rustdoc: Move parse module to its own file

src/rustdoc/parse.rs

@@ -0,0 +1,21 @@
+export from_file, from_str;
+
+fn new_parse_sess() -> parser::parse_sess {
+    let cm = codemap::new_codemap();
+    let sess = @{
+        cm: cm,
+        mutable next_id: 0,
+        diagnostic: diagnostic::mk_handler(cm, none)
+    };
+    ret sess;
+}
+
+fn from_file(file: str) -> @ast::crate {
+    parser::parse_crate_from_source_file(
+        file, [], new_parse_sess())
+}
+
+fn from_str(source: str) -> @ast::crate {
+    parser::parse_crate_from_source_str(
+        "-", source, [], new_parse_sess())
+}