RUBY_ECONV_UNDEF_HEX_CHARREF  363 include/ruby/encoding.h RUBY_ECONV_UNDEF_HEX_CHARREF                = 0x00000030,
RUBY_ECONV_UNDEF_HEX_CHARREF  390 include/ruby/encoding.h #define ECONV_UNDEF_HEX_CHARREF                 RUBY_ECONV_UNDEF_HEX_CHARREF