bjoernager/rust
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use create_snapshot_for_diagnostic instead of clone for Parser

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This commit is contained in:
Takayuki Maeda 2022-08-15 16:42:58 +09:00
parent 0068b8bf4b
commit 84f0d5e460
1 changed files with 2 additions and 2 deletions
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4
compiler/rustc_parse/src/parser/item.rs
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@ -2260,7 +2260,7 @@ impl<'a> Parser<'a> {
(pat, this.parse_ty_for_param()?) (pat, this.parse_ty_for_param()?)
} else { } else {
debug!("parse_param_general ident_to_pat"); debug!("parse_param_general ident_to_pat");
let parser_snapshot_before_ty = this.clone(); let parser_snapshot_before_ty = this.create_snapshot_for_diagnostic();
this.eat_incorrect_doc_comment_for_param_type(); this.eat_incorrect_doc_comment_for_param_type();
let mut ty = this.parse_ty_for_param(); let mut ty = this.parse_ty_for_param();
if ty.is_ok() if ty.is_ok()
@ -2283,7 +2283,7 @@ impl<'a> Parser<'a> {
// Recover from attempting to parse the argument as a type without pattern. // Recover from attempting to parse the argument as a type without pattern.
Err(err) => { Err(err) => {
err.cancel(); err.cancel();
*this = parser_snapshot_before_ty; this.restore_snapshot(parser_snapshot_before_ty);
this.recover_arg_parse()? this.recover_arg_parse()?
} }
} }