Clean render_impl arguments

src/librustdoc/html/render/mod.rs

@@ -711,13 +711,15 @@ fn render_impls(
                 containing_item,
                 assoc_link,
                 RenderMode::Normal,
-                true,
                 None,
-                false,
-                true,
-                true,
                 &[],
-                true,
+                ImplRenderingParameters {
+                    show_def_docs: true,
+                    is_on_foreign_type: false,
+                    show_default_items: true,
+                    show_non_assoc_items: true,
+                    toggle_open_by_default: true,
+                },
             );
             buffer.into_inner()
         })
@@ -1052,13 +1054,15 @@ fn render_assoc_items(
                 containing_item,
                 AssocItemLink::Anchor(None),
                 render_mode,
-                true,
                 None,
-                false,
-                true,
-                true,
                 &[],
-                true,
+                ImplRenderingParameters {
+                    show_def_docs: true,
+                    is_on_foreign_type: false,
+                    show_default_items: true,
+                    show_non_assoc_items: true,
+                    toggle_open_by_default: true,
+                },
             );
         }
     }
@@ -1248,6 +1252,16 @@ fn notable_traits_decl(decl: &clean::FnDecl, cx: &Context<'_>) -> String {
     out.into_inner()
 }
 
+#[derive(Clone, Copy, Debug)]
+struct ImplRenderingParameters {
+    show_def_docs: bool,
+    is_on_foreign_type: bool,
+    show_default_items: bool,
+    /// Whether or not to show methods.
+    show_non_assoc_items: bool,
+    toggle_open_by_default: bool,
+}
+
 fn render_impl(
     w: &mut Buffer,
     cx: &Context<'_>,
@@ -1255,16 +1269,9 @@ fn render_impl(
     parent: &clean::Item,
     link: AssocItemLink<'_>,
     render_mode: RenderMode,
-    show_def_docs: bool,
     use_absolute: Option<bool>,
-    is_on_foreign_type: bool,
-    show_default_items: bool,
-    // It'll exclude methods.
-    show_non_assoc_items: bool,
-    // This argument is used to reference same type with different paths to avoid duplication
-    // in documentation pages for trait with automatic implementations like "Send" and "Sync".
     aliases: &[String],
-    toggle_open_by_default: bool,
+    rendering_params: ImplRenderingParameters,
 ) {
     let cache = cx.cache();
     let traits = &cache.traits;
@@ -1287,13 +1294,12 @@ fn doc_impl_item(
         render_mode: RenderMode,
         is_default_item: bool,
         trait_: Option<&clean::Trait>,
-        show_def_docs: bool,
-        show_non_assoc_items: bool,
+        rendering_params: ImplRenderingParameters,
     ) {
         let item_type = item.type_();
         let name = item.name.as_ref().unwrap();
 
-        let render_method_item = show_non_assoc_items
+        let render_method_item = rendering_params.show_non_assoc_items
             && match render_mode {
                 RenderMode::Normal => true,
                 RenderMode::ForDeref { mut_: deref_mut_ } => {
@@ -1322,18 +1328,32 @@ fn doc_impl_item(
                         } else {
                             // In case the item isn't documented,
                             // provide short documentation from the trait.
-                            document_short(&mut doc_buffer, it, cx, link, parent, show_def_docs);
+                            document_short(
+                                &mut doc_buffer,
+                                it,
+                                cx,
+                                link,
+                                parent,
+                                rendering_params.show_def_docs,
+                            );
                         }
                     }
                 } else {
                     document_item_info(&mut info_buffer, cx, item, Some(parent));
-                    if show_def_docs {
+                    if rendering_params.show_def_docs {
                         document_full(&mut doc_buffer, item, cx);
                         short_documented = false;
                     }
                 }
             } else {
-                document_short(&mut doc_buffer, item, cx, link, parent, show_def_docs);
+                document_short(
+                    &mut doc_buffer,
+                    item,
+                    cx,
+                    link,
+                    parent,
+                    rendering_params.show_def_docs,
+                );
             }
         }
         let w = if short_documented && trait_.is_some() { interesting } else { boring };
@@ -1465,8 +1485,7 @@ fn doc_impl_item(
             render_mode,
             false,
             trait_.map(|t| &t.trait_),
-            show_def_docs,
-            show_non_assoc_items,
+            rendering_params,
         );
     }
 
