Auto merge of #125960 - jieyouxu:rollup-1s7f6lr, r=jieyouxu

Rollup of 8 pull requests

Successful merges:

 - #124486 (Add tracking issue and unstable book page for `"vectorcall"` ABI)
 - #125504 (Change pedantically incorrect OnceCell/OnceLock wording)
 - #125608 (Avoid follow-up errors if the number of generic parameters already doesn't match)
 - #125690 (ARM Target Docs Update)
 - #125750 (Align `Term` methods with `GenericArg` methods, add `Term::expect_*`)
 - #125818 (Handle no values cfgs with `--print=check-cfg`)
 - #125909 (rustdoc: add a regression test for a former blanket impl synthesis ICE)
 - #125919 (Remove stray "this")

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

clippy_lints/src/methods/iter_on_single_or_empty_collections.rs

@@ -42,7 +42,7 @@ fn is_arg_ty_unified_in_fn<'tcx>(
     cx.tcx.predicates_of(fn_id).predicates.iter().any(|(clause, _)| {
         clause
             .as_projection_clause()
-            .and_then(|p| p.map_bound(|p| p.term.ty()).transpose())
+            .and_then(|p| p.map_bound(|p| p.term.as_type()).transpose())
             .is_some_and(|ty| ty.skip_binder() == arg_ty_in_args)
     }) || fn_sig
         .inputs()

clippy_lints/src/needless_borrows_for_generic_args.rs

@@ -311,7 +311,7 @@ fn is_mixed_projection_predicate<'tcx>(
 ) -> bool {
     let generics = cx.tcx.generics_of(callee_def_id);
     // The predicate requires the projected type to equal a type parameter from the parent context.
-    if let Some(term_ty) = projection_predicate.term.ty()
+    if let Some(term_ty) = projection_predicate.term.as_type()
         && let ty::Param(term_param_ty) = term_ty.kind()
         && (term_param_ty.index as usize) < generics.parent_count
     {
@@ -370,7 +370,7 @@ fn replace_types<'tcx>(
         if replaced.insert(param_ty.index) {
             for projection_predicate in projection_predicates {
                 if projection_predicate.projection_term.self_ty() == param_ty.to_ty(cx.tcx)
-                    && let Some(term_ty) = projection_predicate.term.ty()
+                    && let Some(term_ty) = projection_predicate.term.as_type()
                     && let ty::Param(term_param_ty) = term_ty.kind()
                 {
                     let projection = projection_predicate

clippy_lints/src/unit_return_expecting_ord.rs

@@ -100,12 +100,12 @@ fn get_args_to_check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Ve
                     {
                         if ord_preds
                             .iter()
-                            .any(|ord| Some(ord.self_ty()) == return_ty_pred.term.ty())
+                            .any(|ord| Some(ord.self_ty()) == return_ty_pred.term.as_type())
                         {
                             args_to_check.push((i, "Ord".to_string()));
                         } else if partial_ord_preds
                             .iter()
-                            .any(|pord| pord.self_ty() == return_ty_pred.term.ty().unwrap())
+                            .any(|pord| pord.self_ty() == return_ty_pred.term.expect_type())
                         {
                             args_to_check.push((i, "PartialOrd".to_string()));
                         }

clippy_utils/src/ty.rs

@@ -750,7 +750,7 @@ pub fn ty_sig<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> Option<ExprFnSig<'t
                     let output = bounds
                         .projection_bounds()
                         .find(|p| lang_items.fn_once_output().map_or(false, |id| id == p.item_def_id()))
-                        .map(|p| p.map_bound(|p| p.term.ty().unwrap()));
+                        .map(|p| p.map_bound(|p| p.term.expect_type()));
                     Some(ExprFnSig::Trait(bound.map_bound(|b| b.args.type_at(0)), output, None))
                 },
                 _ => None,
@@ -798,7 +798,7 @@ fn sig_from_bounds<'tcx>(
                     // Multiple different fn trait impls. Is this even allowed?
                     return None;
                 }
-                output = Some(pred.kind().rebind(p.term.ty().unwrap()));
+                output = Some(pred.kind().rebind(p.term.expect_type()));
             },
             _ => (),
         }
@@ -836,7 +836,7 @@ fn sig_for_projection<'tcx>(cx: &LateContext<'tcx>, ty: AliasTy<'tcx>) -> Option
                     // Multiple different fn trait impls. Is this even allowed?
                     return None;
                 }
-                output = pred.kind().rebind(p.term.ty()).transpose();
+                output = pred.kind().rebind(p.term.as_type()).transpose();
             },
             _ => (),
         }