Add TaylorN constructor (#355)

* Add TaylorN constructor

* Bump patch version

* Remove some tests added by mistake

* Add test suggested by @lbenet

Author: PerezHz

Project.toml

@@ -1,7 +1,7 @@
 name = "TaylorSeries"
 uuid = "6aa5eb33-94cf-58f4-a9d0-e4b2c4fc25ea"
 repo = "https://github.com/JuliaDiff/TaylorSeries.jl.git"
-version = "0.17.4"
+version = "0.17.5"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"

src/constructors.jl

@@ -211,5 +211,6 @@ const NumberNotSeries = Union{Real,Complex}
 # A `Number` which is not `TaylorN` nor a `HomogeneousPolynomial`
 const NumberNotSeriesN = Union{Real,Complex,Taylor1}
 
-## Additional Taylor1 outer constructor ##
+## Additional Taylor1 and TaylorN outer constructor ##
 Taylor1{T}(x::S) where {T<:Number,S<:NumberNotSeries} = Taylor1([convert(T,x)], 0)
+TaylorN{T}(x::S) where {T<:Number,S<:NumberNotSeries} = TaylorN(convert(T, x), TaylorSeries.get_order())

test/manyvariables.jl

@@ -6,6 +6,12 @@ using Test
 # using LinearAlgebra
 
 @testset "Test hash tables" begin
+    a = TaylorN{Float64}(9//10)
+    a isa TaylorN{Float64}
+    @test constant_term(a) == Float64(9//10)
+    b = TaylorN{Complex{Float64}}(-4//7im)
+    @test b isa TaylorN{Complex{Float64}}
+    @test_throws MethodError TaylorN(-4//7im)
     # Issue #85 is solved!
     set_variables("x", numvars=66, order=1)
     @test TS._params_TaylorN_.order == get_order() == 1
@@ -791,6 +797,7 @@ end
         @test float(HomogeneousPolynomial{Complex{Int}}) == float(HomogeneousPolynomial{Complex{Float64}})
         @test float(TaylorN{Complex{Rational}}) == float(TaylorN{Complex{Float64}})
     end
+
 end
 
 @testset "Integrate for several variables" begin