Drop RefCell from IdMap in markdown rendering

Mark-Simulacrum · Mark-Simulacrum · commit 1aa0964b543e · 2019-08-11T10:47:58.000-04:00
diff --git a/src/librustdoc/externalfiles.rs b/src/librustdoc/externalfiles.rs
@@ -6,8 +6,6 @@ use crate::syntax::feature_gate::UnstableFeatures;
 use crate::syntax::edition::Edition;
 use crate::html::markdown::{IdMap, ErrorCodes, Markdown, Playground};
 
-use std::cell::RefCell;
-
 #[derive(Clone, Debug)]
 pub struct ExternalHtml {
     /// Content that will be included inline in the <head> section of a
@@ -35,7 +33,7 @@ impl ExternalHtml {
             .and_then(|(ih, bc)|
                 load_external_files(md_before_content, diag)
                     .map(|m_bc| (ih,
-                            format!("{}{}", bc, Markdown(&m_bc, &[], RefCell::new(id_map),
+                            format!("{}{}", bc, Markdown(&m_bc, &[], id_map,
                                     codes, edition, playground).to_string())))
             )
             .and_then(|(ih, bc)|
@@ -45,7 +43,7 @@ impl ExternalHtml {
             .and_then(|(ih, bc, ac)|
                 load_external_files(md_after_content, diag)
                     .map(|m_ac| (ih, bc,
-                            format!("{}{}", ac, Markdown(&m_ac, &[], RefCell::new(id_map),
+                            format!("{}{}", ac, Markdown(&m_ac, &[], id_map,
                                     codes, edition, playground).to_string())))
             )
             .map(|(ih, bc, ac)|
diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
@@ -9,12 +9,10 @@
 //!
 //! use syntax::edition::Edition;
 //! use rustdoc::html::markdown::{IdMap, Markdown, ErrorCodes};
-//! use std::cell::RefCell;
 //!
 //! let s = "My *markdown* _text_";
 //! let mut id_map = IdMap::new();
-//! let md = Markdown(s, &[], RefCell::new(&mut id_map),
-//!                                   ErrorCodes::Yes, Edition::Edition2015, None);
+//! let md = Markdown(s, &[], &mut id_map, ErrorCodes::Yes, Edition::Edition2015, &None);
 //! let html = md.to_string();
 //! // ... something using html
 //! ```
@@ -51,7 +49,7 @@ pub struct Markdown<'a>(
     /// A list of link replacements.
     pub &'a [(String, String)],
     /// The current list of used header IDs.
-    pub RefCell<&'a mut IdMap>,
+    pub &'a mut IdMap,
     /// Whether to allow the use of explicit error codes in doctest lang strings.
     pub ErrorCodes,
     /// Default edition to use when parsing doctests (to add a `fn main`).
@@ -61,15 +59,15 @@ pub struct Markdown<'a>(
 /// A tuple struct like `Markdown` that renders the markdown with a table of contents.
 pub struct MarkdownWithToc<'a>(
     pub &'a str,
-    pub RefCell<&'a mut IdMap>,
+    pub &'a mut IdMap,
     pub ErrorCodes,
     pub Edition,
     pub &'a Option<Playground>,
 );
 /// A tuple struct like `Markdown` that renders the markdown escaping HTML tags.
 pub struct MarkdownHtml<'a>(
     pub &'a str,
-    pub RefCell<&'a mut IdMap>,
+    pub &'a mut IdMap,
     pub ErrorCodes,
     pub Edition,
     pub &'a Option<Playground>,
@@ -690,8 +688,7 @@ impl LangString {
 
 impl Markdown<'_> {
     pub fn to_string(self) -> String {
-        let Markdown(md, links, ids, codes, edition, playground) = self;
-        let mut ids = ids.borrow_mut();
+        let Markdown(md, links, mut ids, codes, edition, playground) = self;
 
         // This is actually common enough to special-case
         if md.is_empty() { return String::new(); }
@@ -719,8 +716,7 @@ impl Markdown<'_> {
 
 impl MarkdownWithToc<'_> {
     pub fn to_string(self) -> String {
-        let MarkdownWithToc(md, ref ids, codes, edition, playground) = self;
-        let mut ids = ids.borrow_mut();
+        let MarkdownWithToc(md, mut ids, codes, edition, playground) = self;
 
         let p = Parser::new_ext(md, opts());
 
@@ -741,8 +737,7 @@ impl MarkdownWithToc<'_> {
 
 impl MarkdownHtml<'_> {
     pub fn to_string(self) -> String {
-        let MarkdownHtml(md, ref ids, codes, edition, playground) = self;
-        let mut ids = ids.borrow_mut();
+        let MarkdownHtml(md, mut ids, codes, edition, playground) = self;
 
