RSTRING_PTR        47 ext/json/ext/generator/unicode.h #define RSTRING_PTR(string) RSTRING(string)->ptr
RSTRING_PTR        52 ext/json/ext/parser/unicode.h #define RSTRING_PTR(string) RSTRING(string)->ptr
RSTRING_PTR       600 include/ruby/ruby.h #define RSTRING_PTR(str) \