nit: Make get_infer_ret_ty name more consistent with is_suggestable_infer_ty

Author: compiler-errors

Diff for: compiler/rustc_hir/src/hir.rs

@@ -3387,7 +3387,7 @@ impl<'hir> FnRetTy<'hir> {
         }
     }
 
-    pub fn get_infer_ret_ty(&self) -> Option<&'hir Ty<'hir>> {
+    pub fn is_suggestable_infer_ty(&self) -> Option<&'hir Ty<'hir>> {
         if let Self::Return(ty) = self {
             if ty.is_suggestable_infer_ty() {
                 return Some(*ty);

Diff for: compiler/rustc_hir_analysis/src/collect.rs

@@ -1371,7 +1371,7 @@ fn lower_fn_sig_recovering_infer_ret_ty<'tcx>(
     generics: &'tcx hir::Generics<'tcx>,
     def_id: LocalDefId,
 ) -> ty::PolyFnSig<'tcx> {
-    if let Some(infer_ret_ty) = sig.decl.output.get_infer_ret_ty() {
+    if let Some(infer_ret_ty) = sig.decl.output.is_suggestable_infer_ty() {
         return recover_infer_ret_ty(icx, infer_ret_ty, generics, def_id);
     }
 

Diff for: compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs

@@ -187,7 +187,7 @@ impl TaitConstraintLocator<'_> {
             "foreign items cannot constrain opaque types",
         );
         if let Some(hir_sig) = hir_node.fn_sig()
-            && hir_sig.decl.output.get_infer_ret_ty().is_some()
+            && hir_sig.decl.output.is_suggestable_infer_ty().is_some()
         {
             let guar = self.tcx.dcx().span_delayed_bug(
                 hir_sig.decl.output.span(),

Diff for: compiler/rustc_hir_typeck/src/lib.rs

@@ -150,7 +150,7 @@ fn typeck_with_fallback<'tcx>(
     let mut fcx = FnCtxt::new(&root_ctxt, param_env, def_id);
 
     if let Some(hir::FnSig { header, decl, .. }) = node.fn_sig() {
-        let fn_sig = if decl.output.get_infer_ret_ty().is_some() {
+        let fn_sig = if decl.output.is_suggestable_infer_ty().is_some() {
             fcx.lowerer().lower_fn_ty(id, header.safety, header.abi, decl, None, None)
         } else {
             tcx.fn_sig(def_id).instantiate_identity()

Diff for: compiler/rustc_ty_utils/src/sig_types.rs

@@ -31,7 +31,7 @@ pub fn walk_types<'tcx, V: SpannedTypeVisitor<'tcx>>(
             // If the type of the item uses `_`, we're gonna error out anyway, but
             // typeck (which type_of invokes below), will call back into opaque_types_defined_by
             // causing a cycle. So we just bail out in this case.
-            if hir_sig.output.get_infer_ret_ty().is_some() {
+            if hir_sig.output.is_suggestable_infer_ty().is_some() {
                 return V::Result::output();
             }
             let ty_sig = tcx.fn_sig(item).instantiate_identity();