Step one towards new type param kind syntax

Issue #1067

Needs a snapshot to finalize.

Author: marijnh

src/comp/syntax/parse/parser.rs

@@ -1739,7 +1739,11 @@ fn parse_ty_param(p: parser) -> ast::ty_param {
         alt p.peek() {
           token::TILDE. { p.bump(); ast::kind_unique }
           token::AT. { p.bump(); ast::kind_shared }
-          _ { ast::kind_pinned }
+          _ {
+            if eat_word(p, "pinned") { ast::kind_pinned }
+            else if eat_word(p, "unique") { ast::kind_unique }
+            else { ast::kind_shared }
+          }
         };
     ret {ident: parse_ident(p), kind: k};
 }

src/comp/syntax/print/pprust.rs

@@ -1193,8 +1193,8 @@ fn print_arg_mode(s: ps, m: ast::mode) {
 
 fn print_kind(s: ps, kind: ast::kind) {
     alt kind {
-      ast::kind_unique. { word(s.s, "~"); }
-      ast::kind_shared. { word(s.s, "@"); }
+      ast::kind_unique. { word_nbsp(s, "unique"); }
+      ast::kind_pinned. { word_nbsp(s, "pinned"); }
       _ {/* fallthrough */ }
     }
 }

src/test/compile-fail/implicit-copy-2.rs

@@ -4,7 +4,7 @@ resource r(i: @mutable int) {
     *i = *i + 1;
 }
 
-fn movearg<T>(i: T) {
+fn movearg<pinned T>(i: T) {
     // Implicit copy to mutate reference i
     let j <- i;
 }

src/test/run-pass/resource-in-struct.rs

@@ -5,7 +5,7 @@ type closable = @mutable bool;
 
 resource close_res(i: closable) { *i = false; }
 
-tag option<T> { none; some(T); }
+tag option<pinned T> { none; some(T); }
 
 fn sink(res: option<close_res>) { }