Merge pull request #1359 from JuliaStats/dw/fix_poisson

Fix #1358
JuliaStats · Jul 5, 2021 · 43cd959 · 43cd959 · devmotion · Jul 5, 2021
2 parents 34df63d + be7e632
commit 43cd959
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diff --git a/Project.toml b/Project.toml
@@ -1,7 +1,7 @@
 name = "Distributions"
 uuid = "31c24e10-a181-5473-b8eb-7969acd0382f"
 authors = ["JuliaStats"]
-version = "0.25.8"
+version = "0.25.9"
 
 [deps]
 FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"

diff --git a/src/univariates.jl b/src/univariates.jl
@@ -646,7 +646,7 @@ macro _delegate_statsfuns(D, fpre, psyms...)
     pargs = [Expr(:(.), :d, Expr(:quote, s)) for s in psyms]
 
     # output type of `quantile` etc.
-    T = :($D isa DiscreteUnivariateDistribution ? Int : Real)
+    T = :($D <: DiscreteUnivariateDistribution ? Int : Real)
 
     return quote
         $Distributions.pdf(d::$D, x::Real) = $(fpdf)($(pargs...), x)

diff --git a/test/univariates.jl b/test/univariates.jl
@@ -166,3 +166,12 @@ for c in ["discrete",
     verify_and_test_drive(jsonfile, ARGS, 10^6)
     println()
 end
+
+# #1358
+@testset "Poisson quantile" begin
+    d = Poisson(1)
+    @test quantile(d, 0.2) isa Int
+    @test cquantile(d, 0.4) isa Int
+    @test invlogcdf(d, log(0.2)) isa Int
+    @test invlogccdf(d, log(0.6)) isa Int
+end