From 07a2d36c25dcb5b9c06ab185fbf4676cb8fc53df Mon Sep 17 00:00:00 2001
From: David Nadlinger <code@klickverbot.at>
Date: Fri, 14 Sep 2018 19:35:59 +0100
Subject: [PATCH] Define ' on Operator as dagger (#235)

---
 src/operators.jl             | 1 +
 test/test_operators.jl       | 1 +
 test/test_operators_dense.jl | 4 ++++
 3 files changed, 6 insertions(+)

diff --git a/src/operators.jl b/src/operators.jl
index 7825b22e..c0c1a309 100644
--- a/src/operators.jl
+++ b/src/operators.jl
@@ -50,6 +50,7 @@ basis(a::Operator) = (check_samebases(a); a.basis_l)
 
 
 dagger(a::Operator) = arithmetic_unary_error("Hermitian conjugate", a)
+Base.adjoint(a::Operator) = dagger(a)
 
 conj(a::Operator) = arithmetic_unary_error("Complex conjugate", a)
 conj!(a::Operator) = conj(a::Operator)
diff --git a/test/test_operators.jl b/test/test_operators.jl
index 6cfe14c7..586f815b 100644
--- a/test/test_operators.jl
+++ b/test/test_operators.jl
@@ -36,6 +36,7 @@ op_test3 = test_operators(b1 ⊗ b2, b2 ⊗ b1, randoperator(b, b).data)
 @test_throws ArgumentError op_test - 1
 
 @test_throws ArgumentError dagger(op_test)
+@test_throws ArgumentError op_test'
 @test_throws ArgumentError identityoperator(test_operators, b, b)
 @test_throws ArgumentError tr(op_test)
 @test_throws ArgumentError ptrace(op_test, [1])
diff --git a/test/test_operators_dense.jl b/test/test_operators_dense.jl
index 2cda56fa..4cd5e3c0 100644
--- a/test/test_operators_dense.jl
+++ b/test/test_operators_dense.jl
@@ -26,6 +26,9 @@ op1 = DenseOperator(b1a, b1b, [1 1 1; 1 1 1])
 op2 = DenseOperator(b1b, b1a, [1 1; 1 1; 1 1])
 @test op1 == dagger(op2)
 
+# Test ' shorthand
+@test dagger(op2) == op2'
+
 # Test copy
 op1 = randoperator(b1a)
 op2 = copy(op1)
@@ -120,6 +123,7 @@ op123 = op1a ⊗ op2a ⊗ op3a
 
 # Transpose
 @test 1e-13 > D(dagger(op1a ⊗ op2a), dagger(op1a) ⊗ dagger(op2a))
+@test 1e-13 > D(dagger(op1a ⊗ op2a), dagger(op1a) ⊗ dagger(op2a))
 
 # Internal layout
 a = Ket(b1a, rand(ComplexF64, length(b1a)))