Support prefix notation for vstore strings. Closes #2906.

46 files changed, 252 insertions, 237 deletions

diff --git a/src/cargo/cargo.rs b/src/cargo/cargo.rs
index e69945c97b9..6271c35f494 100644
--- a/src/cargo/cargo.rs
+++ b/src/cargo/cargo.rs
@@ -283,7 +283,7 @@ fn load_crate(filename: str) -> option<crate> {
             ast::view_item_use(ident, metas, id) {
                 let name_items = attr::find_meta_items_by_name(metas, "name");
                 let m = if name_items.is_empty() {
-                    metas + ~[attr::mk_name_value_item_str(@"name", *ident)]
+                    metas + ~[attr::mk_name_value_item_str(@"name"/~, *ident)]
                 } else {
                     metas
                 };
diff --git a/src/fuzzer/fuzzer.rs b/src/fuzzer/fuzzer.rs
index 00a9ceeabd7..8816b58d9e6 100644
--- a/src/fuzzer/fuzzer.rs
+++ b/src/fuzzer/fuzzer.rs
@@ -45,7 +45,7 @@ fn common_exprs() -> ~[ast::expr] {
      dse(ast::expr_again),
      dse(ast::expr_fail(option::none)),
      dse(ast::expr_fail(option::some(
-         @dse(ast::expr_lit(@dsl(ast::lit_str(@"boo"))))))),
+         @dse(ast::expr_lit(@dsl(ast::lit_str(@"boo"/~))))))),
      dse(ast::expr_ret(option::none)),
      dse(ast::expr_lit(@dsl(ast::lit_nil))),
      dse(ast::expr_lit(@dsl(ast::lit_bool(false)))),
diff --git a/src/libcore/task.rs b/src/libcore/task.rs
index 02a29c28966..597a49305e6 100644
--- a/src/libcore/task.rs
+++ b/src/libcore/task.rs
@@ -1301,10 +1301,10 @@ fn test_unkillable_nested() {
 #[test]
 fn test_tls_multitask() unsafe {
     fn my_key(+_x: @str/~) { }
-    local_data_set(my_key, @"parent data");
+    local_data_set(my_key, @"parent data"/~);
     do task::spawn {
         assert local_data_get(my_key) == none; // TLS shouldn't carry over.
-        local_data_set(my_key, @"child data");
+        local_data_set(my_key, @"child data"/~);
         assert *(local_data_get(my_key).get()) == "child data";
         // should be cleaned up for us
     }
@@ -1317,15 +1317,15 @@ fn test_tls_multitask() unsafe {
 #[test]
 fn test_tls_overwrite() unsafe {
     fn my_key(+_x: @str/~) { }
-    local_data_set(my_key, @"first data");
-    local_data_set(my_key, @"next data"); // Shouldn't leak.
+    local_data_set(my_key, @"first data"/~);
+    local_data_set(my_key, @"next data"/~); // Shouldn't leak.
     assert *(local_data_get(my_key).get()) == "next data";
 }
 
 #[test]
 fn test_tls_pop() unsafe {
     fn my_key(+_x: @str/~) { }
-    local_data_set(my_key, @"weasel");
+    local_data_set(my_key, @"weasel"/~);
     assert *(local_data_pop(my_key).get()) == "weasel";
     // Pop must remove the data from the map.
     assert local_data_pop(my_key) == none;
@@ -1337,12 +1337,12 @@ fn test_tls_modify() unsafe {
     local_data_modify(my_key, |data| {
         alt data {
             some(@val) { fail "unwelcome value: " + val }
-            none       { some(@"first data") }
+            none       { some(@"first data"/~) }
         }
     });
     local_data_modify(my_key, |data| {
         alt data {
-            some(@"first data") { some(@"next data") }
+            some(@"first data"/~) { some(@"next data"/~) }
             some(@val)          { fail "wrong value: " + val }
             none                { fail "missing value" }
         }
@@ -1359,7 +1359,7 @@ fn test_tls_crust_automorestack_memorial_bug() unsafe {
     // for logging, think vsnprintf) would run on a stack smaller than 1 MB.
     fn my_key(+_x: @str/~) { }
     do task::spawn {
-        unsafe { local_data_set(my_key, @"hax"); }
+        unsafe { local_data_set(my_key, @"hax"/~); }
     }
 }
 
@@ -1369,7 +1369,7 @@ fn test_tls_multiple_types() unsafe {
     fn box_key(+_x: @@()) { }
     fn int_key(+_x: @int) { }
     do task::spawn {
-        local_data_set(str_key, @"string data");
+        local_data_set(str_key, @"string data"/~);
         local_data_set(box_key, @@());
         local_data_set(int_key, @42);
     }
@@ -1381,7 +1381,7 @@ fn test_tls_overwrite_multiple_types() unsafe {
     fn box_key(+_x: @@()) { }
     fn int_key(+_x: @int) { }
     do task::spawn {
-        local_data_set(str_key, @"string data");
+        local_data_set(str_key, @"string data"/~);
         local_data_set(int_key, @42);
         // This could cause a segfault if overwriting-destruction is done with
         // the crazy polymorphic transmute rather than the provided finaliser.
@@ -1396,10 +1396,10 @@ fn test_tls_cleanup_on_failure() unsafe {
     fn str_key(+_x: @str/~) { }
     fn box_key(+_x: @@()) { }
     fn int_key(+_x: @int) { }
-    local_data_set(str_key, @"parent data");
+    local_data_set(str_key, @"parent data"/~);
     local_data_set(box_key, @@());
     do task::spawn { // spawn_linked
-        local_data_set(str_key, @"string data");
+        local_data_set(str_key, @"string data"/~);
         local_data_set(box_key, @@());
         local_data_set(int_key, @42);
         fail;
diff --git a/src/libcore/unsafe.rs b/src/libcore/unsafe.rs
index 0a62e77c410..e148d979b34 100644
--- a/src/libcore/unsafe.rs
+++ b/src/libcore/unsafe.rs
@@ -58,7 +58,7 @@ mod tests {
     #[test]
     fn test_bump_box_refcount() {
         unsafe {
-            let box = @"box box box";       // refcount 1
+            let box = @"box box box"/~;       // refcount 1
             bump_box_refcount(box);         // refcount 2
             let ptr: *int = transmute(box); // refcount 2
             let _box1: @str/~ = reinterpret_cast(ptr);
diff --git a/src/libstd/json.rs b/src/libstd/json.rs
index 917cae32e2d..eab42a52b59 100644
--- a/src/libstd/json.rs
+++ b/src/libstd/json.rs
@@ -659,8 +659,8 @@ mod tests {
 
     #[test]
     fn test_write_str() {
-        assert to_str(string(@"")) == "\"\"";
-        assert to_str(string(@"foo")) == "\"foo\"";
+        assert to_str(string(@""/~)) == "\"\""/~;
+        assert to_str(string(@"foo"/~)) == "\"foo\""/~;
     }
 
     #[test]
@@ -676,7 +676,7 @@ mod tests {
         assert to_str(list(@~[
             boolean(false),
             null,
-            list(@~[string(@"foo\nbar"), num(3.5f)])
+            list(@~[string(@"foo\nbar"/~), num(3.5f)])
         ])) == "[false, null, [\"foo\\nbar\", 3.5]]";
     }
 
@@ -687,8 +687,8 @@ mod tests {
         assert to_str(mk_dict(~[
             ("a", boolean(true)),
             ("b", list(@~[
-                mk_dict(~[("c", string(@"\x0c\r"))]),
-                mk_dict(~[("d", string(@""))])
+                mk_dict(~[("c", string(@"\x0c\r"/~))]),
+                mk_dict(~[("d", string(@""/~))])
             ]))
         ])) ==
             "{ " +
@@ -703,35 +703,35 @@ mod tests {
     #[test]
     fn test_trailing_characters() {
         assert from_str("nulla") ==
-            err({line: 1u, col: 5u, msg: @"trailing characters"});
+            err({line: 1u, col: 5u, msg: @"trailing characters"/~});
         assert from_str("truea") ==
-            err({line: 1u, col: 5u, msg: @"trailing characters"});
+            err({line: 1u, col: 5u, msg: @"trailing characters"/~});
         assert from_str("falsea") ==
-            err({line: 1u, col: 6u, msg: @"trailing characters"});
+            err({line: 1u, col: 6u, msg: @"trailing characters"/~});
         assert from_str("1a") ==
-            err({line: 1u, col: 2u, msg: @"trailing characters"});
+            err({line: 1u, col: 2u, msg: @"trailing characters"/~});
         assert from_str("[]a") ==
-            err({line: 1u, col: 3u, msg: @"trailing characters"});
+            err({line: 1u, col: 3u, msg: @"trailing characters"/~});
         assert from_str("{}a") ==
-            err({line: 1u, col: 3u, msg: @"trailing characters"});
+            err({line: 1u, col: 3u, msg: @"trailing characters"/~});
     }
 
