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-rw-r--r--compiler/rustc_span/src/lib.rs61
-rw-r--r--compiler/rustc_span/src/source_map.rs2
-rw-r--r--compiler/rustc_span/src/span_encoding.rs14
3 files changed, 55 insertions, 22 deletions
diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
index 5f41b112012..d744ad4014a 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -41,7 +41,7 @@ use hygiene::Transparency;
 pub use hygiene::{DesugaringKind, ExpnKind, ForLoopLoc, MacroKind};
 pub use hygiene::{ExpnData, ExpnHash, ExpnId, LocalExpnId, SyntaxContext};
 pub mod def_id;
-use def_id::{CrateNum, DefId, DefPathHash, LOCAL_CRATE};
+use def_id::{CrateNum, DefId, DefPathHash, LocalDefId, LOCAL_CRATE};
 pub mod lev_distance;
 mod span_encoding;
 pub use span_encoding::{Span, DUMMY_SP};
@@ -434,24 +434,38 @@ pub struct SpanData {
     /// Information about where the macro came from, if this piece of
     /// code was created by a macro expansion.
     pub ctxt: SyntaxContext,
+    pub parent: Option<LocalDefId>,
 }
 
 impl SpanData {
     #[inline]
     pub fn span(&self) -> Span {
-        Span::new(self.lo, self.hi, self.ctxt)
+        Span::new(self.lo, self.hi, self.ctxt, self.parent)
     }
     #[inline]
     pub fn with_lo(&self, lo: BytePos) -> Span {
-        Span::new(lo, self.hi, self.ctxt)
+        Span::new(lo, self.hi, self.ctxt, self.parent)
     }
     #[inline]
     pub fn with_hi(&self, hi: BytePos) -> Span {
-        Span::new(self.lo, hi, self.ctxt)
+        Span::new(self.lo, hi, self.ctxt, self.parent)
     }
     #[inline]
     pub fn with_ctxt(&self, ctxt: SyntaxContext) -> Span {
-        Span::new(self.lo, self.hi, ctxt)
+        Span::new(self.lo, self.hi, ctxt, self.parent)
+    }
+    #[inline]
+    pub fn with_parent(&self, parent: Option<LocalDefId>) -> Span {
+        Span::new(self.lo, self.hi, self.ctxt, parent)
+    }
+    /// Returns `true` if this is a dummy span with any hygienic context.
+    #[inline]
+    pub fn is_dummy(self) -> bool {
+        self.lo.0 == 0 && self.hi.0 == 0
+    }
+    /// Returns `true` if `self` fully encloses `other`.
+    pub fn contains(self, other: Self) -> bool {
+        self.lo <= other.lo && other.hi <= self.hi
     }
 }
 
@@ -513,12 +527,19 @@ impl Span {
     pub fn with_ctxt(self, ctxt: SyntaxContext) -> Span {
         self.data().with_ctxt(ctxt)
     }
+    #[inline]
+    pub fn parent(self) -> Option<LocalDefId> {
+        self.data().parent
+    }
+    #[inline]
+    pub fn with_parent(self, ctxt: Option<LocalDefId>) -> Span {
+        self.data().with_parent(ctxt)
+    }
 
     /// Returns `true` if this is a dummy span with any hygienic context.
     #[inline]
     pub fn is_dummy(self) -> bool {
-        let span = self.data();
-        span.lo.0 == 0 && span.hi.0 == 0
+        self.data().is_dummy()
     }
 
     /// Returns `true` if this span comes from a macro or desugaring.
@@ -534,7 +555,7 @@ impl Span {
 
     #[inline]
     pub fn with_root_ctxt(lo: BytePos, hi: BytePos) -> Span {
-        Span::new(lo, hi, SyntaxContext::root())
+        Span::new(lo, hi, SyntaxContext::root(), None)
     }
 
     /// Returns a new span representing an empty span at the beginning of this span.
@@ -566,7 +587,7 @@ impl Span {
     pub fn contains(self, other: Span) -> bool {
         let span = self.data();
         let other = other.data();
-        span.lo <= other.lo && other.hi <= span.hi
+        span.contains(other)
     }
 
