1 files changed, 20 insertions, 1 deletions
diff --git a/vendor/quote/src/spanned.rs b/vendor/quote/src/spanned.rs
index f64c8f5df..efc2e8bce 100644
--- a/vendor/quote/src/spanned.rs
+++ b/vendor/quote/src/spanned.rs
@@ -1,7 +1,9 @@
 use crate::ToTokens;
+use proc_macro2::extra::DelimSpan;
 use proc_macro2::{Span, TokenStream};
 
-pub trait Spanned {
+// Not public API other than via the syn crate. Use syn::spanned::Spanned.
+pub trait Spanned: private::Sealed {
     fn __span(&self) -> Span;
 }
 
@@ -11,6 +13,12 @@ impl Spanned for Span {
     }
 }
 
+impl Spanned for DelimSpan {
+    fn __span(&self) -> Span {
+        self.join()
+    }
+}
+
 impl<T: ?Sized + ToTokens> Spanned for T {
     fn __span(&self) -> Span {
         join_spans(self.into_token_stream())
@@ -41,3 +49,14 @@ fn join_spans(tokens: TokenStream) -> Span {
         .and_then(|last| first.join(last))
         .unwrap_or(first)
 }
+
+mod private {
+    use crate::ToTokens;
+    use proc_macro2::extra::DelimSpan;
+    use proc_macro2::Span;
+
+    pub trait Sealed {}
+    impl Sealed for Span {}
+    impl Sealed for DelimSpan {}
+    impl<T: ?Sized + ToTokens> Sealed for T {}
+}