fix hash of negative enums

Author: jw3126

Project.toml

@@ -1,7 +1,7 @@
 name = "StructHelpers"
 uuid = "4093c41a-2008-41fd-82b8-e3f9d02b504f"
 authors = ["Jan Weidner <jw3126@gmail.com> and contributors"]
-version = "1.3.0"
+version = "1.3.1"
 
 [deps]
 ConstructionBase = "187b0558-2788-49d3-abe0-74a17ed4e7c9"

src/StructHelpers.jl

@@ -461,7 +461,7 @@ macro enumbatteries(T, kw...)
     if nt.hash
         def = :(function Base.hash(o::$T, h::UInt)
             h = ($start_hash)(o, h, $(nt.typesalt))
-            Base.hash(UInt(o), h)
+            Base.hash(Integer(o), h)
         end
         )
         push!(ret.args, def)

test/runtests.jl

@@ -174,6 +174,9 @@ end
     @test_throws Exception convert(Shape, "Circle")
 end
 
+@enum Negative MinusOne=-1 MinusTwo=-2 MinusThree=-3
+@enumbatteries Negative typesalt = 0xd11b6121f2b8cd22
+
 @testset "@enumbatteries hash" begin
     # hash with typesalt
     @test hash(Circle) == hash(7, hash(0x0578044908fb9846))
@@ -186,6 +189,11 @@ end
 
     # no hash by default
     @test hash(Red) != hash(0, hash(Color))
+
+    h = 0xed315b93bf264f3e
+    typesalt = 0xd11b6121f2b8cd22
+    @test hash(MinusOne, h) == hash(-1, hash(typesalt, h))
+    @test hash(MinusTwo, h) == hash(-2, hash(typesalt, h))
 end
 
 struct Bad end