Rollup merge of rust-lang#55136 - GuillaumeGomez:short-doc, r=QuietMi…

…sdreavus

Remove short doc where it starts with a codeblock

Fixes rust-lang#54975.

src/librustdoc/html/markdown.rs

@@ -399,7 +399,6 @@ impl<'a, I: Iterator<Item = Event<'a>>> SummaryLine<'a, I> {
 fn check_if_allowed_tag(t: &Tag) -> bool {
     match *t {
         Tag::Paragraph
-        | Tag::CodeBlock(_)
         | Tag::Item
         | Tag::Emphasis
         | Tag::Strong
@@ -420,29 +419,36 @@ impl<'a, I: Iterator<Item = Event<'a>>> Iterator for SummaryLine<'a, I> {
         if !self.started {
             self.started = true;
         }
-        let event = self.inner.next();
-        let mut is_start = true;
-        let is_allowed_tag = match event {
-            Some(Event::Start(ref c)) => {
-                self.depth += 1;
-                check_if_allowed_tag(c)
-            }
-            Some(Event::End(ref c)) => {
-                self.depth -= 1;
-                is_start = false;
-                check_if_allowed_tag(c)
-            }
-            _ => true,
-        };
-        if is_allowed_tag == false {
-            if is_start {
-                Some(Event::Start(Tag::Paragraph))
+        while let Some(event) = self.inner.next() {
+            let mut is_start = true;
+            let is_allowed_tag = match event {
+                Event::Start(Tag::CodeBlock(_)) | Event::End(Tag::CodeBlock(_)) => {
+                    return None;
+                }
+                Event::Start(ref c) => {
+                    self.depth += 1;
+                    check_if_allowed_tag(c)
+                }
+                Event::End(ref c) => {
+                    self.depth -= 1;
+                    is_start = false;
+                    check_if_allowed_tag(c)
+                }
+                _ => {
+                    true
+                }
+            };
+            return if is_allowed_tag == false {
+                if is_start {
+                    Some(Event::Start(Tag::Paragraph))
+                } else {
+                    Some(Event::End(Tag::Paragraph))
+                }
             } else {
-                Some(Event::End(Tag::Paragraph))
-            }
-        } else {
-            event
+                Some(event)
+            };
         }
+        None
     }
 }
 

src/librustdoc/html/render.rs

@@ -2584,24 +2584,39 @@ fn item_module(w: &mut fmt::Formatter, cx: &Context,
                     _ => "",
                 };
 
+                let stab = myitem.stability_class();
+                let add = if stab.is_some() {
+                    " "
+                } else {
+                    ""
+                };
+
                 let doc_value = myitem.doc_value().unwrap_or("");
-                write!(w, "
-                       <tr class='{stab} module-item'>
-                           <td><a class=\"{class}\" href=\"{href}\"
-                                  title='{title_type} {title}'>{name}</a>{unsafety_flag}</td>
-                           <td class='docblock-short'>
-                               {stab_docs} {docs}
-                           </td>
+                write!(w, "\
+                       <tr class='{stab}{add}module-item'>\
+                           <td><a class=\"{class}\" href=\"{href}\" \
+                                  title='{title}'>{name}</a>{unsafety_flag}</td>\
+                           <td class='docblock-short'>{stab_docs}{docs}\
+                           </td>\
                        </tr>",
                        name = *myitem.name.as_ref().unwrap(),
                        stab_docs = stab_docs,
                        docs = MarkdownSummaryLine(doc_value, &myitem.links()),
                        class = myitem.type_(),
-                       stab = myitem.stability_class().unwrap_or(String::new()),
+                       add = add,
+                       stab = stab.unwrap_or_else(|| String::new()),
                        unsafety_flag = unsafety_flag,
                        href = item_path(myitem.type_(), myitem.name.as_ref().unwrap()),
-                       title_type = myitem.type_(),
-                       title = full_path(cx, myitem))?;
+                       title = [full_path(cx, myitem), myitem.type_().to_string()]
+                                .iter()
+                                .filter_map(|s| if !s.is_empty() {
+                                    Some(s.as_str())
+                                } else {
+                                    None
+                                })
+                                .collect::<Vec<_>>()
+                                .join(" "),
+                      )?;
             }
         }
     }

src/test/rustdoc/doc-cfg.rs

@@ -20,8 +20,8 @@ pub struct Portable;
 // @has doc_cfg/unix_only/index.html \
 //  '//*[@id="main"]/*[@class="stability"]/*[@class="stab portability"]' \
 //  'This is supported on Unix only.'
-// @matches - '//*[@class=" module-item"]//*[@class="stab portability"]' '\AUnix\Z'
-// @matches - '//*[@class=" module-item"]//*[@class="stab portability"]' '\AUnix and ARM\Z'
+// @matches - '//*[@class="module-item"]//*[@class="stab portability"]' '\AUnix\Z'
+// @matches - '//*[@class="module-item"]//*[@class="stab portability"]' '\AUnix and ARM\Z'
 // @count - '//*[@class="stab portability"]' 3
 #[doc(cfg(unix))]
 pub mod unix_only {
@@ -52,7 +52,7 @@ pub mod unix_only {
 
 // the portability header is different on the module view versus the full view
 // @has doc_cfg/index.html
-// @matches - '//*[@class=" module-item"]//*[@class="stab portability"]' '\Aavx\Z'
+// @matches - '//*[@class="module-item"]//*[@class="stab portability"]' '\Aavx\Z'
 
 // @has doc_cfg/fn.uses_target_feature.html
 // @has - '//*[@id="main"]/*[@class="stability"]/*[@class="stab portability"]' \

src/test/rustdoc/short-docblock-codeblock.rs

@@ -0,0 +1,22 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![crate_name = "foo"]
+
+// @has foo/index.html '//*[@class="module-item"]//td[@class="docblock-short"]' ""
+// @!has foo/index.html '//*[@id="module-item"]//td[@class="docblock-short"]' "Some text."
+// @!has foo/index.html '//*[@id="module-item"]//td[@class="docblock-short"]' "let x = 12;"
+
+/// ```
+/// let x = 12;
+/// ```
+///
+/// Some text.
+pub fn foo() {}