Rollup merge of rust-lang#91928 - fee1-dead:constification1, r=oli-obk

Constify (most) `Option` methods

r? ``@oli-obk``

Author: matthiaskrgr

compiler/rustc_middle/src/query/mod.rs

@@ -771,11 +771,24 @@ rustc_queries! {
         desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
         cache_on_disk_if { true }
         load_cached(tcx, id) {
-            let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
-                .on_disk_cache().as_ref()
-                .and_then(|c| c.try_load_query_result(*tcx, id));
+            #[cfg(bootstrap)]
+            {
+                match match tcx.on_disk_cache().as_ref() {
+                    Some(c) => c.try_load_query_result(*tcx, id),
+                    None => None,
+                } {
+                    Some(x) => Some(&*tcx.arena.alloc(x)),
+                    None => None,
+                }
+            }
+            #[cfg(not(bootstrap))]
+            {
+                let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
+                    .on_disk_cache().as_ref()
+                    .and_then(|c| c.try_load_query_result(*tcx, id));
 
-            typeck_results.map(|x| &*tcx.arena.alloc(x))
+                typeck_results.map(|x| &*tcx.arena.alloc(x))
+            }
         }
     }
 

library/core/src/lib.rs

@@ -123,6 +123,7 @@
 #![feature(const_num_from_num)]
 #![feature(const_ops)]
 #![feature(const_option)]
+#![feature(const_option_ext)]
 #![feature(const_pin)]
 #![feature(const_replace)]
 #![feature(const_ptr_is_null)]