simple sortperm

Author: mcabbott

src/sorting.jl

@@ -543,3 +543,9 @@ end
 function Base.partialsort(c::AnyCuArray, k::Union{Integer, OrdinalRange}; kwargs...)
     return partialsort!(copy(c), k; kwargs...)
 end
+
+function Base.sortperm(c::AnyCuVector; by=identity, kw...)
+    tups = tuple.(c, eachindex(c))
+    sort!(tups, by=by∘first, kw...)
+    return last.(tups)
+end