core: Inherit possible string functionality

This moves as much allocation as possible from teh std::str module into
core::str. This includes essentially all non-allocating functionality, mostly
iterators and slicing and such.

This primarily splits the Str trait into only having the as_slice() method,
adding a new StrAllocating trait to std::str which contains the relevant new
allocation methods. This is a breaking change if any of the methods of "trait
Str" were overriden. The old functionality can be restored by implementing both
the Str and StrAllocating traits.

[breaking-change]

1 files changed, 0 insertions, 5 deletions

diff --git a/src/libsyntax/util/interner.rs b/src/libsyntax/util/interner.rs
index b7932da8738..d705da7b72b 100644
--- a/src/libsyntax/util/interner.rs
+++ b/src/libsyntax/util/interner.rs
@@ -109,11 +109,6 @@ impl Str for RcStr {
         let s: &'a str = *self.string;
         s
     }
-
-    #[inline]
-    fn into_owned(self) -> ~str {
-        self.string.to_owned()
-    }
 }
 
 impl fmt::Show for RcStr {