     #[test]
     fn test_read_identifiers() {
         assert from_str("n") ==
-            err({line: 1u, col: 2u, msg: @"invalid syntax"});
+            err({line: 1u, col: 2u, msg: @"invalid syntax"/~});
         assert from_str("nul") ==
-            err({line: 1u, col: 4u, msg: @"invalid syntax"});
+            err({line: 1u, col: 4u, msg: @"invalid syntax"/~});
 
         assert from_str("t") ==
-            err({line: 1u, col: 2u, msg: @"invalid syntax"});
+            err({line: 1u, col: 2u, msg: @"invalid syntax"/~});
         assert from_str("truz") ==
-            err({line: 1u, col: 4u, msg: @"invalid syntax"});
+            err({line: 1u, col: 4u, msg: @"invalid syntax"/~});
 
         assert from_str("f") ==
-            err({line: 1u, col: 2u, msg: @"invalid syntax"});
+            err({line: 1u, col: 2u, msg: @"invalid syntax"/~});
         assert from_str("faz") ==
-            err({line: 1u, col: 3u, msg: @"invalid syntax"});
+            err({line: 1u, col: 3u, msg: @"invalid syntax"/~});
 
         assert from_str("null") == ok(null);
         assert from_str("true") == ok(boolean(true));
@@ -744,20 +744,20 @@ mod tests {
     #[test]
     fn test_read_num() {
         assert from_str("+") ==
-            err({line: 1u, col: 1u, msg: @"invalid syntax"});
+            err({line: 1u, col: 1u, msg: @"invalid syntax"/~});
         assert from_str(".") ==
-            err({line: 1u, col: 1u, msg: @"invalid syntax"});
+            err({line: 1u, col: 1u, msg: @"invalid syntax"/~});
 
         assert from_str("-") ==
-            err({line: 1u, col: 2u, msg: @"invalid number"});
+            err({line: 1u, col: 2u, msg: @"invalid number"/~});
         assert from_str("00") ==
-            err({line: 1u, col: 2u, msg: @"invalid number"});
+            err({line: 1u, col: 2u, msg: @"invalid number"/~});
         assert from_str("1.") ==
-            err({line: 1u, col: 3u, msg: @"invalid number"});
+            err({line: 1u, col: 3u, msg: @"invalid number"/~});
         assert from_str("1e") ==
-            err({line: 1u, col: 3u, msg: @"invalid number"});
+            err({line: 1u, col: 3u, msg: @"invalid number"/~});
         assert from_str("1e+") ==
-            err({line: 1u, col: 4u, msg: @"invalid number"});
+            err({line: 1u, col: 4u, msg: @"invalid number"/~});
 
         assert from_str("3") == ok(num(3f));
         assert from_str("3.1") == ok(num(3.1f));
@@ -772,32 +772,32 @@ mod tests {
     #[test]
     fn test_read_str() {
         assert from_str("\"") ==
-            err({line: 1u, col: 2u, msg: @"EOF while parsing string"});
+            err({line: 1u, col: 2u, msg: @"EOF while parsing string"/~});
         assert from_str("\"lol") ==
-            err({line: 1u, col: 5u, msg: @"EOF while parsing string"});
+            err({line: 1u, col: 5u, msg: @"EOF while parsing string"/~});
 
-        assert from_str("\"\"") == ok(string(@""));
-        assert from_str("\"foo\"") == ok(string(@"foo"));
-        assert from_str("\"\\\"\"") == ok(string(@"\""));
-        assert from_str("\"\\b\"") == ok(string(@"\x08"));
-        assert from_str("\"\\n\"") == ok(string(@"\n"));
-        assert from_str("\"\\r\"") == ok(string(@"\r"));
-        assert from_str("\"\\t\"") == ok(string(@"\t"));
-        assert from_str(" \"foo\" ") == ok(string(@"foo"));
+        assert from_str("\"\"") == ok(string(@""/~));
+        assert from_str("\"foo\"") == ok(string(@"foo"/~));
+        assert from_str("\"\\\"\"") == ok(string(@"\""/~));
+        assert from_str("\"\\b\"") == ok(string(@"\x08"/~));
+        assert from_str("\"\\n\"") == ok(string(@"\n"/~));
+        assert from_str("\"\\r\"") == ok(string(@"\r"/~));
+        assert from_str("\"\\t\"") == ok(string(@"\t"/~));
+        assert from_str(" \"foo\" ") == ok(string(@"foo"/~));
     }
 
     #[test]
     fn test_read_list() {
         assert from_str("[") ==
-            err({line: 1u, col: 2u, msg: @"EOF while parsing value"});
+            err({line: 1u, col: 2u, msg: @"EOF while parsing value"/~});
         assert from_str("[1") ==
-            err({line: 1u, col: 3u, msg: @"EOF while parsing list"});
+            err({line: 1u, col: 3u, msg: @"EOF while parsing list"/~});
         assert from_str("[1,") ==
-            err({line: 1u, col: 4u, msg: @"EOF while parsing value"});
+            err({line: 1u, col: 4u, msg: @"EOF while parsing value"/~});
         assert from_str("[1,]") ==
-            err({line: 1u, col: 4u, msg: @"invalid syntax"});
+            err({line: 1u, col: 4u, msg: @"invalid syntax"/~});
         assert from_str("[6 7]") ==
-            err({line: 1u, col: 4u, msg: @"expected `,` or `]`"});
+            err({line: 1u, col: 4u, msg: @"expected `,` or `]`"/~});
 
         assert from_str("[]") == ok(list(@~[]));
         assert from_str("[ ]") == ok(list(@~[]));
@@ -813,28 +813,28 @@ mod tests {
     #[test]
     fn test_read_dict() {
         assert from_str("{") ==
-            err({line: 1u, col: 2u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 2u, msg: @"EOF while parsing object"/~});
         assert from_str("{ ") ==
-            err({line: 1u, col: 3u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 3u, msg: @"EOF while parsing object"/~});
         assert from_str("{1") ==
-            err({line: 1u, col: 2u, msg: @"key must be a string"});
+            err({line: 1u, col: 2u, msg: @"key must be a string"/~});
         assert from_str("{ \"a\"") ==
-            err({line: 1u, col: 6u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 6u, msg: @"EOF while parsing object"/~});
         assert from_str("{\"a\"") ==
-            err({line: 1u, col: 5u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 5u, msg: @"EOF while parsing object"/~});
         assert from_str("{\"a\" ") ==
-            err({line: 1u, col: 6u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 6u, msg: @"EOF while parsing object"/~});
 
         assert from_str("{\"a\" 1") ==
-            err({line: 1u, col: 6u, msg: @"expected `:`"});
+            err({line: 1u, col: 6u, msg: @"expected `:`"/~});
         assert from_str("{\"a\":") ==
-            err({line: 1u, col: 6u, msg: @"EOF while parsing value"});
+            err({line: 1u, col: 6u, msg: @"EOF while parsing value"/~});
         assert from_str("{\"a\":1") ==
-            err({line: 1u, col: 7u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 7u, msg: @"EOF while parsing object"/~});
         assert from_str("{\"a\":1 1") ==
-            err({line: 1u, col: 8u, msg: @"expected `,` or `}`"});
+            err({line: 1u, col: 8u, msg: @"expected `,` or `}`"/~});
         assert from_str("{\"a\":1,") ==
-            err({line: 1u, col: 8u, msg: @"EOF while parsing object"});
+            err({line: 1u, col: 8u, msg: @"EOF while parsing object"/~});
 
         assert eq(result::get(from_str("{}")), mk_dict(~[]));
         assert eq(result::get(from_str("{\"a\": 3}")),
@@ -866,7 +866,7 @@ mod tests {
                       ("a", num(1.0f)),
                       ("b", list(@~[
                           boolean(true),
-                          string(@"foo\nbar"),
+                          string(@"foo\nbar"/~),
                           mk_dict(~[
                               ("c", mk_dict(~[("d", null)]))
                           ])
@@ -877,6 +877,6 @@ mod tests {
     #[test]
     fn test_multiline_errors() {
         assert from_str("{\n  \"foo\":\n \"bar\"") ==
-            err({line: 3u, col: 8u, msg: @"EOF while parsing object"});
+            err({line: 3u, col: 8u, msg: @"EOF while parsing object"/~});
     }
 }
diff --git a/src/libstd/rope.rs b/src/libstd/rope.rs
index 91f63fe938c..917adfaaecd 100644
--- a/src/libstd/rope.rs
+++ b/src/libstd/rope.rs
@@ -1270,7 +1270,7 @@ mod tests {
 
     #[test]
     fn of_string1() {
-        let sample = @"0123456789ABCDE";
+        let sample = @"0123456789ABCDE"/~;
         let r      = of_str(sample);
 
         assert char_len(r) == str::char_len(*sample);
@@ -1330,8 +1330,8 @@ mod tests {
 
     #[test]
     fn bal1() {
-        let init = @ "1234567890";
-        let buf  = @ mut * init;
+        let init = @"1234567890"/~;
+        let buf  = @mut * init;
         let mut i = 0;
         while i < 8 { *buf = *buf + *buf; i+=1;}
         let sample = @*buf;
@@ -1352,7 +1352,7 @@ mod tests {
     #[ignore]
     fn char_at1() {
         //Generate a large rope
-        let mut r = of_str(@ "123456789");
+        let mut r = of_str(@"123456789"/~);
         for uint::range(0u, 10u) |_i| {
             r = append_rope(r, r);
         }
@@ -1384,7 +1384,7 @@ mod tests {
     #[test]
     fn concat1() {
         //Generate a reasonable rope
-        let chunk = of_str(@ "123456789");
+        let chunk = of_str(@"123456789"/~);
         let mut r = empty();
         for uint::range(0u, 10u) |_i| {
             r = append_rope(r, chunk);
diff --git a/src/libsyntax/ast_util.rs b/src/libsyntax/ast_util.rs
index 5675ecadf62..cfaa7103a58 100644
--- a/src/libsyntax/ast_util.rs
+++ b/src/libsyntax/ast_util.rs
@@ -381,7 +381,7 @@ fn dtor_dec() -> fn_decl {
     let nil_t = @{id: 0, node: ty_nil, span: dummy_sp()};
     // dtor has one argument, of type ()
     {inputs: ~[{mode: ast::expl(ast::by_ref),
-               ty: nil_t, ident: @"_", id: 0}],
+               ty: nil_t, ident: @"_"/~, id: 0}],
      output: nil_t, purity: impure_fn, cf: return_val, constraints: ~[]}
 }
 
