72 lines
2.5 KiB
Rust
72 lines
2.5 KiB
Rust
//! Defines hir documentation.
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//!
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//! This really shouldn't exist, instead, we should deshugar doc comments into attributes, see
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//! https://github.com/rust-analyzer/rust-analyzer/issues/2148#issuecomment-550519102
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use std::sync::Arc;
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use hir_expand::either::Either;
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use ra_syntax::ast;
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use crate::{db::DefDatabase, AdtId, AstItemDef, AttrDefId, HasChildSource, HasSource, Lookup};
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/// Holds documentation
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct Documentation(Arc<str>);
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impl Into<String> for Documentation {
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fn into(self) -> String {
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self.as_str().to_owned()
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}
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}
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impl Documentation {
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fn new(s: &str) -> Documentation {
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Documentation(s.into())
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}
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pub fn as_str(&self) -> &str {
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&*self.0
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}
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pub(crate) fn documentation_query(
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db: &impl DefDatabase,
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def: AttrDefId,
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) -> Option<Documentation> {
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match def {
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AttrDefId::ModuleId(module) => {
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let def_map = db.crate_def_map(module.krate);
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let src = def_map[module.module_id].declaration_source(db)?;
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docs_from_ast(&src.value)
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}
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AttrDefId::StructFieldId(it) => {
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let src = it.parent.child_source(db);
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match &src.value[it.local_id] {
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Either::A(_tuple) => None,
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Either::B(record) => docs_from_ast(record),
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}
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}
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AttrDefId::AdtId(it) => match it {
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AdtId::StructId(it) => docs_from_ast(&it.source(db).value),
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AdtId::EnumId(it) => docs_from_ast(&it.source(db).value),
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AdtId::UnionId(it) => docs_from_ast(&it.source(db).value),
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},
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AttrDefId::EnumVariantId(it) => {
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let src = it.parent.child_source(db);
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docs_from_ast(&src.value[it.local_id])
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}
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AttrDefId::TraitId(it) => docs_from_ast(&it.source(db).value),
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AttrDefId::MacroDefId(it) => docs_from_ast(&it.ast_id.to_node(db)),
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AttrDefId::ConstId(it) => docs_from_ast(&it.lookup(db).source(db).value),
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AttrDefId::StaticId(it) => docs_from_ast(&it.lookup(db).source(db).value),
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AttrDefId::FunctionId(it) => docs_from_ast(&it.lookup(db).source(db).value),
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AttrDefId::TypeAliasId(it) => docs_from_ast(&it.lookup(db).source(db).value),
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AttrDefId::ImplId(_) => None,
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}
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}
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}
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pub(crate) fn docs_from_ast(node: &impl ast::DocCommentsOwner) -> Option<Documentation> {
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node.doc_comment_text().map(|it| Documentation::new(&it))
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}
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