Moved Base.exp, Base.cos, and Base.sin definitions to Furlongs module

Author: stemann

test/DerivativeTest.jl

@@ -135,10 +135,6 @@ end
 end
 
 @testset "non-standard numbers" begin
-    Base.exp(f::Furlongs.Furlong{0}) = exp(f.val)
-    Base.cos(f::Furlongs.Furlong{0}) = cos(f.val)
-    Base.sin(f::Furlongs.Furlong{0}) = sin(f.val)
-
     furlong = Furlongs.Furlong{2}(1.0)
 
     f(x) = exp(x) + 4*sin(x)*oneunit(x)

test/Furlongs.jl

@@ -107,4 +107,8 @@ Base.muladd(x::TNumber, y::TNumber, z::Furlong) = x*y + z
 Base.muladd(x::TNumber, y::Furlong, z::Furlong) = x*y + z
 Base.muladd(x::Furlong, y::TNumber, z::Furlong) = x*y + z
 
+Base.exp(f::Furlongs.Furlong{0}) = exp(f.val)
+Base.cos(f::Furlongs.Furlong{0}) = cos(f.val)
+Base.sin(f::Furlongs.Furlong{0}) = sin(f.val)
+
 end