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Implement unsafe attribute parsing

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This commit is contained in:
Lukas Wirth 2024-05-06 12:09:31 +02:00
parent c4618fe14d
commit e1aeed3aed
8 changed files with 534 additions and 11 deletions
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16
crates/hir-expand/src/attrs.rs
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@ -252,8 +252,18 @@ impl Attr {
Some(Attr { id, path, input, ctxt: span.ctx })
}
fn from_tt(db: &dyn ExpandDatabase, tt: &[tt::TokenTree], id: AttrId) -> Option<Attr> {
let ctxt = tt.first()?.first_span().ctx;
fn from_tt(db: &dyn ExpandDatabase, mut tt: &[tt::TokenTree], id: AttrId) -> Option<Attr> {
if matches!(tt,
[tt::TokenTree::Leaf(tt::Leaf::Ident(tt::Ident { text, .. })), ..]
if text == "unsafe"
) {
match tt.get(1) {
Some(tt::TokenTree::Subtree(subtree)) => tt = &subtree.token_trees,
_ => return None,
}
}
let first = &tt.first()?;
let ctxt = first.first_span().ctx;
let path_end = tt
.iter()
.position(|tt| {
@ -435,7 +445,7 @@ fn inner_attributes(
// Input subtree is: `(cfg, $(attr),+)`
// Split it up into a `cfg` subtree and the `attr` subtrees.
pub fn parse_cfg_attr_input(
fn parse_cfg_attr_input(
subtree: &Subtree,
) -> Option<(&[tt::TokenTree], impl Iterator<Item = &[tt::TokenTree]>)> {
let mut parts = subtree