Add missing support for addition and subtraction

Inspired by the discussion in JuliaLang#28570
nilshg · Aug 26, 2020 · 5416a09 · 5416a09
1 parent 8a01917
commit 5416a09
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/stdlib/Dates/src/arithmetic.jl b/stdlib/Dates/src/arithmetic.jl
@@ -84,6 +84,12 @@ end
 (-)(x::Time, y::TimePeriod) = return Time(Nanosecond(value(x) - tons(y)))
 (+)(y::Period, x::TimeType) = x + y
 
+# Missing support
+(+)(x::T, y::Missing) where {T<:AbstractTime} = missing
+(+)(x::Missing, y::T) where {T<:AbstractTime} = missing
+(-)(x::T, y::Missing) where {T<:AbstractTime} = missing
+(-)(x::Missing, y::T) where {T<:AbstractTime} = missing
+
 # AbstractArray{TimeType}, AbstractArray{TimeType}
 (-)(x::OrdinalRange{T}, y::OrdinalRange{T}) where {T<:TimeType} = Vector(x) - Vector(y)
 (-)(x::AbstractRange{T}, y::AbstractRange{T}) where {T<:TimeType} = Vector(x) - Vector(y)