merge revision(s) 66745,67397,67398,67399,67400,67409,67410,67411,67412,67425,67426,67473,67474: [Backport #15742]

	Bump version to date-2.0.0.

	  I forgot to change it when Ruby 2.6.0 was released.

	date_parse.c: extract Japanese era initials

	* expand tabs.

	date_parse.c: removed 'r' which is not in JIS X 0301 yet

	Added tests for end of Heisei

	date: use del_hash to extract an element destructively

	* expand tabs.

	date_parse.c: renamed JAPANESE prefix as JISX0301

	date_parse.c: name JISX0301_DEFAULT_ERA

	date: make zone a substring to copy encoding and taintedness

	* expand tabs.

	date_core.c: [DOC] Heisei will be assumed if no-era [ci skip]

	date: support for Reiwa, new Japanese era

	[Feature #15742]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67527 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 98 insertions, 2 deletions

diff --git a/test/date/test_date_parse.rb b/test/date/test_date_parse.rb
index ac0eb85ca7..e17fd3eb25 100644
--- a/test/date/test_date_parse.rb
+++ b/test/date/test_date_parse.rb
@@ -121,6 +121,8 @@ class TestDateParse < Test::Unit::TestCase
      [['S40.05.23T23:55:21-09:00',false],[1965,5,23,23,55,21,'-09:00',-9*3600,nil], __LINE__],
      [['H11.05.23 23:55:21Z',false],[1999,5,23,23,55,21,'Z',0,nil], __LINE__],
      [['H11.05.23T23:55:21Z',false],[1999,5,23,23,55,21,'Z',0,nil], __LINE__],
+     [['H31.04.30 23:55:21Z',false],[2019,4,30,23,55,21,'Z',0,nil], __LINE__],
+     [['H31.04.30T23:55:21Z',false],[2019,4,30,23,55,21,'Z',0,nil], __LINE__],
 
      # ofx date
      [['19990523235521',false],[1999,5,23,23,55,21,nil,nil,nil], __LINE__],
@@ -416,7 +418,14 @@ class TestDateParse < Test::Unit::TestCase
 	a[1] = -1
 	a[2] = h[:yday]
       end
-      assert_equal(y, a, format('<failed at line %d>', l))
+      l = format('<failed at line %d>', l)
+      assert_equal(y, a, l)
+      if y[6]
+        h = Date._parse(x[0].dup.taint, *x[1..-1])
+        assert_equal(y[6], h[:zone], l)
+        assert_equal(y[6].encoding, h[:zone].encoding, l)
+        assert_predicate(h[:zone], :tainted?, l)
+      end
     end
   end
 
@@ -984,6 +993,15 @@ class TestDateParse < Test::Unit::TestCase
     h = Date._jisx0301('S63.02.03')
     assert_equal([1988, 2, 3, nil, nil, nil, nil],
 		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.04.30')
+    assert_equal([2019, 4, 30, nil, nil, nil, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.05.01')
+    assert_equal([2019, 5, 1, nil, nil, nil, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('R01.05.01')
+    assert_equal([2019, 5, 1, nil, nil, nil, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
 
     h = Date._jisx0301('H13.02.03T04:05:06')
     assert_equal([2001, 2, 3, 4, 5, 6, nil],
@@ -998,6 +1016,45 @@ class TestDateParse < Test::Unit::TestCase
     assert_equal([2001, 2, 3, 4, 5, 6, 3600],
 		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
 
+    h = Date._jisx0301('H31.04.30T04:05:06')
+    assert_equal([2019, 4, 30, 4, 5, 6, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.04.30T04:05:06,07')
+    assert_equal([2019, 4, 30, 4, 5, 6, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.04.30T04:05:06Z')
+    assert_equal([2019, 4, 30, 4, 5, 6, 0],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.04.30T04:05:06.07+0100')
+    assert_equal([2019, 4, 30, 4, 5, 6, 3600],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+
+    h = Date._jisx0301('H31.05.01T04:05:06')
+    assert_equal([2019, 5, 1, 4, 5, 6, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.05.01T04:05:06,07')
+    assert_equal([2019, 5, 1, 4, 5, 6, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.05.01T04:05:06Z')
+    assert_equal([2019, 5, 1, 4, 5, 6, 0],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('H31.05.01T04:05:06.07+0100')
+    assert_equal([2019, 5, 1, 4, 5, 6, 3600],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+
+    h = Date._jisx0301('R01.05.01T04:05:06')
+    assert_equal([2019, 5, 1, 4, 5, 6, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('R01.05.01T04:05:06,07')
+    assert_equal([2019, 5, 1, 4, 5, 6, nil],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('R01.05.01T04:05:06Z')
+    assert_equal([2019, 5, 1, 4, 5, 6, 0],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+    h = Date._jisx0301('R01.05.01T04:05:06.07+0100')
+    assert_equal([2019, 5, 1, 4, 5, 6, 3600],
+		 h.values_at(:year, :mon, :mday, :hour, :min, :sec, :offset))
+
     h = Date._jisx0301('')
     assert_equal({}, h)
   end
@@ -1083,9 +1140,33 @@ class TestDateParse < Test::Unit::TestCase
     assert_equal(Date.new(2001,2,3), d)
     assert_equal(Date::ITALY + 10, d.start)
 
