From: "mrkn (Kenta Murata) via ruby-core" <ruby-core@...>
Date: 2024-01-17T16:28:57+00:00
Subject: [ruby-core:116277] [Ruby master Bug#5179] Complex#rationalize and to_r with approximate zeros

Issue #5179 has been updated by mrkn (Kenta Murata).


I'm working on to_r at https://github.com/ruby/ruby/pull/9581.
I will do other methods later.

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Bug #5179: Complex#rationalize and to_r with approximate zeros
https://bugs.ruby-lang.org/issues/5179#change-106299

* Author: marcandre (Marc-Andre Lafortune)
* Status: Assigned
* Priority: Normal
* Assignee: mrkn (Kenta Murata)
* ruby -v: r32354
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Currently, Complex#rationalize and Complex#to_r raise a RangeError if the imaginary part is nonzero *or is a Float*. Note that a BigDecimal(0) is accepted, though:

    Complex(1, 0).to_r                 # => Rational(1,1)
    Complex(1, BigDecimal("0.0")).to_r # => Rational(1,1)
    Complex(1, 0.0).to_r               # => RangeError

This is inconsistent. I recommend not raising an error for 0.0 (Float or BigDecimal). Any objection?




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