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[ruby/date] Describe what is meant by valid in the Date.valid_date? rdoc

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https://github.com/ruby/date/commit/8eca79d1f0
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Jeremy Evans 2019-06-26 16:36:52 -07:00 • committed by Hiroshi SHIBATA
parent f75561b8d4
commit 9095ff53cf
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ext/date/date_core.c
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@ -2545,9 +2545,12 @@ date_s__valid_civil_p(int argc, VALUE *argv, VALUE klass)
* Date.valid_date?(year, month, mday[, start=Date::ITALY]) -> bool
*
* Returns true if the given calendar date is valid, and false if not.
* Valid in this context is whether the arguments passed to this
* method would be accepted by ::new.
*
* Date.valid_date?(2001,2,3) #=> true
* Date.valid_date?(2001,2,29) #=> false
* Date.valid_date?(2001,2,-1) #=> true
*
* See also ::jd and ::civil.
*/