         // This is actually common enough to special-case
         if md.is_empty() { return String::new(); }
diff --git a/src/librustdoc/html/markdown/tests.rs b/src/librustdoc/html/markdown/tests.rs
@@ -73,8 +73,8 @@ fn test_lang_string_parse() {
 fn test_header() {
     fn t(input: &str, expect: &str) {
         let mut map = IdMap::new();
-        let output = Markdown(input, &[], RefCell::new(&mut map),
-                              ErrorCodes::Yes, DEFAULT_EDITION).to_string();
+        let output = Markdown(
+            input, &[], &mut map, ErrorCodes::Yes, DEFAULT_EDITION, &None).to_string();
         assert_eq!(output, expect, "original: {}", input);
     }
 
@@ -96,8 +96,8 @@ fn test_header() {
 fn test_header_ids_multiple_blocks() {
     let mut map = IdMap::new();
     fn t(map: &mut IdMap, input: &str, expect: &str) {
-        let output = Markdown(input, &[], RefCell::new(map),
-                              ErrorCodes::Yes, DEFAULT_EDITION).to_string();
+        let output = Markdown(input, &[], map,
+                              ErrorCodes::Yes, DEFAULT_EDITION, &None).to_string();
         assert_eq!(output, expect, "original: {}", input);
     }
 
@@ -134,8 +134,8 @@ fn test_plain_summary_line() {
 fn test_markdown_html_escape() {
     fn t(input: &str, expect: &str) {
         let mut idmap = IdMap::new();
-        let output = MarkdownHtml(input, RefCell::new(&mut idmap),
-                                  ErrorCodes::Yes, DEFAULT_EDITION).to_string();
+        let output = MarkdownHtml(input, &mut idmap,
+                                  ErrorCodes::Yes, DEFAULT_EDITION, &None).to_string();
         assert_eq!(output, expect, "original: {}", input);
     }
 
diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
@@ -2595,7 +2595,7 @@ fn render_markdown(w: &mut fmt::Formatter<'_>,
     write!(w, "<div class='docblock{}'>{}{}</div>",
            if is_hidden { " hidden" } else { "" },
            prefix,
-           Markdown(md_text, &links, RefCell::new(&mut ids),
+           Markdown(md_text, &links, &mut ids,
            cx.codes, cx.edition, &cx.playground).to_string())
 }
 
@@ -2961,8 +2961,7 @@ fn short_stability(item: &clean::Item, cx: &Context) -> Vec<String> {
 
         if let Some(note) = note {
             let mut ids = cx.id_map.borrow_mut();
-            let html = MarkdownHtml(
-                &note, RefCell::new(&mut ids), error_codes, cx.edition, &cx.playground);
+            let html = MarkdownHtml(&note, &mut ids, error_codes, cx.edition, &cx.playground);
             message.push_str(&format!(": {}", html.to_string()));
         }
         stability.push(format!("<div class='stab deprecated'>{}</div>", message));
@@ -3013,7 +3012,7 @@ fn short_stability(item: &clean::Item, cx: &Context) -> Vec<String> {
                 message,
                 MarkdownHtml(
                     &unstable_reason,
-                    RefCell::new(&mut ids),
+                    &mut ids,
                     error_codes,
                     cx.edition,
                     &cx.playground,
@@ -4247,7 +4246,7 @@ fn render_impl(w: &mut fmt::Formatter<'_>, cx: &Context, i: &Impl, link: AssocIt
         if let Some(ref dox) = cx.shared.maybe_collapsed_doc_value(&i.impl_item) {
             let mut ids = cx.id_map.borrow_mut();
             write!(w, "<div class='docblock'>{}</div>",
-                   Markdown(&*dox, &i.impl_item.links(), RefCell::new(&mut ids),
+                   Markdown(&*dox, &i.impl_item.links(), &mut ids,
                             cx.codes, cx.edition, &cx.playground).to_string())?;
         }
     }
diff --git a/src/librustdoc/markdown.rs b/src/librustdoc/markdown.rs
@@ -1,7 +1,6 @@
 use std::fs::File;
 use std::io::prelude::*;
 use std::path::PathBuf;
-use std::cell::RefCell;
 
 use errors;
 use testing;
@@ -83,9 +82,9 @@ pub fn render(
     let mut ids = IdMap::new();
     let error_codes = ErrorCodes::from(UnstableFeatures::from_environment().is_nightly_build());
     let text = if !options.markdown_no_toc {
-        MarkdownWithToc(text, RefCell::new(&mut ids), error_codes, edition, &playground).to_string()
+        MarkdownWithToc(text, &mut ids, error_codes, edition, &playground).to_string()
     } else {
-        Markdown(text, &[], RefCell::new(&mut ids), error_codes, edition, &playground).to_string()
+        Markdown(text, &[], &mut ids, error_codes, edition, &playground).to_string()
     };
 
     let err = write!(
diff --git a/src/tools/error_index_generator/main.rs b/src/tools/error_index_generator/main.rs
@@ -100,7 +100,7 @@ impl Formatter for HTMLFormatter {
                     url: String::from("https://play.rust-lang.org/"),
                 };
                 write!(output, "{}",
-                    Markdown(desc, &[], RefCell::new(&mut id_map),
+                    Markdown(desc, &[], &mut id_map,
                              ErrorCodes::Yes, DEFAULT_EDITION, &Some(playground)).to_string())?
             },
             None => write!(output, "<p>No description.</p>\n")?,
