Fix ExpWeight constructor (#92)

Author: jishnub

Project.toml

@@ -1,6 +1,6 @@
 name = "ApproxFunSingularities"
 uuid = "f8fcb915-6b99-5be2-b79a-d6dbef8e6e7e"
-version = "0.3.17"
+version = "0.3.18"
 
 [deps]
 ApproxFunBase = "fbd15aa5-315a-5a7d-a8a4-24992e37be05"

src/ExpWeight.jl

@@ -7,7 +7,7 @@ end
 
 function ExpWeight(q,sp)
     @assert domain(q) == domain(sp)
-    ExpWeight{typeof(sp),typeof(q),domaintype(q),rangetype(q)}(q,sp)
+    ExpWeight{typeof(sp),typeof(q),domaintype(space(q)),rangetype(space(q))}(q,sp)
 end
 
 weight(sp::ExpWeight,x) = exp(sp.exponent(x))

test/runtests.jl

@@ -359,6 +359,14 @@ end
     end
 end
 
+@testset "ExpWeight" begin
+    S = ExpWeight(-Fun()^2, Chebyshev())
+    x = 0.5
+    n = 2
+    @test S(n, x) ≈ exp(-x^2) * Chebyshev()(n, x)
+    @test S(n)'(x) ≈ exp(-x^2) * Chebyshev()(n)'(x) - 2x * exp(-x^2) * Chebyshev()(n, x)
+end
+
 @testset "DiracDelta and PointSpace" begin
     a,b=DiracDelta(0.),DiracDelta(1.)
     f=Fun(exp)