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Rewrite attr.rs to allow using syntax-based indices

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This commit is contained in:
Jonas Schievink 2021-05-10 21:50:42 +02:00
parent a87bec5148
commit da08198bc9
2 changed files with 84 additions and 59 deletions
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141
crates/hir_def/src/attr.rs
View file

@ -101,17 +101,13 @@ impl RawAttrs {
hygiene: &Hygiene,
) -> Self {
let entries = collect_attrs(owner)
.enumerate()
.flat_map(|(i, attr)| {
let index = AttrId(i as u32);
match attr {
Either::Left(attr) => Attr::from_src(db, attr, hygiene, index),
Either::Right(comment) => comment.doc_comment().map(|doc| Attr {
id: index,
input: Some(AttrInput::Literal(SmolStr::new(doc))),
path: Interned::new(ModPath::from(hir_expand::name!(doc))),
}),
}
.flat_map(|(id, attr)| match attr {
Either::Left(attr) => Attr::from_src(db, attr, hygiene, id),
Either::Right(comment) => comment.doc_comment().map(|doc| Attr {
id,
input: Some(AttrInput::Literal(SmolStr::new(doc))),
path: Interned::new(ModPath::from(hir_expand::name!(doc))),
}),
})
.collect::<Arc<_>>();
@ -124,6 +120,7 @@ impl RawAttrs {
}
pub(crate) fn merge(&self, other: Self) -> Self {
// FIXME: This needs to fixup `AttrId`s
match (&self.entries, &other.entries) {
(None, None) => Self::EMPTY,
(Some(entries), None) | (None, Some(entries)) => {
@ -375,39 +372,26 @@ impl AttrsWithOwner {
let def_map = module.def_map(db);
let mod_data = &def_map[module.local_id];
let attrs = match mod_data.declaration_source(db) {
match mod_data.declaration_source(db) {
Some(it) => {
let mut attrs: Vec<_> = collect_attrs(&it.value as &dyn ast::AttrsOwner)
.map(|attr| InFile::new(it.file_id, attr))
.collect();
let mut map = AttrSourceMap::new(InFile::new(it.file_id, &it.value));
if let InFile { file_id, value: ModuleSource::SourceFile(file) } =
mod_data.definition_source(db)
{
attrs.extend(
collect_attrs(&file as &dyn ast::AttrsOwner)
.map(|attr| InFile::new(file_id, attr)),
)
map.merge(AttrSourceMap::new(InFile::new(file_id, &file)));
}
attrs
return map;
}
None => {
let InFile { file_id, value } = mod_data.definition_source(db);
match &value {
ModuleSource::SourceFile(file) => {
collect_attrs(file as &dyn ast::AttrsOwner)
}
ModuleSource::Module(module) => {
collect_attrs(module as &dyn ast::AttrsOwner)
}
ModuleSource::BlockExpr(block) => {
collect_attrs(block as &dyn ast::AttrsOwner)
}
}
.map(|attr| InFile::new(file_id, attr))
.collect()
let attrs_owner = match &value {
ModuleSource::SourceFile(file) => file as &dyn ast::AttrsOwner,
ModuleSource::Module(module) => module as &dyn ast::AttrsOwner,
ModuleSource::BlockExpr(block) => block as &dyn ast::AttrsOwner,
};
return AttrSourceMap::new(InFile::new(file_id, attrs_owner));
}
};
return AttrSourceMap { attrs };
}
}
AttrDefId::FieldId(id) => {
let map = db.fields_attrs_source_map(id.parent);
@ -462,11 +446,7 @@ impl AttrsWithOwner {
},
};
AttrSourceMap {
attrs: collect_attrs(&owner.value)
.map(|attr| InFile::new(owner.file_id, attr))
.collect(),
}
AttrSourceMap::new(owner.as_ref().map(|node| node as &dyn AttrsOwner))
}
pub fn docs_with_rangemap(
@ -518,7 +498,7 @@ impl AttrsWithOwner {
if buf.is_empty() {
None
} else {
Some((Documentation(buf), DocsRangeMap { mapping, source: self.source_map(db).attrs }))
Some((Documentation(buf), DocsRangeMap { mapping, source_map: self.source_map(db) }))
}
}
}
@ -559,27 +539,59 @@ fn inner_attributes(
}
pub struct AttrSourceMap {
attrs: Vec<InFile<Either<ast::Attr, ast::Comment>>>,
attrs: Vec<InFile<ast::Attr>>,
doc_comments: Vec<InFile<ast::Comment>>,
}
impl AttrSourceMap {
fn new(owner: InFile<&dyn ast::AttrsOwner>) -> Self {
let mut attrs = Vec::new();
let mut doc_comments = Vec::new();
for (_, attr) in collect_attrs(owner.value) {
match attr {
Either::Left(attr) => attrs.push(owner.with_value(attr)),
Either::Right(comment) => doc_comments.push(owner.with_value(comment)),
}
}
Self { attrs, doc_comments }
}
fn merge(&mut self, other: Self) {
