real, imag, and tests

Author: ZeppLu

stdlib/LinearAlgebra/src/uniformscaling.jl

@@ -63,6 +63,8 @@ end
 copy(J::UniformScaling) = UniformScaling(J.λ)
 
 conj(J::UniformScaling) = UniformScaling(conj(J.λ))
+real(J::UniformScaling) = UniformScaling(real(J.λ))
+imag(J::UniformScaling) = UniformScaling(imag(J.λ))
 
 transpose(J::UniformScaling) = J
 adjoint(J::UniformScaling) = UniformScaling(conj(J.λ))

stdlib/LinearAlgebra/test/uniformscaling.jl

@@ -146,6 +146,12 @@ let
         @test cond(J) == (λ ≠ zero(λ) ? one(real(λ)) : oftype(real(λ), Inf))
     end
 
+    @testset "real, imag, reim" begin
+        @test real(J) == UniformScaling(real(λ))
+        @test imag(J) == UniformScaling(imag(λ))
+        @test reim(J) == (UniformScaling(real(λ)), UniformScaling(imag(λ)))
+    end
+
     @testset "copyto!" begin
         A = Matrix{Int}(undef, (3,3))
         @test copyto!(A, I) == one(A)