Move definition of Edition from libsyntax to libsyntax_pos

Author: petrochenkov

src/libsyntax/lib.rs

@@ -22,7 +22,6 @@
 #![feature(unicode_internals)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(slice_sort_by_cached_key)]
-#![feature(non_exhaustive)]
 #![feature(const_atomic_usize_new)]
 #![feature(rustc_attrs)]
 #![feature(str_escape)]
@@ -142,14 +141,14 @@ pub mod codemap;
 #[macro_use]
 pub mod config;
 pub mod entry;
-pub mod edition;
 pub mod feature_gate;
 pub mod fold;
 pub mod parse;
 pub mod ptr;
 pub mod show_span;
 pub mod std_inject;
 pub mod str;
+pub use syntax_pos::edition;
 pub use syntax_pos::symbol;
 pub mod test;
 pub mod tokenstream;

src/libsyntax/edition.rs renamed to src/libsyntax_pos/edition.rs

@@ -20,6 +20,7 @@
 
 #![feature(const_fn)]
 #![feature(custom_attribute)]
+#![feature(non_exhaustive)]
 #![feature(optin_builtin_traits)]
 #![allow(unused_attributes)]
 #![feature(specialization)]
@@ -48,6 +49,7 @@ extern crate serialize as rustc_serialize; // used by deriving
 
 extern crate unicode_width;
 
+pub mod edition;
 pub mod hygiene;
 pub use hygiene::{Mark, SyntaxContext, ExpnInfo, ExpnFormat, NameAndSpan, CompilerDesugaringKind};