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yujinakayama/why_us-ascii_magic_comment_accepts_and_convert_invalid_regexp_to_binary.txt Secret

Last active August 29, 2015 13:56
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why_us-ascii_magic_comment_accepts_and_convert_invalid_regexp_to_binary.txt
$ ruby -v
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin13.0]
$ cat utf-8.rb
# coding: utf-8
p /./.encoding
p /\xff/.encoding
$ ruby utf-8.rb
utf-8.rb:3: invalid multibyte escape: /\xff/
$ cat us-ascii.rb
# coding: US-ASCII
p /./.encoding
p /\xff/.encoding
$ ruby us-ascii.rb
#<Encoding:US-ASCII>
#<Encoding:ASCII-8BIT>
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