[Dates] Define a method for (:)(a::Date, b::Date) with default step

pcjentsch · Jun 26, 2022 · 5380495 · 5380495
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diff --git a/stdlib/Dates/src/ranges.jl b/stdlib/Dates/src/ranges.jl
@@ -4,6 +4,7 @@
 
 StepRange{<:Dates.DatePeriod,<:Real}(start, step, stop) =
  throw(ArgumentError("must specify step as a Period when constructing Dates ranges"))
+Base.:(:)(a::T, b::T) where {T<:Date} = (:)(a, Day(1), b)
 
 # Given a start and end date, how many steps/periods are in between
 guess(a::DateTime, b::DateTime, c) = floor(Int64, (Int128(value(b)) - Int128(value(a))) / toms(c))

diff --git a/stdlib/Dates/test/ranges.jl b/stdlib/Dates/test/ranges.jl
@@ -596,4 +596,11 @@ a = Dates.Time(23, 1, 1)
  @test length(utm_typemin:-Millisecond(1):utm_typemin) == 1
 end
 
+# Issue #45816
+@testset "default step for date ranges" begin
+ r = Date(2000, 1, 1):Date(2000, 12, 31)
+ @test step(r) === Day(1)
+ @test length(r) == 366
+end
+
 end # RangesTest module