rollup merge of #24487: erickt/syntax

This removes the usage of `#[feature(into_cow, slice_patterns, box_syntax, box_patterns, quote, unsafe_destructor)]` from being used in libsyntax. My main desire for this is that it brings me one step closer to letting [syntex](https://github.com/erickt/rust-syntex) compile with stable rust. Hopefully this doesn't inconvenience rust development.

1 files changed, 1 insertions, 6 deletions

diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 3f36d0e8eda..d8beeb6a550 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -25,19 +25,13 @@
        html_favicon_url = "http://www.rust-lang.org/favicon.ico",
        html_root_url = "http://doc.rust-lang.org/nightly/")]
 
-#![feature(box_patterns)]
-#![feature(box_syntax)]
 #![feature(collections)]
 #![feature(core)]
 #![feature(libc)]
-#![feature(quote, unsafe_destructor)]
 #![feature(rustc_private)]
 #![feature(staged_api)]
 #![feature(unicode)]
-#![feature(path_ext)]
 #![feature(str_char)]
-#![feature(into_cow)]
-#![feature(slice_patterns)]
 
 extern crate arena;
 extern crate fmt_macros;
@@ -98,6 +92,7 @@ pub mod parse;
 pub mod ptr;
 pub mod show_span;
 pub mod std_inject;
+pub mod str;
 pub mod test;
 pub mod visit;