Expose size_hint() for TokenStream's iterator

dtolnay · dtolnay · commit 63e74aba813d · 2022-07-24T20:36:22.000-07:00
diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
@@ -382,6 +382,14 @@ pub mod token_stream {
                 bridge::TokenTree::Literal(tt) => TokenTree::Literal(Literal(tt)),
             })
         }
+
+        fn size_hint(&self) -> (usize, Option<usize>) {
+            self.0.size_hint()
+        }
+
+        fn count(self) -> usize {
+            self.0.count()
+        }
     }
 
     #[stable(feature = "proc_macro_lib2", since = "1.29.0")]

Original file line number	Diff line number	Diff line change
`@@ -382,6 +382,14 @@ pub mod token_stream {`
`382`	`382`	`bridge::TokenTree::Literal(tt) => TokenTree::Literal(Literal(tt)),`
`383`	`383`	`})`
`384`	`384`	`}`
	`385`	`+`
	`386`	`+ fn size_hint(&self) -> (usize, Option<usize>) {`
	`387`	`+ self.0.size_hint()`
	`388`	`+ }`
	`389`	`+`
	`390`	`+ fn count(self) -> usize {`
	`391`	`+ self.0.count()`
	`392`	`+ }`
`385`	`393`	`}`
`386`	`394`
`387`	`395`	`#[stable(feature = "proc_macro_lib2", since = "1.29.0")]`