From 480c5a2994d5ccfa3542cb85c1355ad4efbb1e5e Mon Sep 17 00:00:00 2001
From: Yichao Yu <yyc1992@gmail.com>
Date: Fri, 10 Feb 2017 21:38:04 -0500
Subject: [PATCH] Fix 0.6 abstract type declaration depwarn

[ci skip]
---
 REQUIRE         |  2 +-
 src/Calculus.jl | 16 ++++++++--------
 src/symbolic.jl |  4 ++--
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/REQUIRE b/REQUIRE
index a9ddc7e..c7eded8 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,2 +1,2 @@
 julia 0.4
-Compat 0.9.1
+Compat 0.17.0
diff --git a/src/Calculus.jl b/src/Calculus.jl
index 33e3450..2bf5f7a 100644
--- a/src/Calculus.jl
+++ b/src/Calculus.jl
@@ -15,14 +15,14 @@ module Calculus
            second_derivative
 
     # TODO: Debate type system more carefully
-    # abstract BundledFunction
-    # abstract ScalarFunction
-    # abstract VectorFunction
-    # abstract ForwardDifference
-    # abstract CentralDifference
-    # abstract ComplexDifference
-    # abstract GradientEstimator
-    # abstract HessianEstimator
+    # abstract type BundledFunction end
+    # abstract type ScalarFunction end
+    # abstract type VectorFunction end
+    # abstract type ForwardDifference end
+    # abstract type CentralDifference end
+    # abstract type ComplexDifference end
+    # abstract type GradientEstimator end
+    # abstract type HessianEstimator end
 
     # typealias NonDifferentiableFunction Function
     # type DifferentiableFunction
diff --git a/src/symbolic.jl b/src/symbolic.jl
index 55f6463..a21b19a 100644
--- a/src/symbolic.jl
+++ b/src/symbolic.jl
@@ -12,8 +12,8 @@ import Base.show, Base.(==)
 #
 #################################################################
 
-abstract Symbolic
-abstract AbstractVariable <: Symbolic
+Compat.@compat abstract type Symbolic end
+Compat.@compat abstract type AbstractVariable <: Symbolic end
 Compat.@compat typealias SymbolicVariable Union{Symbol, AbstractVariable}