Merge pull request #38277 from PaulSoderlind/master

added missing trunc methods for Quarter

Author: quinnj

stdlib/Dates/src/adjusters.jl

@@ -2,10 +2,12 @@
 
 ### truncation
 Base.trunc(dt::Date, p::Type{Year}) = Date(UTD(totaldays(year(dt), 1, 1)))
+Base.trunc(dt::Date, p::Type{Quarter}) = firstdayofquarter(dt)
 Base.trunc(dt::Date, p::Type{Month}) = firstdayofmonth(dt)
 Base.trunc(dt::Date, p::Type{Day}) = dt
 
 Base.trunc(dt::DateTime, p::Type{Year}) = DateTime(trunc(Date(dt), Year))
+Base.trunc(dt::DateTime, p::Type{Quarter}) = DateTime(trunc(Date(dt), Quarter))
 Base.trunc(dt::DateTime, p::Type{Month}) = DateTime(trunc(Date(dt), Month))
 Base.trunc(dt::DateTime, p::Type{Day}) = DateTime(Date(dt))
 Base.trunc(dt::DateTime, p::Type{Hour}) = dt - Minute(dt) - Second(dt) - Millisecond(dt)

stdlib/Dates/test/adjusters.jl

@@ -8,10 +8,12 @@ using Dates
 @testset "trunc" begin
     dt = Dates.Date(2012, 12, 21)
     @test trunc(dt, Dates.Year) == Dates.Date(2012)
+    @test trunc(dt, Dates.Quarter) == Dates.Date(2012, 10)
     @test trunc(dt, Dates.Month) == Dates.Date(2012, 12)
     @test trunc(dt, Dates.Day) == Dates.Date(2012, 12, 21)
     dt = Dates.DateTime(2012, 12, 21, 16, 30, 20, 200)
     @test trunc(dt, Dates.Year) == Dates.DateTime(2012)
+    @test trunc(dt, Dates.Quarter) == Dates.DateTime(2012, 10)
     @test trunc(dt, Dates.Month) == Dates.DateTime(2012, 12)
     @test trunc(dt, Dates.Day) == Dates.DateTime(2012, 12, 21)
     @test trunc(dt, Dates.Hour) == Dates.DateTime(2012, 12, 21, 16)