rustc: Move some attribute accessors from rustdoc to rustc

Author: brson

src/comp/front/attr.rs

@@ -20,6 +20,9 @@ export get_meta_item_name;
 export get_meta_item_value_str;
 export get_meta_item_value_str_by_name;
 export get_meta_item_list;
+export meta_item_value_from_list;
+export meta_item_list_from_list;
+export name_value_str_pair;
 export mk_name_value_item_str;
 export mk_name_value_item;
 export mk_list_item;
@@ -217,6 +220,53 @@ fn native_abi(attrs: [ast::attribute]) -> either::t<str, ast::native_abi> {
     };
 }
 
+fn meta_item_from_list(
+    items: [@ast::meta_item],
+    name: str
+) -> option<@ast::meta_item> {
+    let items = attr::find_meta_items_by_name(items, name);
+    vec::last(items)
+}
+
+fn meta_item_value_from_list(
+    items: [@ast::meta_item],
+    name: str
+) -> option<str> {
+    alt meta_item_from_list(items, name) {
+      some(item) {
+        alt attr::get_meta_item_value_str(item) {
+          some(value) { some(value) }
+          none. { none }
+        }
+      }
+      none. { none }
+    }
+}
+
+fn meta_item_list_from_list(
+    items: [@ast::meta_item],
+    name: str
+) -> option<[@ast::meta_item]> {
+    alt meta_item_from_list(items, name) {
+      some(item) {
+        attr::get_meta_item_list(item)
+      }
+      none. { none }
+    }
+}
+
+fn name_value_str_pair(
+    item: @ast::meta_item
+) -> option<(str, str)> {
+    alt attr::get_meta_item_value_str(item) {
+      some(value) {
+        let name = attr::get_meta_item_name(item);
+        some((name, value))
+      }
+      none. { none }
+    }
+}
+
 fn span<T: copy>(item: T) -> ast::spanned<T> {
     ret {node: item, span: ast_util::dummy_sp()};
 }

src/rustdoc/attr_parser.rs

@@ -71,64 +71,17 @@ fn parse_fn(
     };
 }
 
-fn meta_item_from_list(
-    items: [@ast::meta_item],
-    name: str
-) -> option<@ast::meta_item> {
-    let items = attr::find_meta_items_by_name(items, name);
-    vec::last(items)
-}
-
-fn meta_item_value_from_list(
-    items: [@ast::meta_item],
-    name: str
-) -> option<str> {
-    alt meta_item_from_list(items, name) {
-      some(item) {
-        alt attr::get_meta_item_value_str(item) {
-          some(value) { some(value) }
-          none. { none }
-        }
-      }
-      none. { none }
-    }
-}
-
-fn meta_item_list_from_list(
-    items: [@ast::meta_item],
-    name: str
-) -> option<[@ast::meta_item]> {
-    alt meta_item_from_list(items, name) {
-      some(item) {
-        attr::get_meta_item_list(item)
-      }
-      none. { none }
-    }
-}
-
-fn name_value_str_pair(
-    item: @ast::meta_item
-) -> option<(str, str)> {
-    alt attr::get_meta_item_value_str(item) {
-      some(value) {
-        let name = attr::get_meta_item_name(item);
-        some((name, value))
-      }
-      none. { none }
-    }
-}
-
 fn parse_fn_(
     items: [@ast::meta_item]
 ) -> fn_attrs {
-    let brief = meta_item_value_from_list(items, "brief");
-    let desc = meta_item_value_from_list(items, "desc");
-    let return = meta_item_value_from_list(items, "return");
+    let brief = attr::meta_item_value_from_list(items, "brief");
+    let desc = attr::meta_item_value_from_list(items, "desc");
+    let return = attr::meta_item_value_from_list(items, "return");
 
-    let args = alt meta_item_list_from_list(items, "args") {
+    let args = alt attr::meta_item_list_from_list(items, "args") {
       some(items) {
         vec::filter_map(items) {|item|
-            option::map(name_value_str_pair(item)) { |pair|
+            option::map(attr::name_value_str_pair(item)) { |pair|
                 {
                     name: util::fst(pair),
                     desc: util::snd(pair)