Auto merge of #124953 - compiler-errors:own-params, r=lcnr

Rename `Generics::params` to `Generics::own_params`

I hope this makes it slightly more obvious that `generics.own_params` is insufficient when considering nested items. I didn't actually audit any of the usages, for the record.

r? lcnr

src/librustdoc/clean/auto_trait.rs

@@ -150,7 +150,7 @@ fn clean_param_env<'tcx>(
     let generics = tcx.generics_of(item_def_id);
 
     let params: ThinVec<_> = generics
-        .params
+        .own_params
         .iter()
         .inspect(|param| {
             if cfg!(debug_assertions) {
@@ -326,7 +326,7 @@ fn clean_region_outlives_constraints<'tcx>(
     }
 
     let region_params: FxIndexSet<_> = generics
-        .params
+        .own_params
         .iter()
         .filter_map(|param| match param.kind {
             ty::GenericParamDefKind::Lifetime => Some(param.name),

src/librustdoc/clean/mod.rs

@@ -795,7 +795,7 @@ fn clean_ty_generics<'tcx>(
     let mut impl_trait = BTreeMap::<u32, Vec<GenericBound>>::default();
 
     let params: ThinVec<_> = gens
-        .params
+        .own_params
         .iter()
         .filter(|param| match param.kind {
             ty::GenericParamDefKind::Lifetime => !param.is_anonymous_lifetime(),
@@ -1988,7 +1988,7 @@ impl<'tcx> ContainerTy<'_, 'tcx> {
                 let generics = tcx.generics_of(container);
                 debug_assert_eq!(generics.parent_count, 0);
 
-                let param = generics.params[index].def_id;
+                let param = generics.own_params[index].def_id;
                 let default = tcx.object_lifetime_default(param);
                 match default {
                     rbv::ObjectLifetimeDefault::Param(lifetime) => {

src/tools/clippy/clippy_lints/src/dereference.rs

@@ -382,7 +382,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> {
                                         cx,
                                         impl_ty,
                                         trait_id,
-                                        &args[..cx.tcx.generics_of(trait_id).params.len() - 1],
+                                        &args[..cx.tcx.generics_of(trait_id).own_params.len() - 1],
                                     )
                                 {
                                     false

src/tools/clippy/clippy_lints/src/derive.rs

@@ -480,7 +480,7 @@ fn param_env_for_derived_eq(tcx: TyCtxt<'_>, did: DefId, eq_trait_id: DefId) ->
     // Vec<(param_def, needs_eq)>
     let mut params = tcx
         .generics_of(did)
-        .params
+        .own_params
         .iter()
         .map(|p| (p, matches!(p.kind, GenericParamDefKind::Type { .. })))
         .collect::<Vec<_>>();

src/tools/clippy/clippy_lints/src/implied_bounds_in_impls.rs

@@ -148,7 +148,7 @@ fn try_resolve_type<'tcx>(
     match args.get(index - 1) {
         Some(GenericArg::Type(ty)) => Some(lower_ty(tcx, ty)),
         Some(_) => None,
-        None => Some(tcx.type_of(generics.params[index].def_id).skip_binder()),
+        None => Some(tcx.type_of(generics.own_params[index].def_id).skip_binder()),
     }
 }
 

src/tools/clippy/clippy_lints/src/iter_without_into_iter.rs

@@ -225,7 +225,7 @@ impl {self_ty_without_ref} {{
             && let ImplItemKind::Fn(sig, _) = item.kind
             && let FnRetTy::Return(ret) = sig.decl.output
             && is_nameable_in_impl_trait(ret)
-            && cx.tcx.generics_of(item_did).params.is_empty()
+            && cx.tcx.generics_of(item_did).own_params.is_empty()
             && sig.decl.implicit_self == expected_implicit_self
             && sig.decl.inputs.len() == 1
             && let Some(imp) = get_parent_as_impl(cx.tcx, item.hir_id())

src/tools/clippy/clippy_lints/src/mismatching_type_param_order.rs

@@ -76,7 +76,7 @@ impl<'tcx> LateLintPass<'tcx> for TypeParamMismatch {
             };
 
             // get the names of the generic parameters in the type
-            let type_params = &cx.tcx.generics_of(defid).params;
+            let type_params = &cx.tcx.generics_of(defid).own_params;
             let type_param_names: Vec<_> = type_params
                 .iter()
                 .filter_map(|p| match p.kind {

src/tools/clippy/clippy_utils/src/ty.rs

@@ -1070,11 +1070,11 @@ pub fn approx_ty_size<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> u64 {
 fn assert_generic_args_match<'tcx>(tcx: TyCtxt<'tcx>, did: DefId, args: &[GenericArg<'tcx>]) {
     let g = tcx.generics_of(did);
     let parent = g.parent.map(|did| tcx.generics_of(did));
-    let count = g.parent_count + g.params.len();
+    let count = g.parent_count + g.own_params.len();
     let params = parent
-        .map_or([].as_slice(), |p| p.params.as_slice())
+        .map_or([].as_slice(), |p| p.own_params.as_slice())
         .iter()
-        .chain(&g.params)
+        .chain(&g.own_params)
         .map(|x| &x.kind);
 
     assert!(

src/tools/clippy/clippy_utils/src/ty/type_certainty/mod.rs

@@ -176,7 +176,7 @@ fn qpath_certainty(cx: &LateContext<'_>, qpath: &QPath<'_>, resolves_to_type: bo
             .get(*lang_item)
             .map_or(Certainty::Uncertain, |def_id| {
                 let generics = cx.tcx.generics_of(def_id);
-                if generics.parent_count == 0 && generics.params.is_empty() {
+                if generics.parent_count == 0 && generics.own_params.is_empty() {
                     Certainty::Certain(if resolves_to_type { Some(def_id) } else { None })
                 } else {
                     Certainty::Uncertain
@@ -206,7 +206,7 @@ fn path_segment_certainty(
             // Checking `res_generics_def_id(..)` before calling `generics_of` avoids an ICE.
             if cx.tcx.res_generics_def_id(path_segment.res).is_some() {
                 let generics = cx.tcx.generics_of(def_id);
-                let count = generics.params.len() - usize::from(generics.host_effect_index.is_some());
+                let count = generics.own_params.len() - usize::from(generics.host_effect_index.is_some());
                 let lhs = if (parent_certainty.is_certain() || generics.parent_count == 0) && count == 0 {
                     Certainty::Certain(None)
                 } else {
@@ -299,7 +299,7 @@ fn type_is_inferable_from_arguments(cx: &LateContext<'_>, expr: &Expr<'_>) -> bo
     let fn_sig = cx.tcx.fn_sig(callee_def_id).skip_binder();
 
     // Check that all type parameters appear in the functions input types.
-    (0..(generics.parent_count + generics.params.len()) as u32).all(|index| {
+    (0..(generics.parent_count + generics.own_params.len()) as u32).all(|index| {
         Some(index as usize) == generics.host_effect_index
             || fn_sig
                 .inputs()