Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 61 insertions, 28 deletions

diff --git a/compiler/rustc_span/Cargo.toml b/compiler/rustc_span/Cargo.toml
index a7c7575f3..ee93f74e7 100644
--- a/compiler/rustc_span/Cargo.toml
+++ b/compiler/rustc_span/Cargo.toml
@@ -18,4 +18,4 @@ tracing = "0.1"
 sha1 = "0.10.0"
 sha2 = "0.10.1"
 md5 = { package = "md-5", version = "0.10.0" }
-indexmap = { version = "1.9.3" }
+indexmap = { version = "2.0.0" }
diff --git a/compiler/rustc_span/src/hygiene.rs b/compiler/rustc_span/src/hygiene.rs
index b219fde4d..9f2ff4378 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)
     }
 
@@ -1288,7 +1293,7 @@ pub fn decode_expn_id(
     decode_data: impl FnOnce(ExpnId) -> (ExpnData, ExpnHash),
 ) -> ExpnId {
     if index == 0 {
-        debug!("decode_expn_id: deserialized root");
+        trace!("decode_expn_id: deserialized root");
         return ExpnId::root();
     }
 
@@ -1321,7 +1326,7 @@ pub fn decode_syntax_context<D: Decoder, F: FnOnce(&mut D, u32) -> SyntaxContext
 ) -> SyntaxContext {
     let raw_id: u32 = Decodable::decode(d);
     if raw_id == 0 {
-        debug!("decode_syntax_context: deserialized root");
+        trace!("decode_syntax_context: deserialized root");
         // The root is special
         return SyntaxContext::root();
     }
@@ -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 eae3f0fa0..3bb9c4920 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -65,11 +65,11 @@ use rustc_data_structures::sync::{Lock, Lrc};
 
 use std::borrow::Cow;
 use std::cmp::{self, Ordering};
-use std::fmt;
 use std::hash::Hash;
 use std::ops::{Add, Range, Sub};
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
+use std::{fmt, iter};
 
 use md5::Digest;
 use md5::Md5;
@@ -733,12 +733,15 @@ impl Span {
     /// else returns the `ExpnData` for the macro definition
     /// corresponding to the source callsite.
     pub fn source_callee(self) -> Option<ExpnData> {
-        fn source_callee(expn_data: ExpnData) -> ExpnData {
-            let next_expn_data = expn_data.call_site.ctxt().outer_expn_data();
-            if !next_expn_data.is_root() { source_callee(next_expn_data) } else { expn_data }
-        }
         let expn_data = self.ctxt().outer_expn_data();
-        if !expn_data.is_root() { Some(source_callee(expn_data)) } else { None }
+
+        // Create an iterator of call site expansions
+        iter::successors(Some(expn_data), |expn_data| {
+            Some(expn_data.call_site.ctxt().outer_expn_data())
+        })
+        // Find the last expansion which is not root
+        .take_while(|expn_data| !expn_data.is_root())
+        .last()
     }
 
     /// Checks if a span is "internal" to a macro in which `#[unstable]`
@@ -777,7 +780,7 @@ impl Span {
 
     pub fn macro_backtrace(mut self) -> impl Iterator<Item = ExpnData> {
         let mut prev_span = DUMMY_SP;
-        std::iter::from_fn(move || {
+        iter::from_fn(move || {
             loop {
                 let expn_data = self.ctxt().outer_expn_data();
                 if expn_data.is_root() {
@@ -826,9 +829,9 @@ 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 +840,7 @@ 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 +858,7 @@ 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 +882,9 @@ 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 +893,7 @@ 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/source_map.rs b/compiler/rustc_span/src/source_map.rs
index 1824510a9..86716da17 100644
--- a/compiler/rustc_span/src/source_map.rs
+++ b/compiler/rustc_span/src/source_map.rs
@@ -744,6 +744,21 @@ impl SourceMap {
         })
     }
 
