libcore: Add an implementation of to_str for &str.

pcwalton · pcwalton · commit 7d8642941545 · 2012-08-25T18:43:38.000-07:00
It duplicates the string.
diff --git a/src/libcore/to_str.rs b/src/libcore/to_str.rs
@@ -46,6 +46,9 @@ impl (): ToStr {
 impl ~str: ToStr {
     fn to_str() -> ~str { self }
 }
+impl &str: ToStr {
+    fn to_str() -> ~str { str::from_slice(self) }
+}
 
 impl<A: ToStr copy, B: ToStr copy> (A, B): ToStr {
     fn to_str() -> ~str {

Original file line number	Diff line number	Diff line change
`@@ -46,6 +46,9 @@ impl (): ToStr {`
`46`	`46`	`impl ~str: ToStr {`
`47`	`47`	`fn to_str() -> ~str { self }`
`48`	`48`	`}`
	`49`	`+impl &str: ToStr {`
	`50`	`+ fn to_str() -> ~str { str::from_slice(self) }`
	`51`	`+}`
`49`	`52`
`50`	`53`	`impl<A: ToStr copy, B: ToStr copy> (A, B): ToStr {`
`51`	`54`	`fn to_str() -> ~str {`