libsyntax: Remove the old-style borrowed closure type syntax from the

language.

src/test/compile-fail/closure-bounds-cant-promote-superkind-in-struct.rs

@@ -9,10 +9,10 @@
 // except according to those terms.
 
 struct X {
-    field: &'static fn:Send(),
+    field: 'static ||:Send,
 }
 
-fn foo(blk: &'static fn:()) -> X {
+fn foo(blk: 'static ||:) -> X {
     return X { field: blk }; //~ ERROR expected bounds `Send` but found no bounds
 }
 

src/test/compile-fail/once-cant-call-twice-on-stack.rs

@@ -16,7 +16,7 @@ extern mod extra;
 use extra::arc;
 use std::util;
 
-fn foo(blk: &once fn()) {
+fn foo(blk: once ||) {
     blk();
     blk(); //~ ERROR use of moved value
 }

src/test/compile-fail/once-fn-subtyping.rs

@@ -10,8 +10,8 @@
 
 #[feature(once_fns)];
 fn main() {
-    let f: &once fn() = ||();
+    let f: once || = ||();
     let g: || = f;  //~ ERROR mismatched types
     let h: || = ||();
-    let i: &once fn() = h;  // ok
+    let i: once || = h;  // ok
 }

src/test/run-pass/once-move-out-on-stack.rs

@@ -17,7 +17,7 @@ extern mod extra;
 use extra::arc;
 use std::util;
 
-fn foo(blk: &once fn()) {
+fn foo(blk: once ||) {
     blk();
 }