add isstrictlyconvex

src/LearnBase.jl

@@ -79,18 +79,24 @@ function isminimizable end
 function isdifferentiable end
 function istwicedifferentiable end
 function isconvex end
+function isstrictlyconvex end
 function isstronglyconvex end
 function isnemitski end
 function isunivfishercons end
 function isfishercons end
 function islipschitzcont end
 function islocallylipschitzcont end
-function islipschitzcont_deriv end
+function islipschitzcont_deriv end # maybe overkill
 function isclipable end
 function ismarginbased end
 function isclasscalibrated end
 function isdistancebased end
 
+# fallback to supersets
+isstrictlyconvex(any) = isstronglyconvex(any)
+isconvex(any) = isstrictlyconvex(any)
+islocallylipschitzcont(any) = islipschitzcont(any)
+
 """
 Anything that takes an input and performs some kind
 of function to produce an output. For example a linear
@@ -250,6 +256,7 @@ export
     isdifferentiable,
     istwicedifferentiable,
     isconvex,
+    isstrictlyconvex,
     isstronglyconvex,
     isnemitski,
     isunivfishercons,

test/runtests.jl

@@ -46,6 +46,7 @@ using Base.Test
 @test typeof(isdifferentiable) <: Function
 @test typeof(istwicedifferentiable) <: Function
 @test typeof(isconvex) <: Function
+@test typeof(isstrictlyconvex) <: Function
 @test typeof(isstronglyconvex) <: Function
 @test typeof(isnemitski) <: Function
 @test typeof(isunivfishercons) <: Function
@@ -70,6 +71,16 @@ using StatsBase
 @test StatsBase.fit! == LearnBase.fit!
 @test StatsBase.nobs == LearnBase.nobs
 
+# Test superset fallbacks
+immutable MyStronglyConvexType end
+LearnBase.isstronglyconvex(::MyStronglyConvexType) = true
+LearnBase.islipschitzcont(::MyStronglyConvexType) = true
+@test isstronglyconvex(MyStronglyConvexType())
+@test isstrictlyconvex(MyStronglyConvexType())
+@test isconvex(MyStronglyConvexType())
+@test islipschitzcont(MyStronglyConvexType())
+@test islocallylipschitzcont(MyStronglyConvexType())
+
 # IntervalSet
 let s = IntervalSet(-1,1)
     @test typeof(s) == IntervalSet{Int}
@@ -100,7 +111,7 @@ let s = IntervalSet(-1,1.0)
     @test 1 in s
     # @show s LearnBase.randtype(s)
 end
- 
+
 # DiscreteSet
 let s = DiscreteSet([-1,1])
     @test typeof(s) == DiscreteSet{Vector{Int}}