Auto merge of #68142 - Centril:rollup-dl232e9, r=Centril

Rollup of 6 pull requests

Successful merges:

 - #67494 (Constify more of alloc::Layout)
 - #67867 (Correctly check for opaque types in `assoc_ty_def`)
 - #67948 (Galloping search for binary_search_util)
 - #68045 (Move more of `rustc::lint` into `rustc_lint`)
 - #68089 (Unstabilize `Vec::remove_item`)
 - #68108 (Add suggestions when encountering chained comparisons)

Failed merges:

r? @ghost

1 files changed, 8 insertions, 4 deletions

diff --git a/src/libcore/alloc.rs b/src/libcore/alloc.rs
index 163f9170b8b..4354e1c7b5f 100644
--- a/src/libcore/alloc.rs
+++ b/src/libcore/alloc.rs
@@ -64,8 +64,9 @@ impl Layout {
     ///    must not overflow (i.e., the rounded value must be less than
     ///    `usize::MAX`).
     #[stable(feature = "alloc_layout", since = "1.28.0")]
+    #[rustc_const_unstable(feature = "const_alloc_layout", issue = "67521")]
     #[inline]
-    pub fn from_size_align(size: usize, align: usize) -> Result<Self, LayoutErr> {
+    pub const fn from_size_align(size: usize, align: usize) -> Result<Self, LayoutErr> {
         if !align.is_power_of_two() {
             return Err(LayoutErr { private: () });
         }
@@ -106,15 +107,17 @@ impl Layout {
 
     /// The minimum size in bytes for a memory block of this layout.
     #[stable(feature = "alloc_layout", since = "1.28.0")]
+    #[rustc_const_unstable(feature = "const_alloc_layout", issue = "67521")]
     #[inline]
-    pub fn size(&self) -> usize {
+    pub const fn size(&self) -> usize {
         self.size_
     }
 
     /// The minimum byte alignment for a memory block of this layout.
     #[stable(feature = "alloc_layout", since = "1.28.0")]
+    #[rustc_const_unstable(feature = "const_alloc_layout", issue = "67521")]
     #[inline]
-    pub fn align(&self) -> usize {
+    pub const fn align(&self) -> usize {
         self.align_.get()
     }
 
@@ -181,8 +184,9 @@ impl Layout {
     /// address for the whole allocated block of memory. One way to
     /// satisfy this constraint is to ensure `align <= self.align()`.
     #[unstable(feature = "alloc_layout_extra", issue = "55724")]
+    #[rustc_const_unstable(feature = "const_alloc_layout", issue = "67521")]
     #[inline]
-    pub fn padding_needed_for(&self, align: usize) -> usize {
+    pub const fn padding_needed_for(&self, align: usize) -> usize {
         let len = self.size();
 
         // Rounded up value is: