Make more versatile get_variables (#166)

src/parameters.jl

@@ -48,15 +48,18 @@ function set_variable_names(varnames::Vector{T}) where {T<:AbstractString}
     nothing
 end
 """
-    get_variables(;order=get_order())
+    get_variables(T::Type, [order::Int=get_order()])
 
-Return a `TaylorN` vector with each entry representing an
+Return a `TaylorN{T}` vector with each entry representing an
 independent variable. It takes the default `_params_TaylorN_` values
 if `set_variables` hasn't been changed with the exception that `order`
 can be explicitely established by the user without changing internal values
-for `num_vars` or `variable_names`.
+for `num_vars` or `variable_names`. Ommiting `T` defaults to `Float64`.
 """
-get_variables(;order::Integer=get_order()) = [TaylorN(i,order=order) for i in 1:get_numvars()]
+get_variables(T::Type, order::Int=get_order()) =
+    [TaylorN(T, i, order=order) for i in 1:get_numvars()]
+get_variables(order::Int=get_order()) =
+    [TaylorN(Float64, i, order=order) for i in 1:get_numvars()]
 
 """
     set_variables([T::Type], names::String; [order=get_order(), numvars=-1])

test/manyvariables.jl

@@ -44,8 +44,10 @@ end
     @test get_numvars() == 2
 
     @test get_variables()[1].order == get_order()
-    @test get_variables(order=2)[1].order == 2
-    @test get_variables(order=3)[1] == TaylorN(1,order=3)
+    @test get_variables(2)[1].order == 2
+    @test get_variables(3)[1] == TaylorN(1, order=3)
+    @test get_variables(Int, 3)[1] == TaylorN(Int, 1, order=3)
+    @test length(get_variables()) == get_numvars()
 
     x, y = set_variables("x y", order=6)
     @test x.order == 6