diff --git a/src/libsyntax/attr.rs b/src/libsyntax/attr.rs
index aac0b1f4d76..114daa900aa 100644
--- a/src/libsyntax/attr.rs
+++ b/src/libsyntax/attr.rs
@@ -77,7 +77,7 @@ fn mk_sugared_doc_attr(text: str, lo: uint, hi: uint) -> ast::attribute {
     let lit = spanned(lo, hi, ast::lit_str(@text));
     let attr = {
         style: doc_comment_style(text),
-        value: spanned(lo, hi, ast::meta_name_value(@"doc", lit)),
+        value: spanned(lo, hi, ast::meta_name_value(@"doc"/~, lit)),
         is_sugared_doc: true
     };
     ret spanned(lo, hi, attr);
@@ -97,7 +97,7 @@ fn attr_metas(attrs: ~[ast::attribute]) -> ~[@ast::meta_item] {
 fn desugar_doc_attr(attr: ast::attribute) -> ast::attribute {
     if attr.node.is_sugared_doc {
         let comment = get_meta_item_value_str(@attr.node.value).get();
-        let meta = mk_name_value_item_str(@"doc",
+        let meta = mk_name_value_item_str(@"doc"/~,
                                      strip_doc_comment_decoration(*comment));
         ret mk_attr(meta);
     } else {
@@ -345,13 +345,13 @@ fn foreign_abi(attrs: ~[ast::attribute]) -> either<str, ast::foreign_abi> {
       option::none {
         either::right(ast::foreign_abi_cdecl)
       }
-      option::some(@"rust-intrinsic") {
+      option::some(@"rust-intrinsic"/~) {
         either::right(ast::foreign_abi_rust_intrinsic)
       }
-      option::some(@"cdecl") {
+      option::some(@"cdecl"/~) {
         either::right(ast::foreign_abi_cdecl)
       }
-      option::some(@"stdcall") {
+      option::some(@"stdcall"/~) {
         either::right(ast::foreign_abi_stdcall)
       }
       option::some(t) {
@@ -371,8 +371,8 @@ fn find_inline_attr(attrs: ~[ast::attribute]) -> inline_attr {
     // FIXME (#2809)---validate the usage of #[inline] and #[inline(always)]
     do vec::foldl(ia_none, attrs) |ia,attr| {
         alt attr.node.value.node {
-          ast::meta_word(@"inline") { ia_hint }
-          ast::meta_list(@"inline", items) {
+          ast::meta_word(@"inline"/~) { ia_hint }
+          ast::meta_list(@"inline"/~, items) {
             if !vec::is_empty(find_meta_items_by_name(items, "always")) {
                 ia_always
             } else {
diff --git a/src/libsyntax/diagnostic.rs b/src/libsyntax/diagnostic.rs
index 4e1d8f824e1..377d0864151 100644
--- a/src/libsyntax/diagnostic.rs
+++ b/src/libsyntax/diagnostic.rs
@@ -250,7 +250,7 @@ fn highlight_lines(cm: codemap::codemap, sp: span,
 
 fn print_macro_backtrace(cm: codemap::codemap, sp: span) {
     do option::iter (sp.expn_info) |ei| {
-        let ss = option::map_default(ei.callie.span, @"",
+        let ss = option::map_default(ei.callie.span, @""/~,
                                      |span| @codemap::span_to_str(span, cm));
         print_diagnostic(*ss, note,
                          #fmt("in expansion of #%s", ei.callie.name));
diff --git a/src/libsyntax/ext/auto_serialize.rs b/src/libsyntax/ext/auto_serialize.rs
index 119dbb59109..896ce16f585 100644
--- a/src/libsyntax/ext/auto_serialize.rs
+++ b/src/libsyntax/ext/auto_serialize.rs
@@ -92,7 +92,7 @@ fn expand(cx: ext_ctxt,
           _mitem: ast::meta_item,
           in_items: ~[@ast::item]) -> ~[@ast::item] {
     fn not_auto_serialize(a: ast::attribute) -> bool {
-        attr::get_attr_name(a) != @"auto_serialize"
+        attr::get_attr_name(a) != @"auto_serialize"/~
     }
 
     fn filter_attrs(item: @ast::item) -> @ast::item {
@@ -154,7 +154,7 @@ impl helpers for ext_ctxt {
         let args = do vec::map(input_tys) |ty| {
             {mode: ast::expl(ast::by_ref),
              ty: ty,
-             ident: @"",
+             ident: @""/~,
              id: self.next_id()}
         };
 
@@ -350,7 +350,7 @@ fn is_vec_or_str(ty: @ast::ty) -> bool {
       // This may be wrong if the user has shadowed (!) str
       ast::ty_path(@{span: _, global: _, idents: ids,
                              rp: none, types: _}, _)
-      if ids == ~[@"str"] { true }
+      if ids == ~[@"str"/~] { true }
       _ { false }
     }
 }
@@ -529,12 +529,12 @@ fn mk_ser_fn(cx: ext_ctxt, span: span, name: ast::ident,
 
     let ser_inputs: ~[ast::arg] =
         vec::append(~[{mode: ast::expl(ast::by_ref),
-                      ty: cx.ty_path(span, ~[@"__S"], ~[]),
-                      ident: @"__s",
+                      ty: cx.ty_path(span, ~[@"__S"/~], ~[]),
+                      ident: @"__s"/~,
                       id: cx.next_id()},
                      {mode: ast::expl(ast::by_ref),
                       ty: v_ty,
-                      ident: @"__v",
+                      ident: @"__v"/~,
                       id: cx.next_id()}],
                     tp_inputs);
 
@@ -552,12 +552,12 @@ fn mk_ser_fn(cx: ext_ctxt, span: span, name: ast::ident,
 
     let ser_bnds = @~[
         ast::bound_trait(cx.ty_path(span,
-                                    ~[@"std", @"serialization",
-                                     @"serializer"],
+                                    ~[@"std"/~, @"serialization"/~,
+                                     @"serializer"/~],
                                     ~[]))];
 
     let ser_tps: ~[ast::ty_param] =
-        vec::append(~[{ident: @"__S",
+        vec::append(~[{ident: @"__S"/~,
                       id: cx.next_id(),
                       bounds: ser_bnds}],
                     vec::map(tps, |tp| cx.clone_ty_param(tp)));
@@ -749,8 +749,8 @@ fn mk_deser_fn(cx: ext_ctxt, span: span,
 
     let deser_inputs: ~[ast::arg] =
         vec::append(~[{mode: ast::expl(ast::by_ref),
-                      ty: cx.ty_path(span, ~[@"__D"], ~[]),
-                      ident: @"__d",
+                      ty: cx.ty_path(span, ~[@"__D"/~], ~[]),
+                      ident: @"__d"/~,
                       id: cx.next_id()}],
                     tp_inputs);
 
@@ -768,11 +768,11 @@ fn mk_deser_fn(cx: ext_ctxt, span: span,
     let deser_bnds = @~[
         ast::bound_trait(cx.ty_path(
             span,
-            ~[@"std", @"serialization", @"deserializer"],
+            ~[@"std"/~, @"serialization"/~, @"deserializer"/~],
             ~[]))];
 
     let deser_tps: ~[ast::ty_param] =
-        vec::append(~[{ident: @"__D",
+        vec::append(~[{ident: @"__D"/~,
                       id: cx.next_id(),
                       bounds: deser_bnds}],
                     vec::map(tps, |tp| {
diff --git a/src/libsyntax/ext/fmt.rs b/src/libsyntax/ext/fmt.rs
index acf055ccabd..bacfe0d6e10 100644
--- a/src/libsyntax/ext/fmt.rs
+++ b/src/libsyntax/ext/fmt.rs
@@ -38,7 +38,7 @@ fn pieces_to_expr(cx: ext_ctxt, sp: span,
                   pieces: ~[piece], args: ~[@ast::expr])
    -> @ast::expr {
     fn make_path_vec(_cx: ext_ctxt, ident: ast::ident) -> ~[ast::ident] {
-        ret ~[@"extfmt", @"rt", ident];
+        ret ~[@"extfmt"/~, @"rt"/~, ident];
     }
     fn make_rt_path_expr(cx: ext_ctxt, sp: span,
                          ident: ast::ident) -> @ast::expr {
@@ -50,7 +50,7 @@ fn pieces_to_expr(cx: ext_ctxt, sp: span,
 
     fn make_rt_conv_expr(cx: ext_ctxt, sp: span, cnv: conv) -> @ast::expr {
         fn make_flags(cx: ext_ctxt, sp: span, flags: ~[flag]) -> @ast::expr {
-            let mut tmp_expr = make_rt_path_expr(cx, sp, @"flag_none");
+            let mut tmp_expr = make_rt_path_expr(cx, sp, @"flag_none"/~);
             for flags.each |f| {
                 let fstr = alt f {
                   flag_left_justify { "flag_left_justify" }
@@ -67,11 +67,11 @@ fn pieces_to_expr(cx: ext_ctxt, sp: span,
         fn make_count(cx: ext_ctxt, sp: span, cnt: count) -> @ast::expr {
             alt cnt {
               count_implied {
-                ret make_rt_path_expr(cx, sp, @"count_implied");
+                ret make_rt_path_expr(cx, sp, @"count_implied"/~);
               }
               count_is(c) {
                 let count_lit = mk_int(cx, sp, c);
-                let count_is_path = make_path_vec(cx, @"count_is");
+                let count_is_path = make_path_vec(cx, @"count_is"/~);
                 let count_is_args = ~[count_lit];
                 ret mk_call(cx, sp, count_is_path, count_is_args);
               }
@@ -97,10 +97,10 @@ fn pieces_to_expr(cx: ext_ctxt, sp: span,
                          width_expr: @ast::expr, precision_expr: @ast::expr,
                          ty_expr: @ast::expr) -> @ast::expr {
             ret mk_rec_e(cx, sp,
-                         ~[{ident: @"flags", ex: flags_expr},
-                          {ident: @"width", ex: width_expr},
-                          {ident: @"precision", ex: precision_expr},
-                          {ident: @"ty", ex: ty_expr}]);
+                         ~[{ident: @"flags"/~, ex: flags_expr},
+                          {ident: @"width"/~, ex: width_expr},
+                          {ident: @"precision"/~, ex: precision_expr},
+                          {ident: @"ty"/~, ex: ty_expr}]);
         }
         let rt_conv_flags = make_flags(cx, sp, cnv.flags);
         let rt_conv_width = make_count(cx, sp, cnv.width);
@@ -275,7 +275,7 @@ fn pieces_to_expr(cx: ext_ctxt, sp: span,
     }
 
     let arg_vec = mk_fixed_vec_e(cx, fmt_sp, piece_exprs);
-    ret mk_call(cx, fmt_sp, ~[@"str", @"concat"], ~[arg_vec]);
+    ret mk_call(cx, fmt_sp, ~[@"str"/~, @"concat"/~], ~[arg_vec]);
 }
 //
 // Local Variables:
diff --git a/src/libsyntax/ext/pipes/parse_proto.rs b/src/libsyntax/ext/pipes/parse_proto.rs
index 420de449a5c..4a3c9e4afec 100644
--- a/src/libsyntax/ext/pipes/parse_proto.rs
+++ b/src/libsyntax/ext/pipes/parse_proto.rs
@@ -28,8 +28,8 @@ impl proto_parser for parser {
         };
         self.bump();
         let dir = alt dir {
-          @"send" { send }
-          @"recv" { recv }
+          @"send"/~ { send }
+          @"recv"/~ { recv }
           _ { fail }
         };
 
