Fix ambiguities and enable tests for ambiguities

Author: andreasnoack

src/fixed.jl

@@ -7,6 +7,9 @@ struct Fixed{T <: Signed,f} <: FixedPoint{T,  f}
     Fixed{T, f}(i::Integer, _) where {T,f} = new{T, f}(i % T)
     Fixed{T, f}(x) where {T,f} = convert(Fixed{T,f}, x)
     Fixed{T, f}(x::Fixed{T,f}) where {T,f} = x
+    Fixed{T, f}(x::Char) where {T,f} = throw(ArgumentError("Fixed cannot be constructed from a Char"))
+    Fixed{T, f}(x::Complex) where {T,f} = Fixed{T, f}(real(x))
+    Fixed{T, f}(x::Base.TwicePrecision) where {T,f,S} = Fixed{T, f}(convert(Float64, x))
 end
 
 reinterpret(::Type{Fixed{T,f}}, x::T) where {T <: Signed,f} = Fixed{T,f}(x, 0)

src/normed.jl

@@ -7,6 +7,9 @@ struct Normed{T<:Unsigned,f} <: FixedPoint{T,f}
     Normed{T, f}(i::Integer,_) where {T,f} = new{T, f}(i%T)   # for setting by raw representation
     Normed{T, f}(x) where {T,f} = convert(Normed{T,f}, x)
     Normed{T, f}(x::Normed{T,f}) where {T,f} = x
+    Normed{T, f}(x::Char) where {T,f} = throw(ArgumentError("Normed cannot be constructed from a Char"))
+    Normed{T, f}(x::Complex) where {T,f} = Normed{T, f}(real(x))
+    Normed{T, f}(x::Base.TwicePrecision) where {T,f,S} = Normed{T, f}(convert(Float64, x))
 end
 
 typechar(::Type{X}) where {X <: Normed} = 'N'

test/runtests.jl

@@ -1,8 +1,6 @@
 using FixedPointNumbers, Base.Test
 
-if VERSION < v"0.7.0-"
-    @test isempty(detect_ambiguities(FixedPointNumbers, Base, Core))
-end
+@test isempty(detect_ambiguities(FixedPointNumbers, Base, Core))
 
 for f in ["normed.jl", "fixed.jl"]
     println("Testing $f")