try harder to avoid ambiguities

Author: alyst

src/dual.jl

@@ -806,17 +806,16 @@ function _map_dual_components(fvalue!, fpartial!, x::AbstractArray{DT}) where DT
     return res
 end
 
-Base.:\(m::Union{LowerTriangular{<:LinearAlgebra.BlasFloat},
-                 UpperTriangular{<:LinearAlgebra.BlasFloat},
-                 StridedMatrix{<:LinearAlgebra.BlasFloat}},
-        x::StridedVecOrMat{<:Dual}) =
-    _map_dual_components(Base.Fix1(ldiv!, m), (x, _) -> ldiv!(m, x), x)
-
-Base.:*(m::Union{LowerTriangular{<:LinearAlgebra.BlasFloat},
-                 UpperTriangular{<:LinearAlgebra.BlasFloat},
-                 StridedMatrix{<:LinearAlgebra.BlasFloat}},
-        x::StridedVecOrMat{<:Dual}) =
-    _map_dual_components(Base.Fix1(lmul!, m), (x, _) -> lmul!(m, x), x)
+for MT in (StridedMatrix{<:LinearAlgebra.BlasFloat},
+           LowerTriangular{<:LinearAlgebra.BlasFloat},
+           UpperTriangular{<:LinearAlgebra.BlasFloat}),
+    XT in (StridedMatrix{<:Dual}, StridedVector{<:Dual})
+    @eval Base.:\(m::$MT, x::$XT) =
+        _map_dual_components(Base.Fix1(ldiv!, m), (x, _) -> ldiv!(m, x), x)
+
+    @eval Base.:*(m::$MT, x::$XT) =
+        _map_dual_components(Base.Fix1(lmul!, m), (x, _) -> lmul!(m, x), x)
+end
 
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