+    /// Extends the given `Span` to previous character while the previous character matches the predicate
+    pub fn span_extend_prev_while(
+        &self,
+        span: Span,
+        f: impl Fn(char) -> bool,
+    ) -> Result<Span, SpanSnippetError> {
+        self.span_to_source(span, |s, start, _end| {
+            let n = s[..start]
+                .char_indices()
+                .rfind(|&(_, c)| !f(c))
+                .map_or(start, |(i, _)| start - i - 1);
+            Ok(span.with_lo(span.lo() - BytePos(n as u32)))
+        })
+    }
+
     /// Extends the given `Span` to just before the next occurrence of `c`.
     pub fn span_extend_to_next_char(&self, sp: Span, c: char, accept_newlines: bool) -> Span {
         if let Ok(next_source) = self.span_to_next_source(sp) {
@@ -1057,11 +1072,7 @@ impl SourceMap {
     /// This index is guaranteed to be valid for the lifetime of this `SourceMap`,
     /// since `source_files` is a `MonotonicVec`
     pub fn lookup_source_file_idx(&self, pos: BytePos) -> usize {
-        self.files
-            .borrow()
-            .source_files
-            .binary_search_by_key(&pos, |key| key.start_pos)
-            .unwrap_or_else(|p| p - 1)
+        self.files.borrow().source_files.partition_point(|x| x.start_pos <= pos) - 1
     }
 
     pub fn count_lines(&self) -> usize {
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 874d578fe..5c6d43e50 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -432,7 +432,6 @@ symbols! {
         bool,
         borrowck_graphviz_format,
         borrowck_graphviz_postflow,
-        box_free,
         box_new,
         box_patterns,
         box_syntax,
@@ -657,6 +656,7 @@ symbols! {
         dyn_trait,
         e,
         edition_panic,
+        effects,
         eh_catch_typeinfo,
         eh_personality,
         emit,
@@ -687,6 +687,7 @@ symbols! {
         expf32,
         expf64,
         explicit_generic_args_with_impl_trait,
+        explicit_tail_calls,
         export_name,
         expr,
         extended_key_value_attributes,
@@ -701,7 +702,9 @@ symbols! {
         f,
         f16c_target_feature,
         f32,
+        f32_nan,
         f64,
+        f64_nan,
         fabsf32,
         fabsf64,
         fadd_fast,
@@ -756,7 +759,6 @@ symbols! {
         from_desugaring,
         from_fn,
         from_iter,
-        from_method,
         from_output,
         from_residual,
         from_size_align_unchecked,
@@ -791,6 +793,7 @@ symbols! {
         hexagon_target_feature,
         hidden,
         homogeneous_aggregate,
+        host,
         html_favicon_url,
         html_logo_url,
         html_no_source,
@@ -815,6 +818,7 @@ symbols! {
         impl_trait_in_bindings,
         impl_trait_in_fn_trait_return,
         impl_trait_projections,
+        implement_via_object,
         implied_by,
         import,
         import_name_type,
@@ -868,6 +872,7 @@ symbols! {
         large_assignments,
         lateout,
         lazy_normalization_consts,
+        lazy_type_alias,
         le,
         len,
         let_chains,
@@ -1146,12 +1151,15 @@ symbols! {
         profiler_builtins,
         profiler_runtime,
         ptr,
+        ptr_cast_mut,
+        ptr_from_ref,
         ptr_guaranteed_cmp,
         ptr_mask,
         ptr_null,
         ptr_null_mut,
         ptr_offset_from,
         ptr_offset_from_unsigned,
+        ptr_unique,
         pub_macro_rules,
         pub_restricted,
         public,
@@ -1277,6 +1285,7 @@ symbols! {
         rustc_evaluate_where_clauses,
         rustc_expected_cgu_reuse,
         rustc_has_incoherent_inherent_impls,
+        rustc_host,
         rustc_if_this_changed,
         rustc_inherit_overflow_checks,
         rustc_insignificant_dtor,
@@ -1454,6 +1463,10 @@ symbols! {
         stop_after_dataflow,
         store,
         str,
+        str_from_utf8,
+        str_from_utf8_mut,
+        str_from_utf8_unchecked,
+        str_from_utf8_unchecked_mut,
         str_split_whitespace,
         str_trim,
         str_trim_end,
@@ -1547,6 +1560,7 @@ symbols! {
         type_length_limit,
         type_macros,
         type_name,
+        type_privacy_lints,
         u128,
         u16,
         u32,