syntax: add a custom owned smart pointer in ptr::P.

src/libsyntax/ast.rs

@@ -25,16 +25,6 @@ use std::rc::Rc;
 use std::gc::{Gc, GC};
 use serialize::{Encodable, Decodable, Encoder, Decoder};
 
-/// A pointer abstraction.
-// FIXME(eddyb) #10676 use Rc<T> in the future.
-pub type P<T> = Gc<T>;
-
-#[allow(non_snake_case)]
-/// Construct a P<T> from a T value.
-pub fn P<T: 'static>(value: T) -> P<T> {
-    box(GC) value
-}
-
 // FIXME #6993: in librustc, uses of "ident" should be replaced
 // by just "Name".