diff --git a/src/libsyntax/ext/pipes/pipec.rs b/src/libsyntax/ext/pipes/pipec.rs
index 9f46e6b10ae..e55900968e8 100644
--- a/src/libsyntax/ext/pipes/pipec.rs
+++ b/src/libsyntax/ext/pipes/pipec.rs
@@ -75,7 +75,7 @@ impl methods for message {
             );
 
             let args_ast = vec::append(
-                ~[cx.arg_mode(@"pipe",
+                ~[cx.arg_mode(@"pipe"/~,
                               cx.ty_path(path(this.data_name())
                                         .add_tys(cx.ty_vars(this.ty_params))),
                               ast::by_copy)],
@@ -92,7 +92,7 @@ impl methods for message {
             body += #fmt("let message = %s::%s(%s);\n",
                          *this.proto.name,
                          *self.name(),
-                         str::connect(vec::append_one(arg_names, @"s")
+                         str::connect(vec::append_one(arg_names, @"s"/~)
                                       .map(|x| *x),
                                       ", "));
             body += #fmt("pipes::send(pipe, message);\n");
@@ -158,8 +158,8 @@ impl methods for state {
             let next_name = next.data_name();
 
             let dir = alt this.dir {
-              send { @"server" }
-              recv { @"client" }
+              send { @"server"/~ }
+              recv { @"client"/~ }
             };
 
             let v = cx.variant(name,
@@ -190,7 +190,7 @@ impl methods for state {
                   cx.item_ty_poly(
                       self.data_name(),
                       cx.ty_path(
-                          (@"pipes" + @(dir.to_str() + "_packet"))
+                          (@"pipes"/~ + @(dir.to_str() + "_packet"/~))
                           .add_ty(cx.ty_path(
                               (self.proto.name + self.data_name())
                               .add_tys(cx.ty_vars(self.ty_params))))),
@@ -281,10 +281,10 @@ impl methods for protocol {
         }
 
         vec::push(items,
-                  cx.item_mod(@"client",
+                  cx.item_mod(@"client"/~,
                               client_states));
         vec::push(items,
-                  cx.item_mod(@"server",
+                  cx.item_mod(@"server"/~,
                               server_states));
 
         cx.item_mod(self.name, items)
diff --git a/src/libsyntax/ext/qquote.rs b/src/libsyntax/ext/qquote.rs
index e82901f2b3f..c6a4ba1d916 100644
--- a/src/libsyntax/ext/qquote.rs
+++ b/src/libsyntax/ext/qquote.rs
@@ -35,7 +35,8 @@ impl of qq_helper for @ast::crate {
     fn visit(cx: aq_ctxt, v: vt<aq_ctxt>) {visit_crate(*self, cx, v);}
     fn extract_mac() -> option<ast::mac_> {fail}
     fn mk_parse_fn(cx: ext_ctxt, sp: span) -> @ast::expr {
-        mk_path(cx, sp, ~[@"syntax", @"ext", @"qquote", @"parse_crate"])
+        mk_path(cx, sp,
+                ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"parse_crate"/~])
     }
     fn get_fold_fn() -> str {"fold_crate"}
 }
@@ -49,7 +50,8 @@ impl of qq_helper for @ast::expr {
         }
     }
     fn mk_parse_fn(cx: ext_ctxt, sp: span) -> @ast::expr {
-        mk_path(cx, sp, ~[@"syntax", @"ext", @"qquote", @"parse_expr"])
+        mk_path(cx, sp,
+                ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"parse_expr"/~])
     }
     fn get_fold_fn() -> str {"fold_expr"}
 }
@@ -63,7 +65,8 @@ impl of qq_helper for @ast::ty {
         }
     }
     fn mk_parse_fn(cx: ext_ctxt, sp: span) -> @ast::expr {
-        mk_path(cx, sp, ~[@"syntax", @"ext", @"qquote", @"parse_ty"])
+        mk_path(cx, sp,
+                ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"parse_ty"/~])
     }
     fn get_fold_fn() -> str {"fold_ty"}
 }
@@ -72,7 +75,8 @@ impl of qq_helper for @ast::item {
     fn visit(cx: aq_ctxt, v: vt<aq_ctxt>) {visit_item(self, cx, v);}
     fn extract_mac() -> option<ast::mac_> {fail}
     fn mk_parse_fn(cx: ext_ctxt, sp: span) -> @ast::expr {
-        mk_path(cx, sp, ~[@"syntax", @"ext", @"qquote", @"parse_item"])
+        mk_path(cx, sp,
+                ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"parse_item"/~])
     }
     fn get_fold_fn() -> str {"fold_item"}
 }
@@ -81,7 +85,8 @@ impl of qq_helper for @ast::stmt {
     fn visit(cx: aq_ctxt, v: vt<aq_ctxt>) {visit_stmt(self, cx, v);}
     fn extract_mac() -> option<ast::mac_> {fail}
     fn mk_parse_fn(cx: ext_ctxt, sp: span) -> @ast::expr {
-        mk_path(cx, sp, ~[@"syntax", @"ext", @"qquote", @"parse_stmt"])
+        mk_path(cx, sp,
+                ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"parse_stmt"/~])
     }
     fn get_fold_fn() -> str {"fold_stmt"}
 }
@@ -90,7 +95,7 @@ impl of qq_helper for @ast::pat {
     fn visit(cx: aq_ctxt, v: vt<aq_ctxt>) {visit_pat(self, cx, v);}
     fn extract_mac() -> option<ast::mac_> {fail}
     fn mk_parse_fn(cx: ext_ctxt, sp: span) -> @ast::expr {
-        mk_path(cx, sp, ~[@"syntax", @"ext", @"qquote", @"parse_pat"])
+        mk_path(cx, sp, ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"parse_pat"/~])
     }
     fn get_fold_fn() -> str {"fold_pat"}
 }
@@ -228,19 +233,19 @@ fn finish<T: qq_helper>
     let cx = ecx;
 
     let cfg_call = || mk_call_(
-        cx, sp, mk_access(cx, sp, ~[@"ext_cx"], @"cfg"), ~[]);
+        cx, sp, mk_access(cx, sp, ~[@"ext_cx"/~], @"cfg"/~), ~[]);
 
     let parse_sess_call = || mk_call_(
-        cx, sp, mk_access(cx, sp, ~[@"ext_cx"], @"parse_sess"), ~[]);
+        cx, sp, mk_access(cx, sp, ~[@"ext_cx"/~], @"parse_sess"/~), ~[]);
 
     let pcall = mk_call(cx,sp,
-                       ~[@"syntax", @"parse", @"parser",
-                        @"parse_from_source_str"],
+                       ~[@"syntax"/~, @"parse"/~, @"parser"/~,
+                        @"parse_from_source_str"/~],
                        ~[node.mk_parse_fn(cx,sp),
                         mk_str(cx,sp, fname),
                         mk_call(cx,sp,
-                                ~[@"syntax",@"ext",
-                                 @"qquote", @"mk_file_substr"],
+                                ~[@"syntax"/~,@"ext"/~,
+                                 @"qquote"/~, @"mk_file_substr"/~],
                                 ~[mk_str(cx,sp, loc.file.name),
                                  mk_uint(cx,sp, loc.line),
                                  mk_uint(cx,sp, loc.col)]),
@@ -252,15 +257,15 @@ fn finish<T: qq_helper>
     let mut rcall = pcall;
     if (g_len > 0u) {
         rcall = mk_call(cx,sp,
-                        ~[@"syntax", @"ext", @"qquote", @"replace"],
+                        ~[@"syntax"/~, @"ext"/~, @"qquote"/~, @"replace"/~],
                         ~[pcall,
                           mk_uniq_vec_e(cx,sp, qcx.gather.map_to_vec(|g| {
                              mk_call(cx,sp,
-                                     ~[@"syntax", @"ext",
-                                      @"qquote", @g.constr],
+                                     ~[@"syntax"/~, @"ext"/~,
+                                      @"qquote"/~, @g.constr],
                                      ~[g.e])})),
                          mk_path(cx,sp,
-                                 ~[@"syntax", @"ext", @"qquote",
+                                 ~[@"syntax"/~, @"ext"/~, @"qquote"/~,
                                   @node.get_fold_fn()])]);
     }
     ret rcall;
diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs
index 822e8e0d697..b454dcfc0be 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -18,9 +18,9 @@ fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
 
     let argument_gram = ~[
         ms(mtc_rep(~[
-            ms(mtc_bb(@"lhs",@"mtcs", 0u)),
+            ms(mtc_bb(@"lhs"/~,@"mtcs"/~, 0u)),
             ms(mtc_tok(FAT_ARROW)),
-            ms(mtc_bb(@"rhs",@"tt", 1u)),
+            ms(mtc_bb(@"rhs"/~,@"tt"/~, 1u)),
         ], some(SEMI), false))];
 
     let arg_reader = new_tt_reader(cx.parse_sess().span_diagnostic,
@@ -31,11 +31,11 @@ fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
       failure(sp, msg) { cx.span_fatal(sp, msg); }
     };
 
-    let lhses = alt arguments.get(@"lhs") {
+    let lhses = alt arguments.get(@"lhs"/~) {
       @seq(s, sp) { s }
       _ { cx.span_bug(sp, "wrong-structured lhs") }
     };
-    let rhses = alt arguments.get(@"rhs") {
+    let rhses = alt arguments.get(@"rhs"/~) {
       @seq(s, sp) { s }
       _ { cx.span_bug(sp, "wrong-structured rhs") }
     };
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 5effab94397..2ab796db319 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -259,7 +259,7 @@ class parser {
                 let name = self.parse_value_ident();
                 p.bump();
                 name
-            } else { @"" };
+            } else { @""/~ };
 
