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Don't stringify cfg_attr-gated attributes

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This preserves the assigned `TokenId`s
This commit is contained in:
Jonas Schievink 2021-06-11 18:20:15 +02:00
parent 1d6eef1350
commit 99d40e7a3a
1 changed files with 18 additions and 4 deletions
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22
crates/hir_def/src/attr.rs
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@ -106,7 +106,9 @@ impl RawAttrs {
) -> Self {
let entries = collect_attrs(owner)
.flat_map(|(id, attr)| match attr {
Either::Left(attr) => Attr::from_src(db, attr, hygiene, id),
Either::Left(attr) => {
attr.meta().and_then(|meta| Attr::from_src(db, meta, hygiene, id))
}
Either::Right(comment) => comment.doc_comment().map(|doc| Attr {
id,
input: Some(Interned::new(AttrInput::Literal(SmolStr::new(doc)))),
@ -172,10 +174,9 @@ impl RawAttrs {
let index = attr.id;
let attrs = parts.filter(|a| !a.is_empty()).filter_map(|attr| {
let tree = Subtree { delimiter: None, token_trees: attr.to_vec() };
let attr = ast::Attr::parse(&format!("#[{}]", tree)).ok()?;
// FIXME hygiene
let hygiene = Hygiene::new_unhygienic();
Attr::from_src(db, attr, &hygiene, index)
Attr::from_tt(db, &tree, &hygiene, index)
});
let cfg_options = &crate_graph[krate].cfg_options;
@ -664,7 +665,7 @@ impl fmt::Display for AttrInput {
impl Attr {
fn from_src(
db: &dyn DefDatabase,
ast: ast::Attr,
ast: ast::Meta,
hygiene: &Hygiene,
id: AttrId,
) -> Option<Attr> {
@ -683,6 +684,19 @@ impl Attr {
Some(Attr { id, path, input })
}
fn from_tt(
db: &dyn DefDatabase,
tt: &tt::Subtree,
hygiene: &Hygiene,
id: AttrId,
) -> Option<Attr> {
let (parse, _) =
mbe::token_tree_to_syntax_node(tt, hir_expand::FragmentKind::MetaItem).ok()?;
let ast = ast::Meta::cast(parse.syntax_node())?;
Self::from_src(db, ast, hygiene, id)
}
/// Parses this attribute as a `#[derive]`, returns an iterator that yields all contained paths
/// to derive macros.
///