backport zero function from @rafaqz

JuliaGeo · Jan 14, 2025 · b390413 · b390413
1 parent fd805d1
commit b390413
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Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/Project.toml b/Project.toml
@@ -3,7 +3,7 @@ uuid = "179af706-886a-5703-950a-314cd64e0468"
 keywords = ["time", "calendar", "netcdf", "climate and forecast conventions", "oceanography", "meteorology", "climatology", "opendap"]
 license = "MIT"
 desc = "Julia library for decoding time units conforming to the Climate and Forecasting (CF) netCDF conventions"
-version = "0.1.3"
+version = "0.1.4"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"

diff --git a/src/CFTime.jl b/src/CFTime.jl
@@ -223,6 +223,7 @@ pattern given in the `format` string.
         $CFDateTime(dt::AbstractString, format::DateFormat) =
             parse($CFDateTime, dt, format)
 
+        Base.zero(::Type{$CFDateTime}) = Millisecond(0)
     end
 end
 

diff --git a/test/runtests.jl b/test/runtests.jl
@@ -6,3 +6,12 @@ using Printf
 @testset "Time and calendars" begin
     include("test_time.jl")
 end
+
+@testset "zero" begin
+    @test zero(DateTimeAllLeap) == CFTime.Millisecond(0)
+    @test zero(DateTimeNoLeap) == CFTime.Millisecond(0)
+    @test zero(DateTimeJulian) == CFTime.Millisecond(0)
+    @test zero(DateTimeJulian) == CFTime.Millisecond(0)
+    @test zero(DateTime360Day) == CFTime.Millisecond(0)
+    @test zero(DateTime360Day) == CFTime.Millisecond(0)
+end
-Original file line number
+Diff line change
@@ Expand Up / @@ -223,6 +223,7 @@ pattern given in the `format` string. @@
             $CFDateTime(dt::AbstractString, format::DateFormat) =
                 parse($CFDateTime, dt, format)
+            Base.zero(::Type{$CFDateTime}) = Millisecond(0)
         end
     end
@@ Expand Down @@