Merge pull request #108 from jverzani/eltype

Eltype,

Author: jverzani

src/Polynomials.jl

@@ -59,7 +59,7 @@ p + q                  # ERROR: Polynomials must have same variable.
 immutable Poly{T}
   a::Vector{T}
   var::Symbol
-  @compat function (::Type{Poly}){T<:Number}(a::Vector{T}, var::SymbolLike = :x)
+  @compat function (::Type{Poly}){T<:Number}(a::AbstractVector{T}, var::SymbolLike = :x)
     # if a == [] we replace it with a = [0]
     if length(a) == 0
       return new{T}(zeros(T,1), @compat Symbol(var))
@@ -72,7 +72,7 @@ immutable Poly{T}
 end
 
 Poly(n::Number, var::SymbolLike = :x) = Poly([n], var)
-@compat (::Type{Poly{T}}){T,S}(x::Vector{S}, var::SymbolLike = :x) =
+@compat (::Type{Poly{T}}){T,S}(x::AbstractVector{S}, var::SymbolLike = :x) =
   Poly(convert(Vector{T}, x), var)
 
 # create a Poly object from its roots
@@ -110,7 +110,7 @@ convert{T, S<:Number}(::Type{Poly{T}}, x::S, var::SymbolLike=:x) = Poly(T[x], va
 convert{T, S<:Number}(::Type{Poly{T}}, x::AbstractArray{S}, var::SymbolLike=:x) = map(el->Poly(T[el],var), x)
 promote_rule{T, S}(::Type{Poly{T}}, ::Type{Poly{S}}) = Poly{promote_type(T, S)}
 promote_rule{T, S<:Number}(::Type{Poly{T}}, ::Type{S}) = Poly{promote_type(T, S)}
-eltype{T}(::Poly{T}) = T
+eltype{T}(::Poly{T}) = Poly{T}
 
 """
 

test/runtests.jl

@@ -324,3 +324,4 @@ for term in p1
 end
 
 @test eltype(typeof(p1)) == typeof(p1)
+@test length(collect(p1)) == degree(p1)+1