Allow blocks in const expressions

Only blocks with tail expressions that are const expressions
and items are allowed.

1 files changed, 49 insertions, 0 deletions

diff --git a/src/test/run-pass/const-block-item-macro-codegen.rs b/src/test/run-pass/const-block-item-macro-codegen.rs
new file mode 100644
index 00000000000..09f26b15734
--- /dev/null
+++ b/src/test/run-pass/const-block-item-macro-codegen.rs
@@ -0,0 +1,49 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// General test that function items in static blocks
+// can be generated with a macro.
+
+#![feature(macro_rules)]
+
+struct MyType {
+    desc: &'static str,
+    data: uint,
+    code: fn(uint, uint) -> uint
+}
+
+impl MyType {
+    fn eval(&self, a: uint) -> uint {
+        (self.code)(self.data, a)
+    }
+}
+
+macro_rules! codegen {
+    ($e:expr, $v:expr) => {
+        {
+            fn generated(a: uint, b: uint) -> uint {
+                a - ($e * b)
+            }
+            MyType {
+                desc: "test",
+                data: $v,
+                code: generated
+            }
+        }
+    }
+}
+
+static GENERATED_CODE_1: MyType = codegen!(2, 100);
+static GENERATED_CODE_2: MyType = codegen!(5, 1000);
+
+pub fn main() {
+    assert_eq!(GENERATED_CODE_1.eval(10), 80);
+    assert_eq!(GENERATED_CODE_2.eval(100), 500);
+}