     /// Returns `true` if `self` touches `other`.
@@ -602,7 +623,7 @@ impl Span {
 
     /// The `Span` for the tokens in the previous macro expansion from which `self` was generated,
     /// if any.
-    pub fn parent(self) -> Option<Span> {
+    pub fn parent_callsite(self) -> Option<Span> {
         let expn_data = self.ctxt().outer_expn_data();
         if !expn_data.is_root() { Some(expn_data.call_site) } else { None }
     }
@@ -610,7 +631,7 @@ impl Span {
     /// Walk down the expansion ancestors to find a span that's contained within `outer`.
     pub fn find_ancestor_inside(mut self, outer: Span) -> Option<Span> {
         while !outer.contains(self) {
-            self = self.parent()?;
+            self = self.parent_callsite()?;
         }
         Some(self)
     }
@@ -731,6 +752,7 @@ impl Span {
             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.parent == end_data.parent { span_data.parent } else { None },
         )
     }
 
@@ -748,6 +770,7 @@ impl Span {
             span.hi,
             end.lo,
             if end.ctxt == SyntaxContext::root() { end.ctxt } else { span.ctxt },
+            if span.parent == end.parent { span.parent } else { None },
         )
     }
 
@@ -765,6 +788,7 @@ impl Span {
             span.lo,
             end.lo,
             if end.ctxt == SyntaxContext::root() { end.ctxt } else { span.ctxt },
+            if span.parent == end.parent { span.parent } else { None },
         )
     }
 
@@ -774,6 +798,7 @@ impl Span {
             span.lo + BytePos::from_usize(inner.start),
             span.lo + BytePos::from_usize(inner.end),
             span.ctxt,
+            span.parent,
         )
     }
 
@@ -812,7 +837,7 @@ impl Span {
     pub fn remove_mark(&mut self) -> ExpnId {
         let mut span = self.data();
         let mark = span.ctxt.remove_mark();
-        *self = Span::new(span.lo, span.hi, span.ctxt);
+        *self = Span::new(span.lo, span.hi, span.ctxt, span.parent);
         mark
     }
 
@@ -820,7 +845,7 @@ impl Span {
     pub fn adjust(&mut self, expn_id: ExpnId) -> Option<ExpnId> {
         let mut span = self.data();
         let mark = span.ctxt.adjust(expn_id);
-        *self = Span::new(span.lo, span.hi, span.ctxt);
+        *self = Span::new(span.lo, span.hi, span.ctxt, span.parent);
         mark
     }
 
@@ -828,7 +853,7 @@ impl Span {
     pub fn normalize_to_macros_2_0_and_adjust(&mut self, expn_id: ExpnId) -> Option<ExpnId> {
         let mut span = self.data();
         let mark = span.ctxt.normalize_to_macros_2_0_and_adjust(expn_id);
-        *self = Span::new(span.lo, span.hi, span.ctxt);
+        *self = Span::new(span.lo, span.hi, span.ctxt, span.parent);
         mark
     }
 
@@ -836,7 +861,7 @@ impl Span {
     pub fn glob_adjust(&mut self, expn_id: ExpnId, glob_span: Span) -> Option<Option<ExpnId>> {
         let mut span = self.data();
         let mark = span.ctxt.glob_adjust(expn_id, glob_span);
-        *self = Span::new(span.lo, span.hi, span.ctxt);
+        *self = Span::new(span.lo, span.hi, span.ctxt, span.parent);
         mark
     }
 
@@ -848,7 +873,7 @@ impl Span {
     ) -> Option<Option<ExpnId>> {
         let mut span = self.data();
         let mark = span.ctxt.reverse_glob_adjust(expn_id, glob_span);
-        *self = Span::new(span.lo, span.hi, span.ctxt);
+        *self = Span::new(span.lo, span.hi, span.ctxt, span.parent);
         mark
     }
 
