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Only check force_collect in collect_tokens_trailing_token.

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There are three places where we currently check `force_collect` and call
`collect_tokens_no_attrs` for `ForceCollect::Yes` and a vanilla parsing
function for `ForceCollect::No`.

But we can instead just pass in `force_collect` and let
`collect_tokens_trailing_token` do the appropriate thing.
This commit is contained in:
Nicholas Nethercote 2024-07-17 14:02:37 +10:00
parent 9d908a2877
commit 4158a1c48f
2 changed files with 21 additions and 24 deletions
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12
compiler/rustc_parse/src/parser/attr.rs
View File

@ -251,13 +251,12 @@ impl<'a> Parser<'a> {
pub fn parse_attr_item(&mut self, force_collect: ForceCollect) -> PResult<'a, ast::AttrItem> {
maybe_whole!(self, NtMeta, |attr| attr.into_inner());
let do_parse = |this: &mut Self| {
let do_parse = |this: &mut Self, _empty_attrs| {
let is_unsafe = this.eat_keyword(kw::Unsafe);
let unsafety = if is_unsafe {
let unsafe_span = this.prev_token.span;
this.psess.gated_spans.gate(sym::unsafe_attributes, unsafe_span);
this.expect(&token::OpenDelim(Delimiter::Parenthesis))?;
ast::Safety::Unsafe(unsafe_span)
} else {
ast::Safety::Default
@ -268,13 +267,10 @@ impl<'a> Parser<'a> {
if is_unsafe {
this.expect(&token::CloseDelim(Delimiter::Parenthesis))?;
}
Ok(ast::AttrItem { unsafety, path, args, tokens: None })
Ok((ast::AttrItem { unsafety, path, args, tokens: None }, false))
};
// Attr items don't have attributes
match force_collect {
ForceCollect::Yes => self.collect_tokens_no_attrs(do_parse),
ForceCollect::No => do_parse(self),
}
// Attr items don't have attributes.
self.collect_tokens_trailing_token(AttrWrapper::empty(), force_collect, do_parse)
}
/// Parses attributes that appear after the opening of an item. These should

33
compiler/rustc_parse/src/parser/stmt.rs
View File

@ -99,17 +99,17 @@ impl<'a> Parser<'a> {
// or `auto trait` items. We aim to parse an arbitrary path `a::b` but not something
// that starts like a path (1 token), but it fact not a path.
// Also, we avoid stealing syntax from `parse_item_`.
match force_collect {
ForceCollect::Yes => {
self.collect_tokens_no_attrs(|this| this.parse_stmt_path_start(lo, attrs))?
let stmt = self.collect_tokens_trailing_token(
AttrWrapper::empty(),
force_collect,
|this, _empty_attrs| Ok((this.parse_stmt_path_start(lo, attrs)?, false)),
);
match stmt {
Ok(stmt) => stmt,
Err(mut err) => {
self.suggest_add_missing_let_for_stmt(&mut err);
return Err(err);
}
ForceCollect::No => match self.parse_stmt_path_start(lo, attrs) {
Ok(stmt) => stmt,
Err(mut err) => {
self.suggest_add_missing_let_for_stmt(&mut err);
return Err(err);
}
},
}
} else if let Some(item) = self.parse_item_common(
attrs.clone(),
@ -126,12 +126,13 @@ impl<'a> Parser<'a> {
self.mk_stmt(lo, StmtKind::Empty)
} else if self.token != token::CloseDelim(Delimiter::Brace) {
// Remainder are line-expr stmts.
let e = match force_collect {
ForceCollect::Yes => self.collect_tokens_no_attrs(|this| {
this.parse_expr_res(Restrictions::STMT_EXPR, attrs)
})?,
ForceCollect::No => self.parse_expr_res(Restrictions::STMT_EXPR, attrs)?,
};
let e = self.collect_tokens_trailing_token(
AttrWrapper::empty(),
force_collect,
|this, _empty_attrs| {
Ok((this.parse_expr_res(Restrictions::STMT_EXPR, attrs)?, false))
},
)?;
if matches!(e.kind, ExprKind::Assign(..)) && self.eat_keyword(kw::Else) {
let bl = self.parse_block()?;
// Destructuring assignment ... else.