self.attrs.extend(other.attrs);
self.doc_comments.extend(other.doc_comments);
}
/// Maps the lowered `Attr` back to its original syntax node.
///
/// `attr` must come from the `owner` used for AttrSourceMap
///
/// Note that the returned syntax node might be a `#[cfg_attr]`, or a doc comment, instead of
/// the attribute represented by `Attr`.
pub fn source_of(&self, attr: &Attr) -> InFile<&Either<ast::Attr, ast::Comment>> {
self.attrs
.get(attr.id.0 as usize)
.unwrap_or_else(|| panic!("cannot find `Attr` at index {:?}", attr.id))
.as_ref()
pub fn source_of(&self, attr: &Attr) -> InFile<Either<ast::Attr, ast::Comment>> {
self.source_of_id(attr.id)
}
fn source_of_id(&self, id: AttrId) -> InFile<Either<ast::Attr, ast::Comment>> {
if id.is_doc_comment {
self.doc_comments
.get(id.ast_index as usize)
.unwrap_or_else(|| panic!("cannot find doc comment at index {:?}", id))
.clone()
.map(|attr| Either::Right(attr))
} else {
self.attrs
.get(id.ast_index as usize)
.unwrap_or_else(|| panic!("cannot find `Attr` at index {:?}", id))
.clone()
.map(|attr| Either::Left(attr))
}
}
}
/// A struct to map text ranges from [`Documentation`] back to TextRanges in the syntax tree.
pub struct DocsRangeMap {
source: Vec<InFile<Either<ast::Attr, ast::Comment>>>,
source_map: AttrSourceMap,
// (docstring-line-range, attr_index, attr-string-range)
// a mapping from the text range of a line of the [`Documentation`] to the attribute index and
// the original (untrimmed) syntax doc line
@ -596,7 +608,7 @@ impl DocsRangeMap {
let relative_range = range - line_docs_range.start();
let &InFile { file_id, value: ref source } = &self.source[idx.0 as usize];
let &InFile { file_id, value: ref source } = &self.source_map.source_of_id(idx);
match source {
Either::Left(_) => None, // FIXME, figure out a nice way to handle doc attributes here
// as well as for whats done in syntax highlight doc injection
@ -616,7 +628,10 @@ impl DocsRangeMap {
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct AttrId(pub u32);
pub(crate) struct AttrId {
is_doc_comment: bool,
pub(crate) ast_index: u32,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Attr {
@ -752,22 +767,32 @@ fn attrs_from_item_tree<N: ItemTreeNode>(id: ItemTreeId<N>, db: &dyn DefDatabase
fn collect_attrs(
owner: &dyn ast::AttrsOwner,
) -> impl Iterator<Item = Either<ast::Attr, ast::Comment>> {
) -> impl Iterator<Item = (AttrId, Either<ast::Attr, ast::Comment>)> {
let (inner_attrs, inner_docs) = inner_attributes(owner.syntax())
.map_or((None, None), |(attrs, docs)| (Some(attrs), Some(docs)));
let outer_attrs = owner.attrs().filter(|attr| attr.kind().is_outer());
let attrs = outer_attrs
.chain(inner_attrs.into_iter().flatten())
.map(|attr| (attr.syntax().text_range().start(), Either::Left(attr)));
let attrs =
outer_attrs.chain(inner_attrs.into_iter().flatten()).enumerate().map(|(idx, attr)| {
(
AttrId { ast_index: idx as u32, is_doc_comment: false },
attr.syntax().text_range().start(),
Either::Left(attr),
)
});
let outer_docs =
ast::CommentIter::from_syntax_node(owner.syntax()).filter(ast::Comment::is_outer);
let docs = outer_docs
.chain(inner_docs.into_iter().flatten())
.map(|docs_text| (docs_text.syntax().text_range().start(), Either::Right(docs_text)));
let docs =
outer_docs.chain(inner_docs.into_iter().flatten()).enumerate().map(|(idx, docs_text)| {
(
AttrId { ast_index: idx as u32, is_doc_comment: true },
docs_text.syntax().text_range().start(),
Either::Right(docs_text),
)
});
// sort here by syntax node offset because the source can have doc attributes and doc strings be interleaved
docs.chain(attrs).sorted_by_key(|&(offset, _)| offset).map(|(_, attr)| attr)
docs.chain(attrs).sorted_by_key(|&(_, offset, _)| offset).map(|(id, _, attr)| (id, attr))
}
pub(crate) fn variants_attrs_source_map(

2
crates/hir_def/src/lib.rs
View file

@ -753,7 +753,7 @@ fn derive_macro_as_call_id(
MacroCallKind::Derive {
ast_id: item_attr.ast_id,
derive_name: last_segment.to_string(),
derive_attr_index: derive_attr.0,
derive_attr_index: derive_attr.ast_index,
},
)
.into();