rustc_metadata: Rename item_children(_untracked) to module_children(_untracked)

And `each_child_of_item` to `for_each_module_child`

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -1079,7 +1079,12 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
     /// including both proper items and reexports.
     /// Module here is understood in name resolution sense - it can be a `mod` item,
     /// or a crate root, or an enum, or a trait.
-    fn each_child_of_item(&self, id: DefIndex, mut callback: impl FnMut(Export), sess: &Session) {
+    fn for_each_module_child(
+        &self,
+        id: DefIndex,
+        mut callback: impl FnMut(Export),
+        sess: &Session,
+    ) {
         if let Some(data) = &self.root.proc_macro_data {
             // If we are loading as a proc macro, we want to return
             // the view of this crate as a proc macro crate.
@@ -1164,7 +1169,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
                 }
             }
             EntryKind::Enum(..) | EntryKind::Trait(..) => {}
-            _ => bug!("`each_child_of_item` is called on a non-module: {:?}", self.def_kind(id)),
+            _ => bug!("`for_each_module_child` is called on a non-module: {:?}", self.def_kind(id)),
         }
     }
 

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -196,9 +196,9 @@ provide! { <'tcx> tcx, def_id, other, cdata,
         let r = *cdata.dep_kind.lock();
         r
     }
-    item_children => {
+    module_children => {
         let mut result = SmallVec::<[_; 8]>::new();
-        cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
+        cdata.for_each_module_child(def_id.index, |child| result.push(child), tcx.sess);
         tcx.arena.alloc_slice(&result)
     }
     defined_lib_features => { cdata.get_lib_features(tcx) }
@@ -342,7 +342,7 @@ pub(in crate::rmeta) fn provide(providers: &mut Providers) {
             };
 
             while let Some(def) = bfs_queue.pop_front() {
-                for child in tcx.item_children(def).iter() {
+                for child in tcx.module_children(def).iter() {
                     add_child(bfs_queue, child, def);
                 }
             }
@@ -388,9 +388,9 @@ impl CStore {
         self.get_crate_data(def.krate).get_visibility(def.index)
     }
 
-    pub fn item_children_untracked(&self, def_id: DefId, sess: &Session) -> Vec<Export> {
+    pub fn module_children_untracked(&self, def_id: DefId, sess: &Session) -> Vec<Export> {
         let mut result = vec![];
-        self.get_crate_data(def_id.krate).each_child_of_item(
+        self.get_crate_data(def_id.krate).for_each_module_child(
             def_id.index,
             |child| result.push(child),
             sess,

compiler/rustc_middle/src/query/mod.rs

@@ -1528,7 +1528,7 @@ rustc_queries! {
         desc { "fetching what a crate is named" }
         separate_provide_extern
     }
-    query item_children(def_id: DefId) -> &'tcx [Export] {
+    query module_children(def_id: DefId) -> &'tcx [Export] {
         desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
         separate_provide_extern
     }

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -458,7 +458,7 @@ pub trait PrettyPrinter<'tcx>:
                 // that's public and whose identifier isn't `_`.
                 let reexport = self
                     .tcx()
-                    .item_children(visible_parent)
+                    .module_children(visible_parent)
                     .iter()
                     .filter(|child| child.res.opt_def_id() == Some(def_id))
                     .find(|child| child.vis.is_public() && child.ident.name != kw::Underscore)
@@ -2602,7 +2602,7 @@ fn for_each_def(tcx: TyCtxt<'_>, mut collect_fn: impl for<'b> FnMut(&'b Ident, N
 
     // Iterate external crate defs but be mindful about visibility
     while let Some(def) = queue.pop() {
-        for child in tcx.item_children(def).iter() {
+        for child in tcx.module_children(def).iter() {
             if !child.vis.is_public() {
                 continue;
             }

compiler/rustc_resolve/src/build_reduced_graph.rs

@@ -214,7 +214,7 @@ impl<'a> Resolver<'a> {
     }
 
     crate fn build_reduced_graph_external(&mut self, module: Module<'a>) {
-        for child in self.cstore().item_children_untracked(module.def_id(), self.session) {
+        for child in self.cstore().module_children_untracked(module.def_id(), self.session) {
             let parent_scope = ParentScope::module(module, self);
             BuildReducedGraphVisitor { r: self, parent_scope }
                 .build_reduced_graph_for_external_crate_res(child);

compiler/rustc_typeck/src/check/method/suggest.rs

@@ -1321,7 +1321,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 if Some(*parent_did) != self.tcx.parent(*trait_did)
                     && self
                         .tcx
-                        .item_children(*parent_did)
+                        .module_children(*parent_did)
                         .iter()
                         .filter(|child| child.res.opt_def_id() == Some(*trait_did))
                         .all(|child| child.ident.name == kw::Underscore)