+    d = Date.jisx0301('H31.04.30', Date::ITALY + 10)
+    assert_equal(Date.new(2019,4,30), d)
+    assert_equal(Date::ITALY + 10, d.start)
+
+    d = Date.jisx0301('H31.05.01', Date::ITALY + 10)
+    assert_equal(Date.new(2019,5,1), d)
+    assert_equal(Date::ITALY + 10, d.start)
+
+    d = Date.jisx0301('R01.05.01', Date::ITALY + 10)
+    assert_equal(Date.new(2019,5,1), d)
+    assert_equal(Date::ITALY + 10, d.start)
+
     d = DateTime.jisx0301('H13.02.03T04:05:06+07:00', Date::ITALY + 10)
     assert_equal(DateTime.new(2001,2,3,4,5,6,'+07:00'), d)
     assert_equal(Date::ITALY + 10, d.start)
+
+    d = DateTime.jisx0301('H31.04.30T04:05:06+07:00', Date::ITALY + 10)
+    assert_equal(DateTime.new(2019,4,30,4,5,6,'+07:00'), d)
+    assert_equal(Date::ITALY + 10, d.start)
+
+    d = DateTime.jisx0301('H31.05.01T04:05:06+07:00', Date::ITALY + 10)
+    assert_equal(DateTime.new(2019,5,1,4,5,6,'+07:00'), d)
+    assert_equal(Date::ITALY + 10, d.start)
+
+    d = DateTime.jisx0301('R01.05.01T04:05:06+07:00', Date::ITALY + 10)
+    assert_equal(DateTime.new(2019,5,1,4,5,6,'+07:00'), d)
+    assert_equal(Date::ITALY + 10, d.start)
   end
 
   def test_given_string
@@ -1120,6 +1201,16 @@ class TestDateParse < Test::Unit::TestCase
     s0 = s.dup
     assert_not_equal({}, Date._jisx0301(s))
     assert_equal(s0, s)
+
+    s = 'H31.04.30T04:05:06,07Z'
+    s0 = s.dup
+    assert_not_equal({}, Date._jisx0301(s))
+    assert_equal(s0, s)
+
+    s = 'H31.05.01T04:05:06,07Z'
+    s0 = s.dup
+    assert_not_equal({}, Date._jisx0301(s))
+    assert_equal(s0, s)
   end
 
 end
diff --git a/test/date/test_date_strftime.rb b/test/date/test_date_strftime.rb
index a33eaa340f..dc237a909d 100644
--- a/test/date/test_date_strftime.rb
+++ b/test/date/test_date_strftime.rb
@@ -406,6 +406,8 @@ class TestDateStrftime < Test::Unit::TestCase
     assert_equal('S64.01.07', Date.parse('1989-01-07').jisx0301)
     assert_equal('H01.01.08', Date.parse('1989-01-08').jisx0301)
     assert_equal('H18.09.01', Date.parse('2006-09-01').jisx0301)
+    assert_equal('H31.04.30', Date.parse('2019-04-30').jisx0301)
+    assert_equal('R01.05.01', Date.parse('2019-05-01').jisx0301)
 
     %w(M06.01.01
        M45.07.29
@@ -414,7 +416,10 @@ class TestDateStrftime < Test::Unit::TestCase
        S01.12.25
        S64.01.07
        H01.01.08
-       H18.09.01).each do |s|
+       H18.09.01
+       H31.04.30
+       R01.05.01
+    ).each do |s|
       assert_equal(s, Date.parse(s).jisx0301)
     end