             {mode: mode, ty: p.parse_ty(false), ident: name,
              id: p.get_id()}
@@ -1337,7 +1337,8 @@ class parser {
                 hi = e.span.hi;
                 // HACK: turn &[...] into a &-evec
                 ex = alt e.node {
-                  expr_vec(*) if m == m_imm {
+                  expr_vec(*) | expr_lit(@{node: lit_str(_), span: _})
+                  if m == m_imm {
                     expr_vstore(e, vstore_slice(self.region_from_name(none)))
                   }
                   _ { expr_addr_of(m, e) }
@@ -1353,7 +1354,8 @@ class parser {
             hi = e.span.hi;
             // HACK: turn @[...] into a @-evec
             ex = alt e.node {
-              expr_vec(*) if m == m_imm { expr_vstore(e, vstore_box) }
+              expr_vec(*) | expr_lit(@{node: lit_str(_), span: _})
+              if m == m_imm { expr_vstore(e, vstore_box) }
               _ { expr_unary(box(m), e) }
             };
           }
@@ -1364,7 +1366,8 @@ class parser {
             hi = e.span.hi;
             // HACK: turn ~[...] into a ~-evec
             ex = alt e.node {
-              expr_vec(*) if m == m_imm { expr_vstore(e, vstore_uniq) }
+              expr_vec(*) | expr_lit(@{node: lit_str(_), span: _})
+              if m == m_imm { expr_vstore(e, vstore_uniq) }
               _ { expr_unary(uniq(m), e) }
             };
           }
@@ -2134,12 +2137,16 @@ class parser {
     fn parse_method_name() -> ident {
         alt copy self.token {
           token::BINOP(op) { self.bump(); @token::binop_to_str(op) }
-          token::NOT { self.bump(); @"!" }
-          token::LBRACKET { self.bump(); self.expect(token::RBRACKET); @"[]" }
+          token::NOT { self.bump(); @"!"/~ }
+          token::LBRACKET {
+            self.bump();
+            self.expect(token::RBRACKET);
+            @"[]"/~
+          }
           _ {
             let id = self.parse_value_ident();
-            if id == @"unary" && self.eat(token::BINOP(token::MINUS)) {
-                @"unary-"
+            if id == @"unary"/~ && self.eat(token::BINOP(token::MINUS)) {
+                @"unary-"/~
             }
             else { id }
           }
diff --git a/src/libsyntax/visit.rs b/src/libsyntax/visit.rs
index be9f76650da..3387b716ec6 100644
--- a/src/libsyntax/visit.rs
+++ b/src/libsyntax/visit.rs
@@ -28,8 +28,8 @@ fn name_of_fn(fk: fn_kind) -> ident {
     alt fk {
       fk_item_fn(name, _) | fk_method(name, _, _)
           | fk_ctor(name, _, _, _) { /* FIXME (#2543) */ copy name }
-      fk_anon(*) | fk_fn_block(*) { @"anon" }
-      fk_dtor(*)                  { @"drop" }
+      fk_anon(*) | fk_fn_block(*) { @"anon"/~ }
+      fk_dtor(*)                  { @"drop"/~ }
     }
 }
 
diff --git a/src/rustc/driver/driver.rs b/src/rustc/driver/driver.rs
index cec72045bca..eda52e0dcf4 100644
--- a/src/rustc/driver/driver.rs
+++ b/src/rustc/driver/driver.rs
@@ -51,13 +51,13 @@ fn default_configuration(sess: session, argv0: str, input: input) ->
 
     ret ~[ // Target bindings.
          attr::mk_word_item(@os::family()),
-         mk(@"target_os", os::sysname()),
-         mk(@"target_family", os::family()),
-         mk(@"target_arch", arch),
-         mk(@"target_libc", libc),
+         mk(@"target_os"/~, os::sysname()),
+         mk(@"target_family"/~, os::family()),
+         mk(@"target_arch"/~, arch),
+         mk(@"target_libc"/~, libc),
          // Build bindings.
-         mk(@"build_compiler", argv0),
-         mk(@"build_input", source_name(input))];
+         mk(@"build_compiler"/~, argv0),
+         mk(@"build_input"/~, source_name(input))];
 }
 
 fn build_configuration(sess: session, argv0: str, input: input) ->
@@ -71,7 +71,7 @@ fn build_configuration(sess: session, argv0: str, input: input) ->
         {
             if sess.opts.test && !attr::contains_name(user_cfg, "test")
                {
-                ~[attr::mk_word_item(@"test")]
+                ~[attr::mk_word_item(@"test"/~)]
             } else { ~[] }
         };
     ret vec::append(vec::append(user_cfg, gen_cfg), default_cfg);
diff --git a/src/rustc/driver/session.rs b/src/rustc/driver/session.rs
index be21555a1d7..8daa4ec8e8a 100644
--- a/src/rustc/driver/session.rs
+++ b/src/rustc/driver/session.rs
@@ -217,7 +217,7 @@ fn building_library(req_crate_type: crate_type, crate: @ast::crate,
             alt syntax::attr::first_attr_value_str_by_name(
                 crate.node.attrs,
                 "crate_type") {
-              option::some(@"lib") { true }
+              option::some(@"lib"/~) { true }
               _ { false }
             }
         }
@@ -245,7 +245,7 @@ mod test {
             style: ast::attr_outer,
             value: ast_util::respan(ast_util::dummy_sp(),
                 ast::meta_name_value(
-                    @"crate_type",
+                    @"crate_type"/~,
                     ast_util::respan(ast_util::dummy_sp(),
                                      ast::lit_str(@t)))),
             is_sugared_doc: false
diff --git a/src/rustc/front/core_inject.rs b/src/rustc/front/core_inject.rs
index 446e0f25fae..c16fbabdcce 100644
--- a/src/rustc/front/core_inject.rs
+++ b/src/rustc/front/core_inject.rs
@@ -30,11 +30,11 @@ fn inject_libcore_ref(sess: session,
     let n1 = sess.next_node_id();
     let n2 = sess.next_node_id();
 
-    let vi1 = @{node: ast::view_item_use(@"core", ~[], n1),
+    let vi1 = @{node: ast::view_item_use(@"core"/~, ~[], n1),
                 attrs: ~[],
                 vis: ast::public,
                 span: dummy_sp()};
-    let vp = spanned(ast::view_path_glob(ident_to_path(dummy_sp(), @"core"),
+    let vp = spanned(ast::view_path_glob(ident_to_path(dummy_sp(), @"core"/~),
                                          n2));
     let vi2 = @{node: ast::view_item_import(~[vp]),
                 attrs: ~[],
diff --git a/src/rustc/front/test.rs b/src/rustc/front/test.rs
index 44d68a3fcd9..dfc6286055a 100644
--- a/src/rustc/front/test.rs
+++ b/src/rustc/front/test.rs
@@ -192,9 +192,9 @@ fn mk_test_module(cx: test_ctxt) -> @ast::item {
     let item_ = ast::item_mod(testmod);
     // This attribute tells resolve to let us call unexported functions
     let resolve_unexported_attr =
-        attr::mk_attr(attr::mk_word_item(@"!resolve_unexported"));
+        attr::mk_attr(attr::mk_word_item(@"!resolve_unexported"/~));
     let item: ast::item =
-        {ident: @"__test",
+        {ident: @"__test"/~,
          attrs: ~[resolve_unexported_attr],
          id: cx.sess.next_node_id(),
          node: item_,
@@ -233,7 +233,7 @@ fn mk_tests(cx: test_ctxt) -> @ast::item {
 
     let item_ = ast::item_fn(decl, ~[], body);
     let item: ast::item =
-        {ident: @"tests",
+        {ident: @"tests"/~,
          attrs: ~[],
          id: cx.sess.next_node_id(),
          node: item_,
@@ -248,17 +248,18 @@ fn mk_path(cx: test_ctxt, path: ~[ast::ident]) -> ~[ast::ident] {
     let is_std = {
         let items = attr::find_linkage_metas(cx.crate.node.attrs);
         alt attr::last_meta_item_value_str_by_name(items, "name") {
-          some(@"std") { true }
+          some(@"std"/~) { true }
           _ { false }
         }
     };
     if is_std { path }
-    else { vec::append(~[@"std"], path) }
+    else { vec::append(~[@"std"/~], path) }
 }
 
 // The ast::ty of ~[std::test::test_desc]
 fn mk_test_desc_vec_ty(cx: test_ctxt) -> @ast::ty {
-    let test_desc_ty_path = path_node(mk_path(cx, ~[@"test", @"test_desc"]));
+    let test_desc_ty_path =
+        path_node(mk_path(cx, ~[@"test"/~, @"test_desc"/~]));
 
     let test_desc_ty: ast::ty =
         {id: cx.sess.next_node_id(),
@@ -307,7 +308,7 @@ fn mk_test_desc_rec(cx: test_ctxt, test: test) -> @ast::expr {
          span: span};
 
     let name_field: ast::field =
-        nospan({mutbl: ast::m_imm, ident: @"name", expr: @name_expr});
+        nospan({mutbl: ast::m_imm, ident: @"name"/~, expr: @name_expr});
 
     let fn_path = path_node(path);
 
@@ -320,7 +321,7 @@ fn mk_test_desc_rec(cx: test_ctxt, test: test) -> @ast::expr {
     let fn_wrapper_expr = mk_test_wrapper(cx, fn_expr, span);
 
     let fn_field: ast::field =
-        nospan({mutbl: ast::m_imm, ident: @"fn", expr: fn_wrapper_expr});
+        nospan({mutbl: ast::m_imm, ident: @"fn"/~, expr: fn_wrapper_expr});
 
     let ignore_lit: ast::lit = nospan(ast::lit_bool(test.ignore));
 
@@ -331,7 +332,7 @@ fn mk_test_desc_rec(cx: test_ctxt, test: test) -> @ast::expr {
          span: span};
 
     let ignore_field: ast::field =
-        nospan({mutbl: ast::m_imm, ident: @"ignore", expr: @ignore_expr});
+        nospan({mutbl: ast::m_imm, ident: @"ignore"/~, expr: @ignore_expr});
 
     let fail_lit: ast::lit = nospan(ast::lit_bool(test.should_fail));
 
