Avoid unnecessary conversions of nullable.

JuliaLang · Aug 1, 2015 · a4c0707 · a4c0707
1 parent 3b305b0
commit a4c0707
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/base/nullable.jl b/base/nullable.jl
@@ -8,6 +8,8 @@ Nullable() = Nullable{Union{}}()
 
 eltype{T}(::Type{Nullable{T}}) = T
 
+convert{T}(::Type{Nullable{T}}, x::Nullable{T}) = x
+
 function convert{T}(::Type{Nullable{T}}, x::Nullable)
     return isnull(x) ? Nullable{T}() : Nullable{T}(convert(T, get(x)))
 end