[ruby-cvs:66921] nobu:r59743 (trunk): string.c: grapheme clusters on frozen string

[nobu at ruby-lang.org]

nobu	2017-09-04 23:04:54 +0900 (Mon, 04 Sep 2017)

  New Revision: 59743

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59743

  Log:
    string.c: grapheme clusters on frozen string
    
    * string.c (rb_str_enumerate_grapheme_clusters): enumerate on
      shared frozen string.

  Modified files:
    trunk/string.c
    trunk/test/ruby/test_string.rb