From 2d8c0f9160812dba14c08b3602d907f561e843fe Mon Sep 17 00:00:00 2001
From: Fredrik Ekre <fredrik.ekre@chalmers.se>
Date: Thu, 8 Jun 2017 22:32:57 +0200
Subject: [PATCH] add a missing method for transpose(A::Hermitian{<:Real})
 (#22280)

---
 base/linalg/symmetric.jl |  1 +
 test/linalg/symmetric.jl | 16 +++++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/base/linalg/symmetric.jl b/base/linalg/symmetric.jl
index a3c2aa39c435e..9dc5bc9a083a0 100644
--- a/base/linalg/symmetric.jl
+++ b/base/linalg/symmetric.jl
@@ -210,6 +210,7 @@ issymmetric(A::Hermitian{<:Real}) = true
 issymmetric(A::Hermitian{<:Complex}) = isreal(A)
 issymmetric(A::Symmetric) = true
 transpose(A::Symmetric) = A
+transpose(A::Hermitian{<:Real}) = A
 ctranspose(A::Symmetric{<:Real}) = A
 function ctranspose(A::Symmetric)
     AC = ctranspose(A.data)
diff --git a/test/linalg/symmetric.jl b/test/linalg/symmetric.jl
index 17e457d8c1082..3d686a037d09f 100644
--- a/test/linalg/symmetric.jl
+++ b/test/linalg/symmetric.jl
@@ -93,14 +93,20 @@ let n=10
             @test ishermitian(Symmetric(b + b'))
         end
 
-        #transpose, ctranspose
+        # transpose, ctranspose
+        S = Symmetric(asym)
+        H = Hermitian(asym)
         if eltya <: Real
-            @test transpose(Symmetric(asym)) == asym
+            @test  transpose(S) === S == asym
+            @test ctranspose(S) === S == asym
+            @test  transpose(H) === H == asym
+            @test ctranspose(H) === H == asym
         else
-            @test transpose(Hermitian(asym)) == transpose(asym)
+            @test  transpose(S) === S
+            @test ctranspose(S) ==  Symmetric(conj(asym))
+            @test  transpose(H) ==  Hermitian(transpose(asym))
+            @test ctranspose(H) === H == asym
         end
-        @test ctranspose(Symmetric(asym)) == Symmetric(conj(asym))
-        @test ctranspose(Hermitian(asym)) == asym
 
         #tril/triu
         for di in -n:n