Merge pull request #74 from JuliaMath/teh/amb

Fix an ambiguity on julia 0.6

Author: vchuravy

src/normed.jl

@@ -36,7 +36,7 @@ zero(x::Normed) = zero(typeof(x))
 rawone(v) = reinterpret(one(v))
 
 # Conversions
-convert{T<:Normed}(::Type{T}, x::T) = x
+convert{T<:Unsigned,f}(::Type{Normed{T,f}}, x::Normed{T,f}) = x
 convert{T1<:Unsigned,T2<:Unsigned,f}(::Type{Normed{T1,f}}, x::Normed{T2,f}) = Normed{T1,f}(convert(T1, x.i), 0)
 function convert{T<:Unsigned,T2<:Unsigned,f}(::Type{Normed{T,f}}, x::Normed{T2})
     U = Normed{T,f}
@@ -45,7 +45,6 @@ function convert{T<:Unsigned,T2<:Unsigned,f}(::Type{Normed{T,f}}, x::Normed{T2})
     reinterpret(U, _unsafe_trunc(T, y))
 end
 convert{U<:Normed}(::Type{U}, x::Real) = _convert(U, rawtype(U), x)
-convert{T1,T2,f}(::Type{Normed{T1,f}}, x::Normed{T2,f}) = Normed{T1,f}(convert(T1, x.i), 0)
 
 convert(::Type{N0f16}, x::N0f8) = reinterpret(N0f16, convert(UInt16, 0x0101*reinterpret(x)))
 function _convert{U<:Normed,T}(::Type{U}, ::Type{T}, x)

test/normed.jl

@@ -65,6 +65,7 @@ end
 @test_throws ArgumentError convert(Normed{UInt128,100}, 10.0^9)
 
 x = N0f8(0.5)
+@test convert(N0f8, x) === x
 @test isfinite(x) == true
 @test isnan(x) == false
 @test isinf(x) == false