Auto merge of #112716 - compiler-errors:rollup-h77daia, r=compiler-errors

Rollup of 7 pull requests

Successful merges:

 - #111074 (Relax implicit `T: Sized` bounds on `BufReader<T>`, `BufWriter<T>` and `LineWriter<T>`)
 - #112226 (std: available_parallelism using native netbsd api first)
 - #112474 (Support 128-bit enum variant in debuginfo codegen)
 - #112662 (`#[lang_item]` for `core::ptr::Unique`)
 - #112665 (Make assumption functions in new solver take `Binder<'tcx, Clause<'tcx>>`)
 - #112684 (Disable alignment checks on i686-pc-windows-msvc)
 - #112706 (Add `SyntaxContext::is_root`)

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

3 files changed, 17 insertions, 11 deletions

diff --git a/compiler/rustc_span/src/hygiene.rs b/compiler/rustc_span/src/hygiene.rs
index 0c7e36b3bef..9f2ff437842 100644
--- a/compiler/rustc_span/src/hygiene.rs
+++ b/compiler/rustc_span/src/hygiene.rs
@@ -507,7 +507,7 @@ impl HygieneData {
             self.normalize_to_macro_rules(call_site_ctxt)
         };
 
-        if call_site_ctxt == SyntaxContext::root() {
+        if call_site_ctxt.is_root() {
             return self.apply_mark_internal(ctxt, expn_id, transparency);
         }
 
@@ -671,12 +671,17 @@ impl SyntaxContext {
     }
 
     #[inline]
-    pub(crate) fn as_u32(self) -> u32 {
+    pub const fn is_root(self) -> bool {
+        self.0 == SyntaxContext::root().as_u32()
+    }
+
+    #[inline]
+    pub(crate) const fn as_u32(self) -> u32 {
         self.0
     }
 
     #[inline]
-    pub(crate) fn from_u32(raw: u32) -> SyntaxContext {
+    pub(crate) const fn from_u32(raw: u32) -> SyntaxContext {
         SyntaxContext(raw)
     }
 
@@ -1500,7 +1505,7 @@ impl<CTX: HashStableContext> HashStable<CTX> for SyntaxContext {
         const TAG_EXPANSION: u8 = 0;
         const TAG_NO_EXPANSION: u8 = 1;
 
-        if *self == SyntaxContext::root() {
+        if self.is_root() {
             TAG_NO_EXPANSION.hash_stable(ctx, hasher);
         } else {
             TAG_EXPANSION.hash_stable(ctx, hasher);
diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
index eae3f0fa041..e7a53c63e83 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -826,9 +826,9 @@ impl Span {
         // Return the macro span on its own to avoid weird diagnostic output. It is preferable to
         // have an incomplete span than a completely nonsensical one.
         if span_data.ctxt != end_data.ctxt {
-            if span_data.ctxt == SyntaxContext::root() {
+            if span_data.ctxt.is_root() {
                 return end;
-            } else if end_data.ctxt == SyntaxContext::root() {
+            } else if end_data.ctxt.is_root() {
                 return self;
             }
             // Both spans fall within a macro.
@@ -837,7 +837,7 @@ impl Span {
         Span::new(
             cmp::min(span_data.lo, end_data.lo),
             cmp::max(span_data.hi, end_data.hi),
-            if span_data.ctxt == SyntaxContext::root() { end_data.ctxt } else { span_data.ctxt },
+            if span_data.ctxt.is_root() { end_data.ctxt } else { span_data.ctxt },
             if span_data.parent == end_data.parent { span_data.parent } else { None },
         )
     }
@@ -855,7 +855,7 @@ impl Span {
         Span::new(
             span.hi,
             end.lo,
-            if end.ctxt == SyntaxContext::root() { end.ctxt } else { span.ctxt },
+            if end.ctxt.is_root() { end.ctxt } else { span.ctxt },
             if span.parent == end.parent { span.parent } else { None },
         )
     }
@@ -879,9 +879,9 @@ impl Span {
         // Return the macro span on its own to avoid weird diagnostic output. It is preferable to
         // have an incomplete span than a completely nonsensical one.
         if span_data.ctxt != end_data.ctxt {
-            if span_data.ctxt == SyntaxContext::root() {
+            if span_data.ctxt.is_root() {
                 return end;
-            } else if end_data.ctxt == SyntaxContext::root() {
+            } else if end_data.ctxt.is_root() {
                 return self;
             }
             // Both spans fall within a macro.
@@ -890,7 +890,7 @@ impl Span {
         Span::new(
             span_data.lo,
             end_data.lo,
-            if end_data.ctxt == SyntaxContext::root() { end_data.ctxt } else { span_data.ctxt },
+            if end_data.ctxt.is_root() { end_data.ctxt } else { span_data.ctxt },
             if span_data.parent == end_data.parent { span_data.parent } else { None },
         )
     }
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index c5ce2575fff..19d986a3152 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -1156,6 +1156,7 @@ symbols! {
         ptr_null_mut,
         ptr_offset_from,
         ptr_offset_from_unsigned,
+        ptr_unique,
         pub_macro_rules,
         pub_restricted,
         public,