Preserve types in triangular constructors

Author: jishnub

Project.toml

@@ -1,6 +1,6 @@
 name = "ToeplitzMatrices"
 uuid = "c751599d-da0a-543b-9d20-d0a503d91d24"
-version = "0.8.3"
+version = "0.9.0"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"
@@ -25,7 +25,7 @@ LinearAlgebra = "<0.0.1, 1"
 Random = "<0.0.1, 1"
 StatsBase = "0.32, 0.33, 0.34"
 Test = "<0.0.1, 1"
-julia = "1.0"
+julia = "1.6"
 
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"

src/special.jl

@@ -192,11 +192,9 @@ function LowerTriangularToeplitz{T}(A::AbstractMatrix) where T
     checksquare(A)
     LowerTriangularToeplitz{T}(_vc(A))
 end
-_toeplitztype(s::Symbol) = Symbol(s,"Toeplitz")
+_toeplitztype(s::Symbol) = Symbol(s, :Toeplitz)
 for TYPE in (:UpperTriangular, :LowerTriangular)
     @eval begin
-        $TYPE{T}(A::AbstractToeplitz) where T = $(_toeplitztype(TYPE)){T}(A)
-        $TYPE(A::AbstractToeplitz) = $TYPE{eltype(A)}(A)
         convert(::Type{TriangularToeplitz{T}},A::$(_toeplitztype(TYPE))) where T<:Number = convert($(_toeplitztype(TYPE)){T},A)
     end
 end

test/runtests.jl

@@ -614,19 +614,19 @@ end
     A = randn(ComplexF64, 3, 3)
     T = Toeplitz(A)
     TU = UpperTriangular(T)
-    @test TU isa TriangularToeplitz
+    @test TU isa UpperTriangular
     @test istriu(TU)
     @test TU == Toeplitz(triu(A)) == triu(T)
     @test TU'ones(3) == Matrix(TU)'ones(3)
     @test transpose(TU)*ones(3) == transpose(Matrix(TU))*ones(3)
-    @test triu(TU, 1)::TriangularToeplitz == triu(Matrix(T), 1) == triu(T,1)
+    @test triu(TU, 1) == triu(Matrix(T), 1) == triu(T,1)
     TL = LowerTriangular(T)
-    @test TL isa TriangularToeplitz
+    @test TL isa LowerTriangular
     @test istril(TL)
     @test TL == Toeplitz(tril(A)) == tril(T)
     @test TL'ones(3) == Matrix(TL)'ones(3)
     @test transpose(TL)*ones(3) == transpose(Matrix(TL))*ones(3)
-    @test tril(TL, -1)::TriangularToeplitz == tril(Matrix(T), -1) == tril(T,-1)
+    @test tril(TL, -1) == tril(Matrix(T), -1) == tril(T,-1)
     for n in (65, 128)
         A = randn(n, n)
         TU = TriangularToeplitz(A, :U)