +10723,7 @@ slice_rule(Parser *p)
}
p->mark = _mark;
D(fprintf(stderr, "%*c%s slice[%d-%d]: %s failed!\n", p->level, ' ',
p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "expression"));
p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "named_expression"));
}
_res = NULL;
done: