added string_to_tts

src/libsyntax/util/parser_testing.rs

@@ -22,6 +22,12 @@ pub fn string_to_tts_and_sess (source_str : @str) -> (~[ast::token_tree],@mut Pa
     (filemap_to_tts(ps,string_to_filemap(ps,source_str,@"bogofile")),ps)
 }
 
+// map a string to tts, using a made-up filename:
+pub fn string_to_tts(source_str : @str) -> ~[ast::token_tree] {
+    let (tts,_) = string_to_tts_and_sess(source_str);
+    tts
+}
+
 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)