add __sum

Author: jClugstor

src/solve.jl

@@ -469,6 +469,12 @@ struct DualEltypeChecker{T, T2}
     counter::T2
 end
 
+@inline __sum(f::F, args...; init, kwargs...) where {F} = sum(f, args...; init, kwargs...)
+@inline function __sum(
+        f::F, a::StaticArraysCore.StaticArray...; init, kwargs...) where {F}
+    return mapreduce(f, +, a...; init, kwargs...)
+end
+
 totallength(x::Number) = 1
 totallength(x::AbstractArray) = __sum(totallength, x; init = 0)