* re.c (rb_reg_preprocess): new function for dynamic regexp with
\u{} such as Regexp.new("\\u{6666}").
(rb_reg_prepare_re): preprocess regexp for recompiling.
(read_escaped_byte): new function.
(unescape_escaped_nonascii): new function.
(append_utf8): new function.
(unescape_unicode_list): new function.
(unescape_unicode_bmp): new function.
(unescape_nonascii): new function.
(rb_reg_initialize): preprocess regexp.
* pack.c (rb_uv_to_utf8): renamed from uv_to_utf8.
* parse.y (STR_NEW3): take func instead of has8 and hasmb.
(parser_str_new): use default coderange mechanism except for regexp.
(parser_tokadd_utf8): copy regexp source as-is.
(parser_read_escape): UTF-8 stuff removed.
(parser_tokadd_escape): has8bit and hasmb removed.
(parser_tokadd_string): fix 8-bit single byte character with \u.
(parser_parse_string): has8bit and hasmb removed.
(parser_here_document): has8bit and hasmb removed.
(parser_yylex): call parser_tokadd_utf8 instead of read_escape for
UTF-8 character.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14072 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
also modifications for better coderange detection
* test/ruby/test_unicode_escapes.rb: test cases
* test/ruby/test_mixed_unicode_escapes.rb: mixed encoding test cases
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13836 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