src/librustdoc/clean/inline.rs

@@ -516,7 +516,7 @@ fn build_module(
     // If we're re-exporting a re-export it may actually re-export something in
     // two namespaces, so the target may be listed twice. Make sure we only
     // visit each node at most once.
-    for &item in cx.tcx.item_children(did).iter() {
+    for &item in cx.tcx.module_children(did).iter() {
         if item.vis.is_public() {
             let res = item.res.expect_non_local();
             if let Some(def_id) = res.mod_def_id() {

src/librustdoc/clean/types.rs

@@ -265,7 +265,7 @@ impl ExternalCrate {
                 })
                 .collect()
         } else {
-            tcx.item_children(root).iter().map(|item| item.res).filter_map(as_keyword).collect()
+            tcx.module_children(root).iter().map(|item| item.res).filter_map(as_keyword).collect()
         }
     }
 
@@ -333,7 +333,7 @@ impl ExternalCrate {
                 })
                 .collect()
         } else {
-            tcx.item_children(root).iter().map(|item| item.res).filter_map(as_primitive).collect()
+            tcx.module_children(root).iter().map(|item| item.res).filter_map(as_primitive).collect()
         }
     }
 }

src/librustdoc/visit_lib.rs

@@ -53,7 +53,7 @@ impl<'a, 'tcx> LibEmbargoVisitor<'a, 'tcx> {
             return;
         }
 
-        for item in self.tcx.item_children(def_id).iter() {
+        for item in self.tcx.module_children(def_id).iter() {
             if let Some(def_id) = item.res.opt_def_id() {
                 if self.tcx.def_key(def_id).parent.map_or(false, |d| d == def_id.index)
                     || item.vis.is_public()

src/tools/clippy/clippy_lints/src/macro_use.rs

@@ -96,7 +96,7 @@ impl<'tcx> LateLintPass<'tcx> for MacroUseImports {
             if let Res::Def(DefKind::Mod, id) = path.res;
             if !id.is_local();
             then {
-                for kid in cx.tcx.item_children(id).iter() {
+                for kid in cx.tcx.module_children(id).iter() {
                     if let Res::Def(DefKind::Macro(_mac_type), mac_id) = kid.res {
                         let span = mac_attr.span;
                         let def_path = cx.tcx.def_path_str(mac_id);

src/tools/clippy/clippy_lints/src/utils/internal_lints.rs

@@ -924,7 +924,7 @@ pub fn check_path(cx: &LateContext<'_>, path: &[&str]) -> bool {
         let lang_item_path = cx.get_def_path(*item_def_id);
         if path_syms.starts_with(&lang_item_path) {
             if let [item] = &path_syms[lang_item_path.len()..] {
-                for child in cx.tcx.item_children(*item_def_id) {
+                for child in cx.tcx.module_children(*item_def_id) {
                     if child.ident.name == *item {
                         return true;
                     }
@@ -984,7 +984,7 @@ impl<'tcx> LateLintPass<'tcx> for InterningDefinedSymbol {
 
         for &module in &[&paths::KW_MODULE, &paths::SYM_MODULE] {
             if let Some(def_id) = path_to_res(cx, module).opt_def_id() {
-                for item in cx.tcx.item_children(def_id).iter() {
+                for item in cx.tcx.module_children(def_id).iter() {
                     if_chain! {
                         if let Res::Def(DefKind::Const, item_def_id) = item.res;
                         let ty = cx.tcx.type_of(item_def_id);

src/tools/clippy/clippy_utils/src/lib.rs

@@ -525,7 +525,7 @@ pub fn path_to_res(cx: &LateContext<'_>, path: &[&str]) -> Res {
     fn item_child_by_name<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, name: &str) -> Option<Res> {
         match tcx.def_kind(def_id) {
             DefKind::Mod | DefKind::Enum | DefKind::Trait => tcx
-                .item_children(def_id)
+                .module_children(def_id)
                 .iter()
                 .find(|item| item.ident.name.as_str() == name)
                 .map(|child| child.res.expect_non_local()),

src/tools/clippy/tests/ui/macro_use_imports.fixed

@@ -40,7 +40,7 @@ mod a {
     }
 }
 
-// issue #7015, ICE due to calling `item_children` with local `DefId`
+// issue #7015, ICE due to calling `module_children` with local `DefId`
 #[macro_use]
 use a as b;
 

src/tools/clippy/tests/ui/macro_use_imports.rs

@@ -40,7 +40,7 @@ mod a {
     }
 }
 
-// issue #7015, ICE due to calling `item_children` with local `DefId`
+// issue #7015, ICE due to calling `module_children` with local `DefId`
 #[macro_use]
 use a as b;