@@ -342,7 +343,9 @@ fn mk_test_desc_rec(cx: test_ctxt, test: test) -> @ast::expr {
          span: span};
 
     let fail_field: ast::field =
-        nospan({mutbl: ast::m_imm, ident: @"should_fail", expr: @fail_expr});
+        nospan({mutbl: ast::m_imm,
+                ident: @"should_fail"/~,
+                expr: @fail_expr});
 
     let desc_rec_: ast::expr_ =
         ast::expr_rec(~[name_field, fn_field, ignore_field, fail_field],
@@ -397,7 +400,7 @@ fn mk_test_wrapper(cx: test_ctxt,
 }
 
 fn mk_main(cx: test_ctxt) -> @ast::item {
-    let str_pt = path_node(~[@"str"]);
+    let str_pt = path_node(~[@"str"/~]);
     let str_ty = @{id: cx.sess.next_node_id(),
                    node: ast::ty_path(str_pt, cx.sess.next_node_id()),
                    span: dummy_sp()};
@@ -413,7 +416,7 @@ fn mk_main(cx: test_ctxt) -> @ast::item {
     let args_arg: ast::arg =
         {mode: ast::expl(ast::by_val),
          ty: @args_ty,
-         ident: @"args",
+         ident: @"args"/~,
          id: cx.sess.next_node_id()};
 
     let ret_ty = {id: cx.sess.next_node_id(),
@@ -436,7 +439,7 @@ fn mk_main(cx: test_ctxt) -> @ast::item {
 
     let item_ = ast::item_fn(decl, ~[], body);
     let item: ast::item =
-        {ident: @"main",
+        {ident: @"main"/~,
          attrs: ~[],
          id: cx.sess.next_node_id(),
          node: item_,
@@ -448,7 +451,7 @@ fn mk_main(cx: test_ctxt) -> @ast::item {
 fn mk_test_main_call(cx: test_ctxt) -> @ast::expr {
 
     // Get the args passed to main so we can pass the to test_main
-    let args_path = path_node(~[@"args"]);
+    let args_path = path_node(~[@"args"/~]);
 
     let args_path_expr_: ast::expr_ = ast::expr_path(args_path);
 
@@ -457,7 +460,7 @@ fn mk_test_main_call(cx: test_ctxt) -> @ast::expr {
          node: args_path_expr_, span: dummy_sp()};
 
     // Call __test::test to generate the vector of test_descs
-    let test_path = path_node(~[@"tests"]);
+    let test_path = path_node(~[@"tests"/~]);
 
     let test_path_expr_: ast::expr_ = ast::expr_path(test_path);
 
@@ -472,7 +475,7 @@ fn mk_test_main_call(cx: test_ctxt) -> @ast::expr {
          node: test_call_expr_, span: dummy_sp()};
 
     // Call std::test::test_main
-    let test_main_path = path_node(mk_path(cx, ~[@"test", @"test_main"]));
+    let test_main_path = path_node(mk_path(cx, ~[@"test"/~, @"test_main"/~]));
 
     let test_main_path_expr_: ast::expr_ = ast::expr_path(test_main_path);
 
diff --git a/src/rustc/metadata/creader.rs b/src/rustc/metadata/creader.rs
index 13a1d3543c5..09713da9c74 100644
--- a/src/rustc/metadata/creader.rs
+++ b/src/rustc/metadata/creader.rs
@@ -49,7 +49,7 @@ fn dump_crates(crate_cache: dvec<cache_entry>) {
         #debug("span: %?", entry.span);
         #debug("hash: %?", entry.hash);
         let attrs = ~[
-            attr::mk_attr(attr::mk_list_item(@"link", *entry.metas))
+            attr::mk_attr(attr::mk_list_item(@"link"/~, *entry.metas))
         ];
         for attr::find_linkage_attrs(attrs).each |attr| {
             #debug("meta: %s", pprust::attr_to_str(attr));
@@ -81,7 +81,7 @@ fn warn_if_multiple_versions(diag: span_handler,
             for matches.each |match| {
                 diag.span_note(match.span, "used here");
                 let attrs = ~[
-                    attr::mk_attr(attr::mk_list_item(@"link", *match.metas))
+                    attr::mk_attr(attr::mk_list_item(@"link"/~, *match.metas))
                 ];
                 loader::note_linkage_attrs(diag, attrs);
             }
@@ -168,7 +168,7 @@ fn metas_with(ident: ast::ident, key: ast::ident,
 
 fn metas_with_ident(ident: ast::ident,
                     metas: ~[@ast::meta_item]) -> ~[@ast::meta_item] {
-    metas_with(ident, @"name", metas)
+    metas_with(ident, @"name"/~, metas)
 }
 
 fn existing_match(e: env, metas: ~[@ast::meta_item], hash: str) ->
@@ -245,7 +245,7 @@ fn resolve_crate_deps(e: env, cdata: @~[u8]) -> cstore::cnum_map {
     for decoder::get_crate_deps(cdata).each |dep| {
         let extrn_cnum = dep.cnum;
         let cname = dep.name;
-        let cmetas = metas_with(dep.vers, @"vers", ~[]);
+        let cmetas = metas_with(dep.vers, @"vers"/~, ~[]);
         #debug("resolving dep crate %s ver: %s hash: %s",
                *dep.name, *dep.vers, *dep.hash);
         alt existing_match(e, metas_with_ident(cname, cmetas), *dep.hash) {
diff --git a/src/rustc/metadata/decoder.rs b/src/rustc/metadata/decoder.rs
index a1c42ebc263..bd3697a23b2 100644
--- a/src/rustc/metadata/decoder.rs
+++ b/src/rustc/metadata/decoder.rs
@@ -833,7 +833,7 @@ fn get_crate_vers(data: @~[u8]) -> @str/~ {
     ret alt attr::last_meta_item_value_str_by_name(
         attr::find_linkage_metas(attrs), "vers") {
       some(ver) { ver }
-      none { @"0.0" }
+      none { @"0.0"/~ }
     };
 }
 
diff --git a/src/rustc/metadata/encoder.rs b/src/rustc/metadata/encoder.rs
index 12106e5bc45..8b8df41ab43 100644
--- a/src/rustc/metadata/encoder.rs
+++ b/src/rustc/metadata/encoder.rs
@@ -802,7 +802,7 @@ fn encode_info_for_items(ecx: @encode_ctxt, ebml_w: ebml::writer,
     ebml_w.start_tag(tag_items_data);
     vec::push(*index, {val: crate_node_id, pos: ebml_w.writer.tell()});
     encode_info_for_mod(ecx, ebml_w, crate.node.module,
-                        crate_node_id, ~[], @"");
+                        crate_node_id, ~[], @""/~);
     visit::visit_crate(*crate, (), visit::mk_vt(@{
         visit_expr: |_e, _cx, _v| { },
         visit_item: |i, cx, v, copy ebml_w| {
@@ -952,18 +952,18 @@ fn synthesize_crate_attrs(ecx: @encode_ctxt, crate: @crate) -> ~[attribute] {
         assert (*ecx.link_meta.vers != "");
 
         let name_item =
-            attr::mk_name_value_item_str(@"name", *ecx.link_meta.name);
+            attr::mk_name_value_item_str(@"name"/~, *ecx.link_meta.name);
         let vers_item =
-            attr::mk_name_value_item_str(@"vers", *ecx.link_meta.vers);
+            attr::mk_name_value_item_str(@"vers"/~, *ecx.link_meta.vers);
 
         let other_items =
             {
-                let tmp = attr::remove_meta_items_by_name(items, @"name");
-                attr::remove_meta_items_by_name(tmp, @"vers")
+                let tmp = attr::remove_meta_items_by_name(items, @"name"/~);
+                attr::remove_meta_items_by_name(tmp, @"vers"/~)
             };
 
         let meta_items = vec::append(~[name_item, vers_item], other_items);
-        let link_item = attr::mk_list_item(@"link", meta_items);
+        let link_item = attr::mk_list_item(@"link"/~, meta_items);
 
         ret attr::mk_attr(link_item);
     }
diff --git a/src/rustc/middle/check_alt.rs b/src/rustc/middle/check_alt.rs
index 1d72e3e95d5..ed7c76d39ad 100644
--- a/src/rustc/middle/check_alt.rs
+++ b/src/rustc/middle/check_alt.rs
@@ -67,8 +67,8 @@ fn check_exhaustive(tcx: ty::ctxt, sp: span, pats: ~[@pat]) {
         alt ty::get(ty).struct {
           ty::ty_bool {
             alt check ctor {
-              val(const_int(1i64)) { some(@"true") }
-              val(const_int(0i64)) { some(@"false") }
+              val(const_int(1i64)) { some(@"true"/~) }
+              val(const_int(0i64)) { some(@"false"/~) }
             }
           }
           ty::ty_enum(id, _) {
diff --git a/src/rustc/middle/lint.rs b/src/rustc/middle/lint.rs
index 8c47fe1aaf1..c99c3a3a4fa 100644
--- a/src/rustc/middle/lint.rs
+++ b/src/rustc/middle/lint.rs
@@ -458,7 +458,7 @@ fn check_item_old_vecs(cx: ty::ctxt, it: @ast::item) {
               }
               ast::ty_path(@{span: _, global: _, idents: ids,
                              rp: none, types: _}, _)
-              if ids == ~[@"str"] && (! uses_vstore.contains_key(t.id)) {
+              if ids == ~[@"str"/~] && (! uses_vstore.contains_key(t.id)) {
                 cx.sess.span_lint(
                     old_strs, t.id, it.id,
                     t.span, "deprecated str type");
diff --git a/src/rustc/middle/liveness.rs b/src/rustc/middle/liveness.rs
index 5a65e786204..1987dcc0f63 100644
--- a/src/rustc/middle/liveness.rs
+++ b/src/rustc/middle/liveness.rs
@@ -290,8 +290,8 @@ class ir_maps {
         alt self.var_kinds[*var] {
           vk_local(_, name) | vk_arg(_, name, _) {name}
           vk_field(name) {@("self." + *name)}
-          vk_self {@"self"}
-          vk_implicit_ret {@"<implicit-ret>"}
+          vk_self {@"self"/~}
+          vk_implicit_ret {@"<implicit-ret>"/~}
         }
     }
 
diff --git a/src/rustc/middle/region.rs b/src/rustc/middle/region.rs
index 87640b5824e..532d85645df 100644
--- a/src/rustc/middle/region.rs
+++ b/src/rustc/middle/region.rs
@@ -505,7 +505,7 @@ impl methods for determine_rp_ctxt {
     fn region_is_relevant(r: @ast::region) -> bool {
         alt r.node {
           ast::re_anon {self.anon_implies_rp}
-          ast::re_named(@"self") {true}
+          ast::re_named(@"self"/~) {true}
           ast::re_named(_) {false}
         }
     }
diff --git a/src/rustc/middle/resolve.rs b/src/rustc/middle/resolve.rs
index 918d278a6f8..fb5c81caeb1 100644
--- a/src/rustc/middle/resolve.rs
+++ b/src/rustc/middle/resolve.rs
@@ -885,7 +885,7 @@ fn resolve_import(e: env, n_id: node_id, name: ast::ident,
     // import
     alt e.imports.find(n_id) {
       some(resolving(sp)) {
-        e.imports.insert(n_id, resolved(none, none, none, @~[], @"", sp));
+        e.imports.insert(n_id, resolved(none, none, none, @~[], @""/~, sp));
       }
       _ { }
     }
diff --git a/src/rustc/middle/resolve3.rs b/src/rustc/middle/resolve3.rs
index 8581af175d9..c2f97907319 100644
--- a/src/rustc/middle/resolve3.rs
+++ b/src/rustc/middle/resolve3.rs
@@ -560,22 +560,22 @@ class PrimitiveTypeTable {
     new(atom_table: @AtomTable) {
         self.primitive_types = atom_hashmap();
 
-        self.intern(atom_table, @"bool",    ty_bool);
-        self.intern(atom_table, @"char",    ty_int(ty_char));
-        self.intern(atom_table, @"float",   ty_float(ty_f));
-        self.intern(atom_table, @"f32",     ty_float(ty_f32));
-        self.intern(atom_table, @"f64",     ty_float(ty_f64));
-        self.intern(atom_table, @"int",     ty_int(ty_i));
-        self.intern(atom_table, @"i8",      ty_int(ty_i8));
-        self.intern(atom_table, @"i16",     ty_int(ty_i16));
-        self.intern(atom_table, @"i32",     ty_int(ty_i32));
-        self.intern(atom_table, @"i64",     ty_int(ty_i64));
-        self.intern(atom_table, @"str",     ty_str);
-        self.intern(atom_table, @"uint",    ty_uint(ty_u));
-        self.intern(atom_table, @"u8",      ty_uint(ty_u8));
-        self.intern(atom_table, @"u16",     ty_uint(ty_u16));
-        self.intern(atom_table, @"u32",     ty_uint(ty_u32));
-        self.intern(atom_table, @"u64",     ty_uint(ty_u64));
+        self.intern(atom_table, @"bool"/~,    ty_bool);
+        self.intern(atom_table, @"char"/~,    ty_int(ty_char));
+        self.intern(atom_table, @"float"/~,   ty_float(ty_f));
+        self.intern(atom_table, @"f32"/~,     ty_float(ty_f32));
+        self.intern(atom_table, @"f64"/~,     ty_float(ty_f64));
+        self.intern(atom_table, @"int"/~,     ty_int(ty_i));
+        self.intern(atom_table, @"i8"/~,      ty_int(ty_i8));
+        self.intern(atom_table, @"i16"/~,     ty_int(ty_i16));
+        self.intern(atom_table, @"i32"/~,     ty_int(ty_i32));
+        self.intern(atom_table, @"i64"/~,     ty_int(ty_i64));
+        self.intern(atom_table, @"str"/~,     ty_str);
+        self.intern(atom_table, @"uint"/~,    ty_uint(ty_u));
+        self.intern(atom_table, @"u8"/~,      ty_uint(ty_u8));
+        self.intern(atom_table, @"u16"/~,     ty_uint(ty_u16));
+        self.intern(atom_table, @"u32"/~,     ty_uint(ty_u32));
+        self.intern(atom_table, @"u64"/~,     ty_uint(ty_u64));
     }
 
     fn intern(atom_table: @AtomTable, string: @str/~,
@@ -651,7 +651,7 @@ class Resolver {
         self.type_ribs = @dvec();
         self.xray_context = NoXray;
 
-        self.self_atom = (*self.atom_table).intern(@"self");
+        self.self_atom = (*self.atom_table).intern(@"self"/~);
         self.primitive_type_table = @PrimitiveTypeTable(self.atom_table);
 
         self.namespaces = ~[ ModuleNS, TypeNS, ValueNS, ImplNS ];
@@ -4234,7 +4234,7 @@ class Resolver {
                     current_module = module;
                 }
                 BlockParentLink(module, node_id) {
-                    atoms.push((*self.atom_table).intern(@"<opaque>"));
+                    atoms.push((*self.atom_table).intern(@"<opaque>"/~));
                     current_module = module;
                 }
             }
diff --git a/src/rustc/middle/trans/base.rs b/src/rustc/middle/trans/base.rs
index 2b4447d71ce..17d00eb2ed9 100644
--- a/src/rustc/middle/trans/base.rs
+++ b/src/rustc/middle/trans/base.rs
@@ -486,8 +486,8 @@ fn declare_tydesc(ccx: @crate_ctxt, t: ty::t) -> @tydesc_info {
     let llalign = llalign_of(ccx, llty);
     //XXX this triggers duplicate LLVM symbols
     let name = if false /*ccx.sess.opts.debuginfo*/ {
-        mangle_internal_name_by_type_only(ccx, t, @"tydesc")
-    } else { mangle_internal_name_by_seq(ccx, @"tydesc") };
+        mangle_internal_name_by_type_only(ccx, t, @"tydesc"/~)
+    } else { mangle_internal_name_by_seq(ccx, @"tydesc"/~) };
     note_unique_llvm_symbol(ccx, name);
     log(debug, #fmt("+++ declare_tydesc %s %s", ty_to_str(ccx.tcx, t), name));
     let gvar = str::as_c_str(name, |buf| {
@@ -667,8 +667,8 @@ fn incr_refcnt_of_boxed(cx: block, box_ptr: ValueRef) {
 fn make_visit_glue(bcx: block, v: ValueRef, t: ty::t) {
     let _icx = bcx.insn_ctxt("make_visit_glue");
     let mut bcx = bcx;
-    assert bcx.ccx().tcx.intrinsic_defs.contains_key(@"ty_visitor");
-    let (iid, ty) = bcx.ccx().tcx.intrinsic_defs.get(@"ty_visitor");
+    assert bcx.ccx().tcx.intrinsic_defs.contains_key(@"ty_visitor"/~);
+    let (iid, ty) = bcx.ccx().tcx.intrinsic_defs.get(@"ty_visitor"/~);
     let v = PointerCast(bcx, v, T_ptr(type_of::type_of(bcx.ccx(), ty)));
     bcx = reflect::emit_calls_to_trait_visit_ty(bcx, t, v, iid);
     build_return(bcx);
@@ -2131,7 +2131,7 @@ fn monomorphic_fn(ccx: @crate_ctxt, fn_id: ast::def_id,
              must_cast: true};
       }
       ast_map::node_ctor(nm, _, ct, _, pt) { (pt, nm, ct.span) }
-      ast_map::node_dtor(_, dtor, _, pt) {(pt, @"drop", dtor.span)}
+      ast_map::node_dtor(_, dtor, _, pt) {(pt, @"drop"/~, dtor.span)}
       ast_map::node_expr(*) { ccx.tcx.sess.bug("Can't monomorphize an expr") }
       ast_map::node_export(*) {
           ccx.tcx.sess.bug("Can't monomorphize an export")
@@ -3825,7 +3825,7 @@ fn trans_log(log_ex: @ast::expr, lvl: @ast::expr,
         ccx.module_data.get(modname)
     } else {
         let s = link::mangle_internal_name_by_path_and_seq(
-            ccx, modpath, @"loglevel");
+            ccx, modpath, @"loglevel"/~);
         let global = str::as_c_str(s, |buf| {
             llvm::LLVMAddGlobal(ccx.llmod, T_i32(), buf)
         });
@@ -4563,7 +4563,7 @@ fn trans_enum_variant(ccx: @crate_ctxt, enum_id: ast::node_id,
     let fn_args = vec::map(variant.node.args, |varg|
         {mode: ast::expl(ast::by_copy),
          ty: varg.ty,
-         ident: @"arg",
+         ident: @"arg"/~,
          id: varg.id});
     let fcx = new_fn_ctxt_w_id(ccx, ~[], llfndecl, variant.node.id,
                                param_substs, none);
@@ -5215,7 +5215,7 @@ fn trans_constant(ccx: @crate_ctxt, it: @ast::item) {
         let path = item_path(ccx, it);
         for vec::each(variants) |variant| {
             let p = vec::append(path, ~[path_name(variant.node.name),
-                                       path_name(@"discrim")]);
+                                       path_name(@"discrim"/~)]);
             let s = mangle_exported_name(ccx, p, ty::mk_int(ccx.tcx));
             let disr_val = vi[i].disr_val;
             note_unique_llvm_symbol(ccx, s);
diff --git a/src/rustc/middle/trans/closure.rs b/src/rustc/middle/trans/closure.rs
index e04af18eec9..6b90ec30ab3 100644
--- a/src/rustc/middle/trans/closure.rs
+++ b/src/rustc/middle/trans/closure.rs
@@ -365,7 +365,7 @@ fn trans_expr_fn(bcx: block,
     let ccx = bcx.ccx(), bcx = bcx;
     let fty = node_id_type(bcx, id);
     let llfnty = type_of_fn_from_ty(ccx, fty);
-    let sub_path = vec::append_one(bcx.fcx.path, path_name(@"anon"));
+    let sub_path = vec::append_one(bcx.fcx.path, path_name(@"anon"/~));
     let s = mangle_internal_name_by_path(ccx, sub_path);
     let llfn = decl_internal_cdecl_fn(ccx.llmod, s, llfnty);
 
diff --git a/src/rustc/middle/trans/foreign.rs b/src/rustc/middle/trans/foreign.rs
index 859dd5b2d69..2a054b9fe7b 100644
--- a/src/rustc/middle/trans/foreign.rs
+++ b/src/rustc/middle/trans/foreign.rs
@@ -1001,7 +1001,7 @@ fn trans_foreign_fn(ccx: @crate_ctxt, path: ast_map::path, decl: ast::fn_decl,
         let _icx = ccx.insn_ctxt("foreign::foreign::build_rust_fn");
         let t = ty::node_id_to_type(ccx.tcx, id);
         let ps = link::mangle_internal_name_by_path(
-            ccx, vec::append_one(path, ast_map::path_name(@"__rust_abi")));
+            ccx, vec::append_one(path, ast_map::path_name(@"__rust_abi"/~)));
         let llty = type_of_fn_from_ty(ccx, t);
         let llfndecl = decl_internal_cdecl_fn(ccx.llmod, ps, llty);
         trans_fn(ccx, path, decl, body, llfndecl, no_self, none, id);
@@ -1039,7 +1039,7 @@ fn trans_foreign_fn(ccx: @crate_ctxt, path: ast_map::path, decl: ast::fn_decl,
 
