Treat other items as functions for the purpose of type-based search

src/librustdoc/html/render/search_index.rs

@@ -762,6 +762,22 @@ pub(crate) fn get_function_type_for_search<'tcx>(
         clean::FunctionItem(ref f) | clean::MethodItem(ref f, _) | clean::TyMethodItem(ref f) => {
             get_fn_inputs_and_outputs(f, tcx, impl_or_trait_generics, cache)
         }
+        clean::ConstantItem(ref c) => make_nullary_fn(&c.type_),
+        clean::StaticItem(ref s) => make_nullary_fn(&s.type_),
+        clean::StructFieldItem(ref t) => {
+            let Some(parent) = parent else {
+                return None;
+            };
+            let mut rgen: FxIndexMap<SimplifiedParam, (isize, Vec<RenderType>)> =
+                Default::default();
+            let output = get_index_type(t, vec![], &mut rgen);
+            let input = RenderType {
+                id: Some(RenderTypeId::DefId(parent)),
+                generics: None,
+                bindings: None,
+            };
+            (vec![input], vec![output], vec![])
+        }
         _ => return None,
     };
 
@@ -1273,6 +1289,17 @@ fn simplify_fn_constraint<'a, 'tcx>(
     res.push((ty_constrained_assoc, ty_constraints));
 }
 
+/// Create a fake nullary function.
+///
+/// Used to allow type-based search on constants and statics.
+fn make_nullary_fn(
+    clean_type: &clean::Type,
+) -> (Vec<RenderType>, Vec<RenderType>, Vec<Vec<RenderType>>) {
+    let mut rgen: FxIndexMap<SimplifiedParam, (isize, Vec<RenderType>)> = Default::default();
+    let output = get_index_type(clean_type, vec![], &mut rgen);
+    (vec![], vec![output], vec![])
+}
+
 /// Return the full list of types when bounds have been resolved.
 ///
 /// i.e. `fn foo<A: Display, B: Option<A>>(x: u32, y: B)` will return

tests/rustdoc-gui/search-tab.goml

@@ -79,7 +79,7 @@ set-window-size: (851, 600)
 
 // Check the size and count in tabs
 assert-text: ("#search-tabs > button:nth-child(1) > .count", " (25) ")
-assert-text: ("#search-tabs > button:nth-child(2) > .count", " (6)  ")
+assert-text: ("#search-tabs > button:nth-child(2) > .count", " (7)  ")
 assert-text: ("#search-tabs > button:nth-child(3) > .count", " (0)  ")
 store-property: ("#search-tabs > button:nth-child(1)", {"offsetWidth": buttonWidth})
 assert-property: ("#search-tabs > button:nth-child(2)", {"offsetWidth": |buttonWidth|})

tests/rustdoc-js-std/const-is-nullary-func.js

@@ -0,0 +1,6 @@
+const EXPECTED = {
+    'query': '-> char',
+    'others': [
+        { 'path': 'std::char', 'name': 'MAX' },
+    ],
+}

tests/rustdoc-js-std/field-is-unary-func.js

@@ -0,0 +1,7 @@
+const EXPECTED = {
+    // one of the only non-generic structs with public fields
+    'query': 'CpuidResult -> u32',
+    'others': [
+        { 'path': 'core::arch::x86::CpuidResult', 'name': 'eax' },
+    ],
+}