From ee2e807cc24f18c5af3b931566fdca556b5957ed Mon Sep 17 00:00:00 2001
From: Tom Breloff <tom@breloff.com>
Date: Tue, 15 Nov 2016 17:05:26 -0500
Subject: [PATCH] isnothing

---
 src/utils.jl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/utils.jl b/src/utils.jl
index afb9a52f..c6246837 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -234,6 +234,9 @@ end
 nop() = nothing
 notimpl() = error("This has not been implemented yet")
 
+isnothing(x::Void) = true
+isnothing(x) = false
+
 cycle(wrapper::InputWrapper, idx::Int) = wrapper.obj
 cycle(wrapper::InputWrapper, idx::AVec{Int}) = wrapper.obj