Implement simple module export

src/test/compile-fail/export-boot.rs

@@ -0,0 +1,19 @@
+// xfail-stage0
+// error-pattern: unknown module item
+
+// rustboot has a different error message than rustc
+// this test can die with rustboot, or rustc's error can change
+
+mod foo {
+  export x;
+  fn x(int y) {
+    log y;
+  }
+  fn z(int y) {
+    log y;
+  }
+}
+
+fn main() {
+  foo.z(10);
+}

src/test/compile-fail/export.rs

@@ -1,5 +1,5 @@
-// xfail-stage0
-// error-pattern: unknown module item
+// xfail-boot
+// error-pattern: unresolved name
 mod foo {
   export x;
   fn x(int y) {

src/test/compile-fail/export2.rs

@@ -0,0 +1,25 @@
+// xfail-boot
+// error-pattern: unresolved name
+
+mod foo {
+  export x;
+
+  fn x() {
+    bar.x();
+  }
+}
+
+mod bar {
+  export y;
+
+  fn x() {
+    log "x";
+  }
+
+  fn y() {
+  }
+}
+
+fn main() {
+  foo.x();
+}