Date/DateTimeの仕様について

Ruby Development
1

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irb(main):002:0> DateTime.new(4172,1,1,Rational(1,2))
=> #<DateTime: 4172-01-01T00:30:00+00:00
((3244852j,1800s,0n),+0s,2299161j)>
irb(main):003:0> DateTime.new(4172,1,1,Rational(1,2),0)
ArgumentError: invalid fraction
irb(main):004:0> DateTime.new(4172,1,1,1.5)
=> #<DateTime: 4172-01-01T01:30:00+00:00
((3244852j,5400s,0n),+0s,2299161j)>
irb(main):005:0> DateTime.new(4172,1,1,1.5,0)
ArgumentError: invalid fraction
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diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index cd2bc68…0ae553b 100644
— a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -3071,8 +3071,6 @@ s_trunc(VALUE s, VALUE *fr)
{
s = s##_trunc(v##s, &fr);
if (f_nonzero_p(fr)) {\

  •   if (argc > n)\

  •       rb_raise(rb_eArgError, "invalid fraction");\
  fr2 = fr;\
    }
    }
    @@ -3081,8 +3079,6 @@ s_trunc(VALUE s, VALUE *fr)
    {
    s = NUM2INT(s##_trunc(v##s, &fr));
    if (f_nonzero_p(fr)) {\
  •   if (argc > n)\

  •       rb_raise(rb_eArgError, "invalid fraction");\
  fr2 = fr;\
    }
    }

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irb(main):002:0> DateTime.new(4172,1,1,23)
=> #<DateTime: 4172-01-01T23:00:00+00:00
((3244852j,82800s,0n),+0s,2299161j)
irb(main):003:0> DateTime.new(4172,1,1,24)
=> #<DateTime: 4172-01-01T23:00:00+00:00
((3244853j,0s,0n),+0s,2299161j)>
irb(main):002:0> DateTime.new(4172,1,1,24).hour
=> 24
irb(main):003:0> DateTime.new(4172,1,1,24).day
=> 1
irb(main):004:0> DateTime.new(4172,1,2)
=> #<DateTime: 4172-01-02T00:00:00+00:00
((3244853j,0s,0n),+0s,2299161j)>
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irb(main):002:0> DateTime.new(4172,1,1,24)
=> #<DateTime: 4172-01-02T00:00:00+00:00 (6489705/2,0,2299161)>
irb(main):003:0> DateTime.new(4172,1,2,0)
=> #<DateTime: 4172-01-02T00:00:00+00:00 (6489705/2,0,2299161)>
irb(main):002:0> DateTime.new(4172,1,1,24).hour
=> 0
irb(main):003:0> DateTime.new(4172,1,1,24).day
=> 2

2

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DateTime.new(4172,1,1,1.5)
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Tomoaki NISHIYAMA

Advanced Science Research Center,
Kanazawa University,
13-1 Takara-machi,
Kanazawa, 920-0934, Japan

4

(2011/06/21 20:23), Tadayoshi F. wrote:

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5

DateTime.new(4172,1,1,1.5)
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