Force more inlining of reduce (#987)

* Force more inlining in `reduce`

* bump version

Author: mateuszbaran

Project.toml

@@ -1,6 +1,6 @@
 name = "StaticArrays"
 uuid = "90137ffa-7385-5640-81b9-e52037218182"
-version = "1.3.1"
+version = "1.3.2"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"

src/mapreduce.jl

@@ -192,7 +192,7 @@ end
 ## reduce ##
 ############
 
-@inline reduce(op, a::StaticArray; dims = :, init = _InitialValue()) =
+@inline reduce(op::R, a::StaticArray; dims = :, init = _InitialValue()) where {R} =
     _reduce(op, a, dims, init)
 
 # disambiguation
@@ -206,7 +206,7 @@ reduce(::typeof(hcat), A::StaticArray{<:Tuple,<:AbstractVecOrMat}) =
 reduce(::typeof(hcat), A::StaticArray{<:Tuple,<:StaticVecOrMatLike}) =
     _reduce(hcat, A, :, _InitialValue())
 
-@inline _reduce(op, a::StaticArray, dims, init = _InitialValue()) =
+@inline _reduce(op::R, a::StaticArray, dims, init = _InitialValue()) where {R} =
     _mapreduce(identity, op, dims, init, Size(a), a)
 
 ################