@@ -900,7 +925,7 @@ impl<D: Decoder> Decodable<D> for Span {
             let lo = d.read_struct_field("lo", Decodable::decode)?;
             let hi = d.read_struct_field("hi", Decodable::decode)?;
 
-            Ok(Span::new(lo, hi, SyntaxContext::root()))
+            Ok(Span::new(lo, hi, SyntaxContext::root(), None))
         })
     }
 }
@@ -961,7 +986,7 @@ impl fmt::Debug for Span {
 
 impl fmt::Debug for SpanData {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        (*SPAN_DEBUG)(Span::new(self.lo, self.hi, self.ctxt), f)
+        (*SPAN_DEBUG)(Span::new(self.lo, self.hi, self.ctxt, self.parent), f)
     }
 }
 
diff --git a/compiler/rustc_span/src/source_map.rs b/compiler/rustc_span/src/source_map.rs
index 9b8c8594ee8..9e403eb3f67 100644
--- a/compiler/rustc_span/src/source_map.rs
+++ b/compiler/rustc_span/src/source_map.rs
@@ -794,7 +794,7 @@ impl SourceMap {
             start_of_next_point.checked_add(width - 1).unwrap_or(start_of_next_point);
 
         let end_of_next_point = BytePos(cmp::max(sp.lo().0 + 1, end_of_next_point));
-        Span::new(BytePos(start_of_next_point), end_of_next_point, sp.ctxt())
+        Span::new(BytePos(start_of_next_point), end_of_next_point, sp.ctxt(), None)
     }
 
     /// Finds the width of the character, either before or after the end of provided span,
diff --git a/compiler/rustc_span/src/span_encoding.rs b/compiler/rustc_span/src/span_encoding.rs
index cb017709c6c..58d639082b0 100644
--- a/compiler/rustc_span/src/span_encoding.rs
+++ b/compiler/rustc_span/src/span_encoding.rs
@@ -4,6 +4,7 @@
 // The encoding format for inline spans were obtained by optimizing over crates in rustc/libstd.
 // See https://internals.rust-lang.org/t/rfc-compiler-refactoring-spans/1357/28
 
+use crate::def_id::LocalDefId;
 use crate::hygiene::SyntaxContext;
 use crate::{BytePos, SpanData};
 
@@ -70,19 +71,25 @@ pub const DUMMY_SP: Span = Span { base_or_index: 0, len_or_tag: 0, ctxt_or_zero:
 
 impl Span {
     #[inline]
-    pub fn new(mut lo: BytePos, mut hi: BytePos, ctxt: SyntaxContext) -> Self {
+    pub fn new(
+        mut lo: BytePos,
+        mut hi: BytePos,
+        ctxt: SyntaxContext,
+        parent: Option<LocalDefId>,
+    ) -> Self {
         if lo > hi {
             std::mem::swap(&mut lo, &mut hi);
         }
 
         let (base, len, ctxt2) = (lo.0, hi.0 - lo.0, ctxt.as_u32());
 
-        if len <= MAX_LEN && ctxt2 <= MAX_CTXT {
+        if len <= MAX_LEN && ctxt2 <= MAX_CTXT && parent.is_none() {
             // Inline format.
             Span { base_or_index: base, len_or_tag: len as u16, ctxt_or_zero: ctxt2 as u16 }
         } else {
             // Interned format.
-            let index = with_span_interner(|interner| interner.intern(&SpanData { lo, hi, ctxt }));
+            let index =
+                with_span_interner(|interner| interner.intern(&SpanData { lo, hi, ctxt, parent }));
             Span { base_or_index: index, len_or_tag: LEN_TAG, ctxt_or_zero: 0 }
         }
     }
@@ -96,6 +103,7 @@ impl Span {
                 lo: BytePos(self.base_or_index),
                 hi: BytePos(self.base_or_index + self.len_or_tag as u32),
                 ctxt: SyntaxContext::from_u32(self.ctxt_or_zero as u32),
+                parent: None,
             }
         } else {
             // Interned format.
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2025-11-03 01:25:04 +0000