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gh-123562: Improve SyntaxError message for case ... as a.b (#123563)

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sobolevn 2024-09-02 14:11:44 +03:00 • committed by GitHub
parent c3ed775899
commit 23f159ae71
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5 changed files with 59 additions and 10 deletions
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14
Parser/parser.c generated
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@ -24005,7 +24005,7 @@ invalid_case_block_rule(Parser *p)
return _res;
}
// invalid_as_pattern: or_pattern 'as' "_" | or_pattern 'as' !NAME expression
// invalid_as_pattern: or_pattern 'as' "_" | or_pattern 'as' expression
static void *
invalid_as_pattern_rule(Parser *p)
{
@ -24048,12 +24048,12 @@ invalid_as_pattern_rule(Parser *p)
D(fprintf(stderr, "%*c%s invalid_as_pattern[%d-%d]: %s failed!\n", p->level, ' ',
p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "or_pattern 'as' \"_\""));
}
{ // or_pattern 'as' !NAME expression
{ // or_pattern 'as' expression
if (p->error_indicator) {
p->level--;
return NULL;
}
D(fprintf(stderr, "%*c> invalid_as_pattern[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "or_pattern 'as' !NAME expression"));
D(fprintf(stderr, "%*c> invalid_as_pattern[%d-%d]: %s\n", p->level, ' ', _mark, p->mark, "or_pattern 'as' expression"));
Token * _keyword;
expr_ty a;
pattern_ty or_pattern_var;
@ -24062,13 +24062,11 @@ invalid_as_pattern_rule(Parser *p)
&&
(_keyword = _PyPegen_expect_token(p, 666)) // token='as'
&&
_PyPegen_lookahead_with_name(0, _PyPegen_name_token, p)
&&
(a = expression_rule(p)) // expression
)
{
D(fprintf(stderr, "%*c+ invalid_as_pattern[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "or_pattern 'as' !NAME expression"));
_res = RAISE_SYNTAX_ERROR_KNOWN_LOCATION ( a , "invalid pattern target" );
D(fprintf(stderr, "%*c+ invalid_as_pattern[%d-%d]: %s succeeded!\n", p->level, ' ', _mark, p->mark, "or_pattern 'as' expression"));
_res = RAISE_SYNTAX_ERROR_KNOWN_LOCATION ( a , "cannot use %s as pattern target" , _PyPegen_get_expr_name ( a ) );
if (_res == NULL && PyErr_Occurred()) {
p->error_indicator = 1;
p->level--;
@ -24078,7 +24076,7 @@ invalid_as_pattern_rule(Parser *p)
}
p->mark = _mark;
D(fprintf(stderr, "%*c%s invalid_as_pattern[%d-%d]: %s failed!\n", p->level, ' ',
p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "or_pattern 'as' !NAME expression"));
p->error_indicator ? "ERROR!" : "-", _mark, p->mark, "or_pattern 'as' expression"));
}
_res = NULL;
done: