Use @str instead of @~str in libsyntax and librustc. Fixes #5048.

This almost removes the StringRef wrapper, since all strings are
Equiv-alent now. Removes a lot of `/* bad */ copy *`'s, and converts
several things to be &'static str (the lint table and the intrinsics
table).

There are many instances of .to_managed(), unfortunately.

src/libsyntax/util/parser_testing.rs

@@ -18,50 +18,50 @@ use parse::token;
 
 // map a string to tts, using a made-up filename: return both the token_trees
 // and the ParseSess
-pub fn string_to_tts_and_sess (source_str : @~str) -> (~[ast::token_tree],@mut ParseSess) {
+pub fn string_to_tts_and_sess (source_str : @str) -> (~[ast::token_tree],@mut ParseSess) {
     let ps = new_parse_sess(None);
-    (filemap_to_tts(ps,string_to_filemap(ps,source_str,~"bogofile")),ps)
+    (filemap_to_tts(ps,string_to_filemap(ps,source_str,@"bogofile")),ps)
 }
 
-pub fn string_to_parser_and_sess(source_str: @~str) -> (Parser,@mut ParseSess) {
+pub fn string_to_parser_and_sess(source_str: @str) -> (Parser,@mut ParseSess) {
     let ps = new_parse_sess(None);
-    (new_parser_from_source_str(ps,~[],~"bogofile",source_str),ps)
+    (new_parser_from_source_str(ps,~[],@"bogofile",source_str),ps)
 }
 
 // map string to parser (via tts)
-pub fn string_to_parser(source_str: @~str) -> Parser {
+pub fn string_to_parser(source_str: @str) -> Parser {
     let (p,_) = string_to_parser_and_sess(source_str);
     p
 }
 
-pub fn string_to_crate (source_str : @~str) -> @ast::crate {
+pub fn string_to_crate (source_str : @str) -> @ast::crate {
     string_to_parser(source_str).parse_crate_mod()
 }
 
 // parse a string, return an expr
-pub fn string_to_expr (source_str : @~str) -> @ast::expr {
+pub fn string_to_expr (source_str : @str) -> @ast::expr {
     string_to_parser(source_str).parse_expr()
 }
 
 // parse a string, return an item
-pub fn string_to_item (source_str : @~str) -> Option<@ast::item> {
+pub fn string_to_item (source_str : @str) -> Option<@ast::item> {
     string_to_parser(source_str).parse_item(~[])
 }
 
 // parse a string, return an item and the ParseSess
-pub fn string_to_item_and_sess (source_str : @~str) -> (Option<@ast::item>,@mut ParseSess) {
+pub fn string_to_item_and_sess (source_str : @str) -> (Option<@ast::item>,@mut ParseSess) {
     let (p,ps) = string_to_parser_and_sess(source_str);
     (p.parse_item(~[]),ps)
 }
 
 // parse a string, return a stmt
-pub fn string_to_stmt(source_str : @~str) -> @ast::stmt {
+pub fn string_to_stmt(source_str : @str) -> @ast::stmt {
     string_to_parser(source_str).parse_stmt(~[])
 }
 
 // parse a string, return a pat. Uses "irrefutable"... which doesn't
 // (currently) affect parsing.
-pub fn string_to_pat(source_str : @~str) -> @ast::pat {
+pub fn string_to_pat(source_str : @str) -> @ast::pat {
     string_to_parser(source_str).parse_pat()
 }