Move Statistics to an extension

Author: jishnub

Project.toml

@@ -22,13 +22,14 @@ LowRankMatrices = "e65ccdef-c354-471a-8090-89bec1c20ec3"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
-Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [weakdeps]
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
+Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [extensions]
 ApproxFunBaseSpecialFunctionsExt = "SpecialFunctions"
+ApproxFunBaseStatisticsExt = "Statistics"
 
 [compat]
 AbstractFFTs = "0.5, 1"

ext/ApproxFunBaseStatisticsExt.jl

@@ -0,0 +1,9 @@
+module ApproxFunBaseStatisticsExt
+
+import ApproxFunBase
+using ApproxFunBase: IntervalOrSegment
+import Statistics: mean
+
+mean(d::IntervalOrSegment) = ApproxFunBase.mean(d)
+
+end

src/ApproxFunBase.jl

@@ -16,9 +16,7 @@ using IntervalSets
 using LinearAlgebra
 using LowRankMatrices
 using SparseArrays
-# using SpecialFunctions
 using StaticArrays: SVector, @SArray, SArray
-import Statistics: mean
 
 import DomainSets: Domain, indomain, UnionDomain, ProductDomain, Point, ∂,
               SetdiffDomain, Interval, ChebyshevInterval, boundary,

test/runtests.jl

@@ -789,3 +789,8 @@ include("show.jl")
 
     @test @inferred(chebyshev_clenshaw(BigInt[1], 1)) == 1
 end
+
+@testset "Statistics" begin
+    @test mean(Segment(1,3)) == 2
+    @test mean(1..3) == 2
+end