Allow multiple exports in a single export statement. Issue #817

Author: brson

src/comp/syntax/ast.rs

@@ -564,7 +564,7 @@ tag view_item_ {
     view_item_use(ident, [@meta_item], node_id);
     view_item_import(ident, [ident], node_id);
     view_item_import_glob([ident], node_id);
-    view_item_export(ident, node_id);
+    view_item_export([ident], node_id);
 }
 
 type obj_def_ids = {ty: node_id, ctor: node_id};
@@ -627,11 +627,11 @@ fn is_exported(i: ident, m: _mod) -> bool {
     let count = 0u;
     for vi: @ast::view_item in m.view_items {
         alt vi.node {
-          ast::view_item_export(id, _) {
-            if str::eq(i, id) {
-                // even if it's nonlocal (since it's explicit)
-
-                ret true;
+          ast::view_item_export(ids, _) {
+            for id in ids {
+                if str::eq(i, id) {
+                    ret true;
+                }
             }
             count += 1u;
           }
@@ -640,7 +640,7 @@ fn is_exported(i: ident, m: _mod) -> bool {
     }
     // If there are no declared exports then
     // everything not imported is exported
-
+    // even if it's nonlocal (since it's explicit)
     ret count == 0u && !nonlocal;
 }
 

src/comp/syntax/parse/parser.rs

@@ -2353,8 +2353,9 @@ fn parse_import(p: &parser) -> ast::view_item_ {
 }
 
 fn parse_export(p: &parser) -> ast::view_item_ {
-    let id = parse_ident(p);
-    ret ast::view_item_export(id, p.get_id());
+    let ids = parse_seq_to_before_end(
+        token::SEMI, option::some(token::COMMA), parse_ident, p);
+    ret ast::view_item_export(ids, p.get_id());
 }
 
 fn parse_view_item(p: &parser) -> @ast::view_item {

src/comp/syntax/print/pprust.rs

@@ -1276,7 +1276,11 @@ fn print_view_item(s: &ps, item: &@ast::view_item) {
         }
         word(s.s, "::*");
       }
-      ast::view_item_export(id, _) { head(s, "export"); word(s.s, id); }
+      ast::view_item_export(ids, _) {
+        head(s, "export");
+        commasep(s, inconsistent, ids,
+                 fn(s: &ps, w: &str) { word(s.s, w) });
+      }
     }
     word(s.s, ";");
     end(s); // end inner head-block

src/test/run-pass/export-multi.rs

@@ -0,0 +1,16 @@
+import m::f;
+import m::g;
+
+mod m {
+    export f, g;
+
+    fn f() {}
+    fn g() {}
+}
+
+fn main() {
+    f();
+    g();
+    m::f();
+    m::g();
+}