From d65dc40348afc90c812b4d392f8e085eca78fc17 Mon Sep 17 00:00:00 2001
From: kjeremy <kjeremy@gmail.com>
Date: Wed, 31 Jul 2019 11:43:00 -0400
Subject: Removes `*/` in block doc comments

---
 crates/ra_syntax/src/ast.rs        | 49 ++++++++++++++++++++++++++++++++++++++
 crates/ra_syntax/src/ast/traits.rs | 15 ++++++++++--
 2 files changed, 62 insertions(+), 2 deletions(-)

diff --git a/crates/ra_syntax/src/ast.rs b/crates/ra_syntax/src/ast.rs
index c5746d98d..8ac313e6e 100644
--- a/crates/ra_syntax/src/ast.rs
+++ b/crates/ra_syntax/src/ast.rs
@@ -138,6 +138,55 @@ fn test_doc_comment_preserves_newlines() {
     assert_eq!("this\nis\nmod\nfoo", module.doc_comment_text().unwrap());
 }
 
+#[test]
+fn test_doc_comment_single_line_block_strips_suffix() {
+    let file = SourceFile::parse(
+        r#"
+        /** this is mod foo*/
+        mod foo {}
+        "#,
+    )
+    .ok()
+    .unwrap();
+    let module = file.syntax().descendants().find_map(Module::cast).unwrap();
+    assert_eq!("this is mod foo", module.doc_comment_text().unwrap());
+}
+
+#[test]
+fn test_doc_comment_single_line_block_strips_suffix_whitespace() {
+    let file = SourceFile::parse(
+        r#"
+        /** this is mod foo */
+        mod foo {}
+        "#,
+    )
+    .ok()
+    .unwrap();
+    let module = file.syntax().descendants().find_map(Module::cast).unwrap();
+    assert_eq!("this is mod foo", module.doc_comment_text().unwrap());
+}
+
+#[test]
+fn test_doc_comment_multi_line_block_strips_suffix() {
+    let file = SourceFile::parse(
+        r#"
+        /**
+        this
+        is
+        mod foo
+        */
+        mod foo {}
+        "#,
+    )
+    .ok()
+    .unwrap();
+    let module = file.syntax().descendants().find_map(Module::cast).unwrap();
+    assert_eq!(
+        "        this\n        is\n        mod foo\n       ",
+        module.doc_comment_text().unwrap()
+    );
+}
+
 #[test]
 fn test_where_predicates() {
     fn assert_bound(text: &str, bound: Option<TypeBound>) {
diff --git a/crates/ra_syntax/src/ast/traits.rs b/crates/ra_syntax/src/ast/traits.rs
index 6ed1b5213..0c193e019 100644
--- a/crates/ra_syntax/src/ast/traits.rs
+++ b/crates/ra_syntax/src/ast/traits.rs
@@ -115,7 +115,7 @@ pub trait DocCommentsOwner: AstNode {
     }
 
     /// Returns the textual content of a doc comment block as a single string.
-    /// That is, strips leading `///` (+ optional 1 character of whitespace)
+    /// That is, strips leading `///` or trailing `*/` (+ optional 1 character of whitespace in either direction)
     /// and joins lines.
     fn doc_comment_text(&self) -> Option<String> {
         let mut has_comments = false;
@@ -136,7 +136,18 @@ pub trait DocCommentsOwner: AstNode {
                         prefix_len
                     };
 
-                line[pos..].to_owned()
+                let end = if comment.kind().shape.is_block() && line.ends_with("*/") {
+                    // FIXME: Use `nth_back` here once stable
+                    if line.chars().rev().nth(2).map(|c| c.is_whitespace()).unwrap_or(false) {
+                        line.len() - 3
+                    } else {
+                        line.len() - 2
+                    }
+                } else {
+                    line.len()
+                };
+
+                line[pos..end].to_owned()
             })
             .join("\n");
 
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