From: hanmac@gmx.de
To: ruby-core@ruby-lang.org
Subject: [ruby-core:99414] [Ruby master Bug#17093] attr_accessor works strange
Date: Fri, 31 Jul 2020 07:34:56 +0000 (UTC) [thread overview]
Message-ID: <redmine.journal-86861.20200731073456.42330@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-17093.20200730205017.42330@ruby-lang.org
Issue #17093 has been updated by Hanmac (Hans Mackowiak).
This:
``if type.nil?
type = 'default'
end``
is different from this:
`type = 'default' if type.nil?`
because of the lexical reading, it reads the setting of local variable first and now assumes that type is local variable in this case
----------------------------------------
Bug #17093: attr_accessor works strange
https://bugs.ruby-lang.org/issues/17093#change-86861
* Author: mpavel (pavel m)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin17]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
require 'rubygems'
class A
def initialize(type:)
@type = type
end
def b
p type
p type.nil?
type = 'default' if type.nil?
type
end
private
attr_accessor :type
end
RSpec.describe A do
let(:type) { 'whoaaa' }
it 'return default' do
expect(A.new(type: type).b).to eq('default')
end
it 'instance variable is "whoaaa"' do
expect(A.new(type: type).instance_variable_get(:@type)).to eq(type)
end
end
all tests green
output
A
"whoaaa"
false
return default
instance variable is "whoaaa"
--
https://bugs.ruby-lang.org/
next prev parent reply other threads:[~2020-07-31 7:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-30 20:50 [ruby-core:99405] [Ruby master Bug#17093] attr_accessor works strange mpavel
2020-07-30 21:18 ` [ruby-core:99406] " merch-redmine
2020-07-30 22:31 ` [ruby-core:99408] " mpavel
2020-07-30 22:41 ` [ruby-core:99409] " merch-redmine
2020-07-31 6:27 ` [ruby-core:99412] " mpavel
2020-07-31 7:34 ` hanmac [this message]
2020-07-31 8:31 ` [ruby-core:99416] " mpavel
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