Prevent promises from blocking on print. Fixes #680

Signed-off-by: Stuart Halloway <stu@thinkrelevance.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/jvm/clojure/lang/IPromiseImpl.java b/src/jvm/clojure/lang/IPromiseImpl.java
new file mode 100644
index 00000000..686e4389
--- /dev/null
+++ b/src/jvm/clojure/lang/IPromiseImpl.java
@@ -0,0 +1,15 @@
+/**
+ *   Copyright (c) Rich Hickey. All rights reserved.
+ *   The use and distribution terms for this software are covered by the
+ *   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+ *   which can be found in the file epl-v10.html at the root of this distribution.
+ *   By using this software in any fashion, you are agreeing to be bound by
+ * 	 the terms of this license.
+ *   You must not remove this notice, or any other, from this software.
+ **/
+
+package clojure.lang;
+
+public interface IPromiseImpl {
+    boolean hasValue();
+}