Parse 'import' directives in rustc.

src/comp/front/parser.rs

@@ -1562,6 +1562,45 @@ fn stmt_ends_with_semi(@ast.stmt stmt) -> bool {
     }
 }
 
+impure fn parse_rest_import_name(parser p, ast.ident id) {
+    while (p.peek() != token.SEMI) {
+        expect(p, token.DOT);
+        parse_ident(p);
+    }
+}
+
+impure fn parse_full_import_name(parser p) {
+    alt (p.peek()) {
+        case (token.IDENT(?ident)) {
+            p.bump();
+            parse_rest_import_name(p, ident);
+        }
+        case (_) {
+            p.err("expecting an identifier");
+        }
+    }
+}
+
+impure fn parse_import(parser p) {
+    alt (p.peek()) {
+        case (token.IDENT(?ident)) {
+            p.bump();
+            alt (p.peek()) {
+                case (token.EQ) {
+                    p.bump();
+                    parse_full_import_name(p);
+                }
+                case (_) {
+                    parse_rest_import_name(p, ident);
+                }
+            }
+        }
+        case (_) {
+            p.err("expecting an identifier");
+        }
+    }
+}
+
 impure fn parse_use_and_imports(parser p) {
     while (true) {
         alt (p.peek()) {
@@ -1571,6 +1610,11 @@ fn stmt_ends_with_semi(@ast.stmt stmt) -> bool {
                 parse_optional_meta(p);
                 expect(p, token.SEMI);
             }
+            case (token.IMPORT) {
+                p.bump();
+                parse_import(p);
+                expect(p, token.SEMI);
+            }
             case (_) {
                 ret;
             }

src/test/run-pass/use.rs

@@ -3,11 +3,18 @@
 use zed(name = "std");
 use bar(name = "std", ver = "0.0.1");
 
+import std._str;
+import x = std._str;
+
+
 mod baz {
   use std;
   use libc();
   use zed(name = "std");
   use bar(name = "std", ver = "0.0.1");
+
+  import std._str;
+  import x = std._str;
 }
 
 fn main() {