Move absolute path of bound into InferredBound

dtolnay · Nov 29, 2022 · 6c13d6f · 6c13d6f
1 parent cfa9c10
commit 6c13d6f
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Showing 2 changed files with 7 additions and 5 deletions.
diff --git a/src/bound.rs b/src/bound.rs
@@ -1,4 +1,5 @@
-use proc_macro2::{Ident, Span};
+use proc_macro2::{Ident, Span, TokenStream};
+use quote::quote_spanned;
 use syn::punctuated::Punctuated;
 use syn::{Token, TypeParamBound};
 
@@ -34,8 +35,9 @@ impl InferredBound {
         }
     }
 
-    pub fn spanned_ident(&self, span: Span) -> Ident {
-        Ident::new(self.as_str(), span)
+    pub fn spanned_path(&self, span: Span) -> TokenStream {
+        let ident = Ident::new(self.as_str(), span);
+        quote_spanned!(span=> ::core::marker::#ident)
     }
 }
 

diff --git a/src/expand.rs b/src/expand.rs
@@ -257,8 +257,8 @@ fn transform_sig(
         where_clause.predicates.push(if assume_bound || is_local {
             parse_quote_spanned!(default_span=> Self: 'async_trait)
         } else {
-            let bound = bound.spanned_ident(default_span);
-            parse_quote_spanned!(default_span=> Self: ::core::marker::#bound + 'async_trait)
+            let bound = bound.spanned_path(default_span);
+            parse_quote_spanned!(default_span=> Self: #bound + 'async_trait)
         });
     }