TODO replace co_alloc_metadata_num_slots_with_preference_global(...)

Author: peter-lyons-kehl

library/alloc/src/lib.rs

@@ -291,5 +291,6 @@ use crate::alloc::Global;
 /// See also `core::alloc::co_alloc_metadata_num_slots_with_preference`.
 #[unstable(feature = "global_co_alloc", issue = "none")]
 pub const fn co_alloc_metadata_num_slots_with_preference_global(coop_preferred: bool) -> usize {
-    if Global::IS_CO_ALLOCATOR && coop_preferred { 1 } else { 0 }
+    // FIXME or replace any calls with core::alloc::co_alloc_metadata_num_slots_with_preference_specific::<Global>(COOP_PREFERRED). Then rename co_alloc_metadata_num_slots_with_preference_specific to co_alloc_metadata_num_slots_with_preference. See raw_vec.rs.
+    if /*Global::IS_CO_ALLOCATOR*/ true && coop_preferred { 1 } else { 0 }
 }

library/alloc/src/raw_vec.rs

@@ -70,7 +70,7 @@ pub(crate) struct RawVec<
 
 impl<T, const COOP_PREFERRED: bool> RawVec<T, Global, COOP_PREFERRED>
 where
-    [(); crate::co_alloc_metadata_num_slots_with_preference_global(COOP_PREFERRED)]:,
+    [(); core::alloc::co_alloc_metadata_num_slots_with_preference_specific::<Global>(COOP_PREFERRED)]:,
 {
     /// HACK(Centril): This exists because stable `const fn` can only call stable `const fn`, so
     /// they cannot call `Self::new()`.

library/core/src/alloc/mod.rs

@@ -94,8 +94,9 @@ pub type SliceAndMetaResult = Result<SliceAndMeta, AllocError>;
 
 #[unstable(feature = "global_co_alloc", issue = "none")]
 pub const fn co_alloc_metadata_num_slots<A: Allocator>() -> usize {
-    if true {
-        panic!("FIXME - consider removing co_alloc_metadata_num_slots()");
+    // @FIXME later
+    if false {
+        panic!("FIXME - consider replacing co_alloc_metadata_num_slots() with co_alloc_metadata_num_slots_with_preference_specific(bool), and adding const flags as appropriate.");
     }
     if A::IS_CO_ALLOCATOR { 1 } else { 0 }
 }