rb_struct_aset    883 include/ruby/intern.h VALUE rb_struct_aset(VALUE, VALUE, VALUE);
rb_struct_aset   1209 struct.c           rb_define_method(rb_cStruct, "[]=", rb_struct_aset, 2);
rb_struct_aset   2518 vm_insnhelper.c     rb_struct_aset(GET_SELF(), TOPN(0), TOPN(1));