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-rw-r--r--crates/ra_hir_def/src/attr.rs8
-rw-r--r--crates/ra_hir_def/src/docs.rs50
2 files changed, 55 insertions, 3 deletions
diff --git a/crates/ra_hir_def/src/attr.rs b/crates/ra_hir_def/src/attr.rs
index 8b6c0bede..2eeba0572 100644
--- a/crates/ra_hir_def/src/attr.rs
+++ b/crates/ra_hir_def/src/attr.rs
@@ -87,12 +87,18 @@ impl Attrs {
87 } 87 }
88 88
89 pub(crate) fn new(owner: &dyn AttrsOwner, hygiene: &Hygiene) -> Attrs { 89 pub(crate) fn new(owner: &dyn AttrsOwner, hygiene: &Hygiene) -> Attrs {
90 let docs = ast::CommentIter::from_syntax_node(owner.syntax()).doc_comment_text().map(
91 |docs_text| Attr {
92 input: Some(AttrInput::Literal(SmolStr::new(docs_text))),
93 path: ModPath::from(hir_expand::name!(doc)),
94 },
95 );
90 let mut attrs = owner.attrs().peekable(); 96 let mut attrs = owner.attrs().peekable();
91 let entries = if attrs.peek().is_none() { 97 let entries = if attrs.peek().is_none() {
92 // Avoid heap allocation 98 // Avoid heap allocation
93 None 99 None
94 } else { 100 } else {
95 Some(attrs.flat_map(|ast| Attr::from_src(ast, hygiene)).collect()) 101 Some(attrs.flat_map(|ast| Attr::from_src(ast, hygiene)).chain(docs).collect())
96 }; 102 };
97 Attrs { entries } 103 Attrs { entries }
98 } 104 }
diff --git a/crates/ra_hir_def/src/docs.rs b/crates/ra_hir_def/src/docs.rs
index b221ae1ce..2630b3d89 100644
--- a/crates/ra_hir_def/src/docs.rs
+++ b/crates/ra_hir_def/src/docs.rs
@@ -29,6 +29,13 @@ impl Documentation {
29 Documentation(s.into()) 29 Documentation(s.into())
30 } 30 }
31 31
32 pub fn from_ast<N>(node: &N) -> Option<Documentation>
33 where
34 N: ast::DocCommentsOwner + ast::AttrsOwner,
35 {
36 docs_from_ast(node)
37 }
38
32 pub fn as_str(&self) -> &str { 39 pub fn as_str(&self) -> &str {
33 &*self.0 40 &*self.0
34 } 41 }
@@ -70,6 +77,45 @@ impl Documentation {
70 } 77 }
71} 78}
72 79
73pub(crate) fn docs_from_ast(node: &impl ast::DocCommentsOwner) -> Option<Documentation> { 80pub(crate) fn docs_from_ast<N>(node: &N) -> Option<Documentation>
74 node.doc_comment_text().map(|it| Documentation::new(&it)) 81where
82 N: ast::DocCommentsOwner + ast::AttrsOwner,
83{
84 let doc_comment_text = node.doc_comment_text();
85 let doc_attr_text = expand_doc_attrs(node);
86 let docs = merge_doc_comments_and_attrs(doc_comment_text, doc_attr_text);
87 docs.map(|it| Documentation::new(&it))
88}
89
90fn merge_doc_comments_and_attrs(
91 doc_comment_text: Option<String>,
92 doc_attr_text: Option<String>,
93) -> Option<String> {
94 match (doc_comment_text, doc_attr_text) {
95 (Some(mut comment_text), Some(attr_text)) => {
96 comment_text.push_str("\n\n");
97 comment_text.push_str(&attr_text);
98 Some(comment_text)
99 }
100 (Some(comment_text), None) => Some(comment_text),
101 (None, Some(attr_text)) => Some(attr_text),
102 (None, None) => None,
103 }
104}
105
106fn expand_doc_attrs(owner: &dyn ast::AttrsOwner) -> Option<String> {
107 let mut docs = String::new();
108 for attr in owner.attrs() {
109 if let Some(("doc", value)) =
110 attr.as_simple_key_value().as_ref().map(|(k, v)| (k.as_str(), v.as_str()))
111 {
112 docs.push_str(value);
113 docs.push_str("\n\n");
114 }
115 }
116 if docs.is_empty() {
117 None
118 } else {
119 Some(docs.trim_end_matches("\n\n").to_owned())
120 }
75} 121}