From: Tanaka Akira <akr@...>
Date: 2013-03-27T20:44:24+09:00
Subject: [ruby-core:53771] Re: [ruby-trunk - Bug #8173][Open] 2-arg form of Time.at can take a Time as either argument

2013/3/27 hasari (Hiro Asari) <asari.ruby@gmail.com>:

> Bug #8173: 2-arg form of Time.at can take a Time as either argument
> https://bugs.ruby-lang.org/issues/8173

> http://www.ruby-doc.org/core-2.0/Time.html#method-c-at shows 3 forms of invocation:
>
> at(time) → time click to toggle source
> at(seconds_with_frac) → time
> at(seconds, microseconds_with_frac) → time
>
> But the last form can take a Time as either argument (and converts to a numeric value represented by the number of seconds since the Epoch). If a Time is used as the second argument, the numeric value is then converted to microseconds to return a Time. (I hope that I'm making sense.)
>
> irb(main):001:0> RUBY_DESCRIPTION
> => "ruby 2.1.0dev (2013-03-11 trunk 39724) [x86_64-darwin12.2.1]"
> irb(main):002:0> t1=Time.at(10)
> => 1969-12-31 19:00:10 -0500
> irb(main):003:0> t2=Time.at(t1,t1)
> => 1969-12-31 19:00:10 -0500
> irb(main):004:0> t2.usec
> => 10
>
> Is this intended behavior? If so, the documentation should be updated.

It is a bug.
-- 
Tanaka Akira