bjoernager/rust
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suggest adding { .. } around a const function with arguments

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This commit is contained in:
Takayuki Maeda 2022-03-08 17:07:35 +09:00
parent d53e19540e
commit 529fd2da89
3 changed files with 84 additions and 0 deletions
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9
compiler/rustc_parse/src/parser/path.rs
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@ -624,9 +624,18 @@ impl<'a> Parser<'a> {
GenericArg::Const(self.parse_const_arg()?)
} else if self.check_type() {
// Parse type argument.
let is_const_fn = self.look_ahead(1, |t| t.kind == token::OpenDelim(token::Paren));
let mut snapshot = self.clone();
match self.parse_ty() {
Ok(ty) => GenericArg::Type(ty),
Err(err) => {
if is_const_fn {
if let Ok(expr) = snapshot.parse_expr_res(Restrictions::CONST_EXPR, None) {
*self = snapshot;
return Ok(Some(self.dummy_const_arg_needs_braces(err, expr.span)));
}
}
// self.parse_fn_call_expr();
// Try to recover from possible `const` arg without braces.
return self.recover_const_arg(start, err).map(Some);
}