proc_macro: Specialize Punct::to_string

mystor · mystor · commit e0dce6ec8df2 · 2022-07-18T12:59:14.000-04:00
This was removed in a previous part, however it should be specialized for
to_string performance and consistency.
diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
@@ -1004,6 +1004,13 @@ impl Punct {
     }
 }
 
+#[stable(feature = "proc_macro_lib2", since = "1.29.0")]
+impl ToString for Punct {
+    fn to_string(&self) -> String {
+        self.as_char().to_string()
+    }
+}
+
 /// Prints the punctuation character as a string that should be losslessly convertible
 /// back into the same character.
 #[stable(feature = "proc_macro_lib2", since = "1.29.0")]

Original file line number	Diff line number	Diff line change
`@@ -1004,6 +1004,13 @@ impl Punct {`
`1004`	`1004`	`}`
`1005`	`1005`	`}`
`1006`	`1006`
	`1007`	`+#[stable(feature = "proc_macro_lib2", since = "1.29.0")]`
	`1008`	`+impl ToString for Punct {`
	`1009`	`+ fn to_string(&self) -> String {`
	`1010`	`+ self.as_char().to_string()`
	`1011`	`+ }`
	`1012`	`+}`
	`1013`	`+`
`1007`	`1014`	`/// Prints the punctuation character as a string that should be losslessly convertible`
`1008`	`1015`	`/// back into the same character.`
`1009`	`1016`	`#[stable(feature = "proc_macro_lib2", since = "1.29.0")]`