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, 1 deletions

diff --git a/src/libstd/local_data.rs b/src/libstd/local_data.rs
index 9a029de8d6c..da738a387b2 100644
--- a/src/libstd/local_data.rs
+++ b/src/libstd/local_data.rs
@@ -357,7 +357,6 @@ mod tests {
     use super::*;
     use owned::Box;
     use task;
-    use str::StrSlice;
 
     #[test]
     fn test_tls_multitask() {