rb_struct_aref    882 include/ruby/intern.h VALUE rb_struct_aref(VALUE, VALUE);
rb_struct_aref    949 struct.c           return rb_struct_aref(s, LONG2NUM(n));
rb_struct_aref   1208 struct.c           rb_define_method(rb_cStruct, "[]", rb_struct_aref, 1);
rb_struct_aref   2511 vm_insnhelper.c     TOPN(0) = rb_struct_aref(GET_SELF(), TOPN(0));