         let shim_name = link::mangle_internal_name_by_path(
             ccx, vec::append_one(path,
-                                 ast_map::path_name(@"__rust_stack_shim")));
+                                 ast_map::path_name(@"__rust_stack_shim"/~)));
         ret build_shim_fn_(ccx, shim_name, llrustfn, tys,
                            lib::llvm::CCallConv,
                            build_args, build_ret);
diff --git a/src/rustc/middle/trans/reflect.rs b/src/rustc/middle/trans/reflect.rs
index 06adbf68dac..ec9e68ae1c0 100644
--- a/src/rustc/middle/trans/reflect.rs
+++ b/src/rustc/middle/trans/reflect.rs
@@ -297,8 +297,8 @@ fn emit_calls_to_trait_visit_ty(bcx: block, t: ty::t,
                                 visitor_iid: def_id) -> block {
 
     let final = sub_block(bcx, "final");
-    assert bcx.ccx().tcx.intrinsic_defs.contains_key(@"tydesc");
-    let (_, tydesc_ty) = bcx.ccx().tcx.intrinsic_defs.get(@"tydesc");
+    assert bcx.ccx().tcx.intrinsic_defs.contains_key(@"tydesc"/~);
+    let (_, tydesc_ty) = bcx.ccx().tcx.intrinsic_defs.get(@"tydesc"/~);
     let tydesc_ty = type_of::type_of(bcx.ccx(), tydesc_ty);
     let r = reflector({
         visitor_val: visitor_val,
diff --git a/src/rustc/middle/trans/shape.rs b/src/rustc/middle/trans/shape.rs
index f6be67b1512..607c20573ec 100644
--- a/src/rustc/middle/trans/shape.rs
+++ b/src/rustc/middle/trans/shape.rs
@@ -730,7 +730,7 @@ fn simplify_type(tcx: ty::ctxt, typ: ty::t) -> ty::t {
           ty::ty_class(did, substs) {
             let simpl_fields = (if is_some(ty::ty_dtor(tcx, did)) {
                 // remember the drop flag
-                  ~[{ident: @"drop", mt: {ty:
+                  ~[{ident: @"drop"/~, mt: {ty:
                                         ty::mk_u8(tcx),
                                         mutbl: ast::m_mutbl}}] }
                 else { ~[] }) +
diff --git a/src/rustc/middle/ty.rs b/src/rustc/middle/ty.rs
index 2dd9f414677..a0a3c818e5f 100644
--- a/src/rustc/middle/ty.rs
+++ b/src/rustc/middle/ty.rs
@@ -2661,7 +2661,7 @@ fn item_path(cx: ctxt, id: ast::def_id) -> ast_map::path {
             vec::append_one(*path, ast_map::path_name(nm))
           }
           ast_map::node_dtor(_, _, _, path) {
-            vec::append_one(*path, ast_map::path_name(@"dtor"))
+            vec::append_one(*path, ast_map::path_name(@"dtor"/~))
           }
 
 
diff --git a/src/rustc/middle/typeck/check.rs b/src/rustc/middle/typeck/check.rs
index 43dc46cd2b6..10b7ff78df7 100644
--- a/src/rustc/middle/typeck/check.rs
+++ b/src/rustc/middle/typeck/check.rs
@@ -1625,7 +1625,7 @@ fn check_expr_with_unifier(fcx: @fn_ctxt,
         let p_ty = fcx.expr_ty(p);
 
         let lkup = method::lookup(fcx, p, p, expr.id, alloc_id,
-                                  @"alloc", p_ty, ~[], false);
+                                  @"alloc"/~, p_ty, ~[], false);
         alt lkup.method() {
           some(entry) {
             fcx.ccx.method_map.insert(alloc_id, entry);
@@ -2282,10 +2282,10 @@ fn check_intrinsic_type(ccx: @crate_ctxt, it: @ast::foreign_item) {
         (1u, ~[], ty::mk_nil_ptr(tcx))
       }
       "visit_tydesc" {
-        assert ccx.tcx.intrinsic_defs.contains_key(@"tydesc");
-        assert ccx.tcx.intrinsic_defs.contains_key(@"ty_visitor");
-        let (_, tydesc_ty) = ccx.tcx.intrinsic_defs.get(@"tydesc");
-        let (_, visitor_trait) = ccx.tcx.intrinsic_defs.get(@"ty_visitor");
+        assert ccx.tcx.intrinsic_defs.contains_key(@"tydesc"/~);
+        assert ccx.tcx.intrinsic_defs.contains_key(@"ty_visitor"/~);
+        let (_, tydesc_ty) = ccx.tcx.intrinsic_defs.get(@"tydesc"/~);
+        let (_, visitor_trait) = ccx.tcx.intrinsic_defs.get(@"ty_visitor"/~);
         let td_ptr = ty::mk_ptr(ccx.tcx, {ty: tydesc_ty,
                                           mutbl: ast::m_imm});
         (0u, ~[arg(ast::by_val, td_ptr),
diff --git a/src/rustc/util/common.rs b/src/rustc/util/common.rs
index 26b30772105..90ff2fd3228 100644
--- a/src/rustc/util/common.rs
+++ b/src/rustc/util/common.rs
@@ -74,7 +74,7 @@ fn local_rhs_span(l: @ast::local, def: span) -> span {
 fn is_main_name(path: syntax::ast_map::path) -> bool {
     // FIXME (#34): path should be a constrained type, so we know
     // the call to last doesn't fail.
-    vec::last(path) == syntax::ast_map::path_name(@"main")
+    vec::last(path) == syntax::ast_map::path_name(@"main"/~)
 }
 
 //
diff --git a/src/rustdoc/markdown_index_pass.rs b/src/rustdoc/markdown_index_pass.rs
index 6532f572c6d..52dc7cabee0 100644
--- a/src/rustdoc/markdown_index_pass.rs
+++ b/src/rustdoc/markdown_index_pass.rs
@@ -116,7 +116,7 @@ fn pandoc_header_id(header: str) -> str {
         let s = str::replace(s, "]", "");
         let s = str::replace(s, "(", "");
         let s = str::replace(s, ")", "");
-        let s = str::replace(s, "@", "");
+        let s = str::replace(s, "@", "/~"/~);
         let s = str::replace(s, "~", "");
         let s = str::replace(s, "/", "");
         let s = str::replace(s, ":", "");
diff --git a/src/test/run-fail/unwind-box-str.rs b/src/test/run-fail/unwind-box-str.rs
index e0cd34b784b..8da8043c854 100644
--- a/src/test/run-fail/unwind-box-str.rs
+++ b/src/test/run-fail/unwind-box-str.rs
@@ -5,7 +5,7 @@ fn failfn() {
 }
 
 fn main() {
-    let x = @"hi";
+    let x = @"hi"/~;
     failfn();
     log(error, x);
 }
\ No newline at end of file
diff --git a/src/test/run-fail/unwind-lambda.rs b/src/test/run-fail/unwind-lambda.rs
index 360d9cdeba3..f76d710d502 100644
--- a/src/test/run-fail/unwind-lambda.rs
+++ b/src/test/run-fail/unwind-lambda.rs
@@ -2,7 +2,7 @@
 
 fn main() {
     let cheese = "roquefort";
-    let carrots = @"crunchy";
+    let carrots = @"crunchy"/~;
 
     fn@(tasties: @str/~, macerate: fn(str)) {
         macerate(*tasties);
diff --git a/src/test/run-fail/unwind-misc-1.rs b/src/test/run-fail/unwind-misc-1.rs
index 9eb7f88caee..72b176e80c5 100644
--- a/src/test/run-fail/unwind-misc-1.rs
+++ b/src/test/run-fail/unwind-misc-1.rs
@@ -18,8 +18,8 @@ fn main() {
     let map = map::hashmap(hash, eq);
     let mut arr = ~[];
     for uint::range(0u, 10u) |i| {
-        arr += ~[@"key stuff"];
-        map.insert(arr, arr + ~[@"value stuff"]);
+        arr += ~[@"key stuff"/~];
+        map.insert(arr, arr + ~[@"value stuff"/~]);
     }
-    map.insert(~[@"boom"], ~[]);
+    map.insert(~[@"boom"/~], ~[]);
 }
diff --git a/src/test/run-pass/box-compare.rs b/src/test/run-pass/box-compare.rs
index 51eeb6e8eb7..3102166b390 100644
--- a/src/test/run-pass/box-compare.rs
+++ b/src/test/run-pass/box-compare.rs
@@ -2,6 +2,6 @@
 
 fn main() {
     assert (@1 < @3);
-    assert (@@"hello " > @@"hello");
-    assert (@@@"hello" != @@@"there");
+    assert (@@"hello "/~ > @@"hello"/~);
+    assert (@@@"hello"/~ != @@@"there"/~);
 }
diff --git a/src/test/run-pass/issue-2631-b.rs b/src/test/run-pass/issue-2631-b.rs
index fbacb4fee72..6a3025be697 100644
--- a/src/test/run-pass/issue-2631-b.rs
+++ b/src/test/run-pass/issue-2631-b.rs
@@ -10,7 +10,7 @@ import std::map::str_hash;
 import dvec;
 
 fn main() {
-  let v = ~[mut @"hi"];
+  let v = ~[mut @"hi"/~];
   let m: req::header_map = str_hash();
   m.insert("METHOD", @dvec::from_vec(v));
   request::<int>(m);
diff --git a/src/test/run-pass/issue-2734.rs b/src/test/run-pass/issue-2734.rs
index 4b7c09bd1e9..25f23bdf384 100644
--- a/src/test/run-pass/issue-2734.rs
+++ b/src/test/run-pass/issue-2734.rs
@@ -6,7 +6,7 @@ fn perform_hax<T>(x: @T) -> hax {
 }
 
 fn deadcode() {
-    perform_hax(@"deadcode");
+    perform_hax(@"deadcode"/~);
 }
 
 fn main() {
diff --git a/src/test/run-pass/issue-2735.rs b/src/test/run-pass/issue-2735.rs
index d896473d20f..6c2f28c88b6 100644
--- a/src/test/run-pass/issue-2735.rs
+++ b/src/test/run-pass/issue-2735.rs
@@ -6,7 +6,7 @@ fn perform_hax<T>(x: @T) -> hax {
 }
 
 fn deadcode() {
-    perform_hax(@"deadcode");
+    perform_hax(@"deadcode"/~);
 }
 
 fn main() {