inference in TimesOperator adjoint/transpose (#160)

Author: jishnub

Project.toml

@@ -1,6 +1,6 @@
 name = "ApproxFunBase"
 uuid = "fbd15aa5-315a-5a7d-a8a4-24992e37be05"
-version = "0.6.9"
+version = "0.6.10"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"

src/Operators/general/algebra.jl

@@ -479,7 +479,9 @@ end
 
 
 for OP in (:(adjoint),:(transpose))
-    @eval $OP(A::TimesOperator)=TimesOperator(reverse!(map($OP,A.ops)))
+    @eval $OP(A::TimesOperator) = TimesOperator(
+        convert(Vector{Operator{eltype(A)}}, reverse!(map($OP,A.ops)))::Vector{Operator{eltype(A)}},
+        reverse(bandwidths(A)))
 end
 
 function *(A::Operator,B::Operator)

test/runtests.jl

@@ -160,6 +160,7 @@ end
             @test MT == M * T
             @test T * M == M * T == M * M * M
             @test TT == T * T == M * M * M * M
+            @test (@inferred adjoint(T)) == adjoint(M) * adjoint(M)
         end
         @testset "plus operator" begin
             c = [1,2,3]