allow constant evaluation of function calls

1 files changed, 19 insertions, 0 deletions

diff --git a/src/test/run-pass/const-fn-const-eval.rs b/src/test/run-pass/const-fn-const-eval.rs
new file mode 100644
index 00000000000..77c70fe7f63
--- /dev/null
+++ b/src/test/run-pass/const-fn-const-eval.rs
@@ -0,0 +1,19 @@
+// Copyright 2012-2014 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.
+
+#![feature(const_fn)]
+
+const fn add(x: usize, y: usize) -> usize {
+    x + y
+}
+
+const ARR: [i32; add(1, 2)] = [5, 6, 7];
+
+pub fn main() {}