Add more tests for alt expressions

src/test/run-pass/expr-alt-box.rs

@@ -0,0 +1,27 @@
+// xfail-boot
+// -*- rust -*-
+
+// Tests for alt as expressions resulting in boxed types
+
+fn test_box() {
+  auto res = alt (true) {
+    case (true) {
+      @100
+    }
+  };
+  check (*res == 100);
+}
+
+fn test_str() {
+  auto res = alt (true) {
+    case (true) {
+      "happy"
+    }
+  };
+  check (res == "happy");
+}
+
+fn main() {
+  test_box();
+  test_str();
+}

src/test/run-pass/expr-alt-struct.rs

@@ -0,0 +1,35 @@
+// xfail-boot
+// -*- rust -*-
+
+// Tests for alt as expressions resulting in structural types
+
+fn test_rec() {
+  auto res = alt (true) {
+    case (true) {
+      rec(i = 100)
+    }
+  };
+  check (res == rec(i = 100));
+}
+
+fn test_tag() {
+  tag mood {
+    happy;
+    sad;
+  }
+
+  auto res = alt (true) {
+    case (true) {
+      happy
+    }
+    case (false) {
+      sad
+    }
+  };
+  check (res == happy);
+}
+
+fn main() {
+  test_rec();
+  test_tag();
+}

src/test/run-pass/expr-alt.rs

@@ -3,7 +3,7 @@
 
 // Tests for using alt as an expression
 
-fn test() {
+fn test_basic() {
   let bool res = alt (true) {
     case (true) {
       true
@@ -25,6 +25,53 @@ fn test() {
   check (res);
 }
 
-fn main() {
-  test();
+fn test_inferrence() {
+  auto res = alt (true) {
+    case (true) {
+      true
+    }
+    case (false) {
+      false
+    }
+  };
+  check (res);
+}
+
+fn test_alt_as_alt_head() {
+  // Yeah, this is kind of confusing ...
+  auto res = alt(alt (false) { case (true) { true } case (false) {false} }) {
+    case (true) {
+      false
+    }
+    case (false) {
+      true
+    }
+  };
+  check (res);
+}
+
+fn test_alt_as_block_result() {
+  auto res = alt (false) {
+    case (true) {
+      false
+    }
+    case (false) {
+      alt (true) {
+        case (true) {
+          true
+        }
+        case (false) {
+          false
+        }
+      }
+    }
+  };
+  check (res);
+}
+
+fn main() {
+  test_basic();
+  test_inferrence();
+  test_alt_as_alt_head();
+  test_alt_as_block_result();
 }