proc_macro: don't panic parsing ..= (fix #47950)

durka · durka · commit 3cf73f40fb72 · 2018-02-06T14:43:01.000Z
diff --git a/src/libproc_macro/lib.rs b/src/libproc_macro/lib.rs
@@ -685,7 +685,7 @@ impl TokenTree {
                 })
             }
 
-            DotEq => unreachable!(),
+            DotEq => joint!('.', Eq),
             OpenDelim(..) | CloseDelim(..) => unreachable!(),
             Whitespace | Comment | Shebang(..) | Eof => unreachable!(),
         };

Original file line number	Diff line number	Diff line change
`@@ -685,7 +685,7 @@ impl TokenTree {`
`685`	`685`	`})`
`686`	`686`	`}`
`687`	`687`
`688`		`- DotEq => unreachable!(),`
	`688`	`+ DotEq => joint!('.', Eq),`
`689`	`689`	`OpenDelim(..) \| CloseDelim(..) => unreachable!(),`
`690`	`690`	`Whitespace \| Comment \| Shebang(..) \| Eof => unreachable!(),`
`691`	`691`	`};`