Make it possible to control the visibility of created enums.

[maleadt]

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diff --git a/src/enum.jl b/src/enum.jl
index 4f3b93a..7470c1f 100644
--- a/src/enum.jl
+++ b/src/enum.jl
@@ -7,8 +7,8 @@ export @enum_without_prefix
 # lack of namespacing in C, are to be used in Julia where we do have module namespacing.
 macro enum_without_prefix(ex...)
     # destructure keyword arguments
-    call = ex[end-1:end]
-    kwargs = map(ex[1:end-2]) do kwarg
+    call = ex[(end - 1):end]
+    kwargs = map(ex[1:(end - 2)]) do kwarg
         if kwarg isa Symbol
             :($kwarg = $kwarg)
         elseif Meta.isexpr(kwarg, :(=))
@@ -45,7 +45,7 @@ macro enum_without_prefix(ex...)
     for instance in instances(enum)
         name = String(Symbol(instance))
         @assert startswith(name, prefix)
-        short = Symbol(name[length(prefix)+1:end])
+        short = Symbol(name[(length(prefix) + 1):end])
         push!(ex.args, :(const $short = $(mod).$(Symbol(name))))
         if visibility == :export
             push!(ex.args, :(export $short))
diff --git a/test/runtests.jl b/test/runtests.jl
index fa2669b..9010233 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -89,9 +89,9 @@ using IOCapture
 
         # test with visibility=:export
         mod_export = @eval module $(gensym())
-            using GPUToolbox
-            @enum MY_ENUM MY_ENUM_A MY_ENUM_B
-            @enum_without_prefix visibility=:export MY_ENUM MY_ENUM_
+        using GPUToolbox
+        @enum MY_ENUM MY_ENUM_A MY_ENUM_B
+        @enum_without_prefix visibility = :export MY_ENUM MY_ENUM_
         end
         @test mod_export.A == mod_export.MY_ENUM_A
         @test mod_export.B == mod_export.MY_ENUM_B
@@ -102,9 +102,9 @@ using IOCapture
         # test with visibility=:public
         @static if VERSION >= v"1.11"
             mod_public = @eval module $(gensym())
-                using GPUToolbox
-                @enum MY_ENUM MY_ENUM_P MY_ENUM_Q
-                @enum_without_prefix visibility=:public MY_ENUM MY_ENUM_
+            using GPUToolbox
+            @enum MY_ENUM MY_ENUM_P MY_ENUM_Q
+            @enum_without_prefix visibility = :public MY_ENUM MY_ENUM_
             end
             @test mod_public.P == mod_public.MY_ENUM_P
             @test mod_public.Q == mod_public.MY_ENUM_Q