@@ -1479,8 +1498,7 @@ fn render_default_items(
         parent: &clean::Item,
         containing_item: &clean::Item,
         render_mode: RenderMode,
-        show_def_docs: bool,
-        show_non_assoc_items: bool,
+        rendering_params: ImplRenderingParameters,
     ) {
         for trait_item in &t.items {
             let n = trait_item.name;
@@ -1502,8 +1520,7 @@ fn render_default_items(
                 render_mode,
                 true,
                 Some(t),
-                show_def_docs,
-                show_non_assoc_items,
+                rendering_params,
             );
         }
     }
@@ -1512,7 +1529,7 @@ fn render_default_items(
     // default items which weren't overridden in the implementation block.
     // We don't emit documentation for default items if they appear in the
     // Implementations on Foreign Types or Implementors sections.
-    if show_default_items {
+    if rendering_params.show_default_items {
         if let Some(t) = trait_ {
             render_default_items(
                 &mut default_impl_items,
@@ -1523,8 +1540,7 @@ fn render_default_items(
                 &i.impl_item,
                 parent,
                 render_mode,
-                show_def_docs,
-                show_non_assoc_items,
+                rendering_params,
             );
         }
     }
@@ -1535,7 +1551,7 @@ fn render_default_items(
             write!(
                 w,
                 "<details class=\"rustdoc-toggle implementors-toggle\"{}>",
-                if toggle_open_by_default { " open" } else { "" }
+                if rendering_params.toggle_open_by_default { " open" } else { "" }
             );
             write!(w, "<summary>")
         }
@@ -1545,9 +1561,9 @@ fn render_default_items(
             i,
             parent,
             parent,
-            show_def_docs,
+            rendering_params.show_def_docs,
             use_absolute,
-            is_on_foreign_type,
+            rendering_params.is_on_foreign_type,
             aliases,
         );
         if toggled {

src/librustdoc/html/render/print_item.rs

@@ -17,6 +17,7 @@
     collect_paths_for_type, document, ensure_trailing_slash, item_ty_to_strs, notable_traits_decl,
     render_assoc_item, render_assoc_items, render_attributes_in_code, render_attributes_in_pre,
     render_impl, render_stability_since_raw, write_srclink, AssocItemLink, Context,
+    ImplRenderingParameters,
 };
 use crate::clean::{self, GetDefId};
 use crate::formats::item_type::ItemType;
@@ -735,13 +736,15 @@ fn trait_item(w: &mut Buffer, cx: &Context<'_>, m: &clean::Item, t: &clean::Item
                     it,
                     assoc_link,
                     RenderMode::Normal,
-                    false,
                     None,
-                    true,
-                    false,
-                    true,
                     &[],
-                    false,
+                    ImplRenderingParameters {
+                        show_def_docs: false,
+                        is_on_foreign_type: true,
+                        show_default_items: false,
+                        show_non_assoc_items: true,
+                        toggle_open_by_default: false,
+                    },
                 );
             }
         }
@@ -1396,13 +1399,15 @@ fn render_implementor(
         trait_,
         AssocItemLink::Anchor(None),
         RenderMode::Normal,
-        false,
         Some(use_absolute),
-        false,
-        false,
-        false,
         aliases,
-        false,
+        ImplRenderingParameters {
+            show_def_docs: false,
+            is_on_foreign_type: false,
+            show_default_items: false,
+            show_non_assoc_items: false,
+            toggle_open_by_default: false,
+        },
     );
 }