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Make basic use of spans for macro expansion errors

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This commit is contained in:
Lukas Wirth 2024-07-29 14:52:40 +02:00
parent 7beac14cba
commit ae9c553902
24 changed files with 392 additions and 333 deletions
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9
crates/tt/src/buffer.rs
View file

@ -134,6 +134,15 @@ pub enum TokenTreeRef<'a, Span> {
Leaf(&'a Leaf<Span>, &'a TokenTree<Span>),
}
impl<'a, Span: Copy> TokenTreeRef<'a, Span> {
pub fn span(&self) -> Span {
match self {
TokenTreeRef::Subtree(subtree, _) => subtree.delimiter.open,
TokenTreeRef::Leaf(leaf, _) => *leaf.span(),
}
}
}
impl<Span: Clone> TokenTreeRef<'_, Span> {
pub fn cloned(&self) -> TokenTree<Span> {
match self {

4
crates/tt/src/iter.rs
View file

@ -143,6 +143,10 @@ impl<'a, S: Copy> TtIter<'a, S> {
self.inner.as_slice().get(n)
}
pub fn next_span(&self) -> Option<S> {
Some(self.inner.as_slice().first()?.first_span())
}
pub fn as_slice(&self) -> &'a [TokenTree<S>] {
self.inner.as_slice()
}