From: tarui@...
Date: 2018-07-30T07:31:41+00:00
Subject: [ruby-core:88187] [Ruby trunk Feature#14473] Add Range#subrange?

Issue #14473 has been updated by tarui (Masaya Tarui).



Thank you for your patch owst.

I reviewed it and feel the behavior below is strange.
~~~ 
$ ruby -e 'p (1..3.1).cover?(1...3)'
true
$ ruby -e 'p (1..3.1).cover?(1...4)'
Traceback (most recent call last):
        1: from -e:1:in `<main>'
-e:1:in `cover?': can't iterate from Float (TypeError)
~~~
At `(a..b).cover?(c...d)` with `b < d`,
is it reasonable to use `(c...d).max`(but ignore exception) for comparison with `b`? 


----------------------------------------
Feature #14473: Add Range#subrange?
https://bugs.ruby-lang.org/issues/14473#change-73206

* Author: greggzst (Grzegorz Jakubiak)
* Status: Assigned
* Priority: Normal
* Assignee: tarui (Masaya Tarui)
* Target version: 
----------------------------------------
Hi there,

I'd like to propose a method that returns true when a range that the method gets called on is a subrange of a range passed in as an argument.

Example:

~~~ ruby
(2..4).subrange?(1...4) 
=> true
(-2..2).subrange?(-1..3) 
=> false
~~~




---Files--------------------------------
0001-range.c-add-subset-superset-methods.patch (8.84 KB)
v2-0001-range.c-add-subset-superset-methods.patch (8.85 KB)
v3-0001-range.c-add-subrange-superrange-methods.patch (9.24 KB)
v4-0001-range.c-allow-cover-to-accept-Range-argument.patch (4.45 KB)


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