QUEUE_EMPTY       220 ext/psych/yaml/api.c     while (!QUEUE_EMPTY(parser, parser->tokens)) {
QUEUE_EMPTY       393 ext/psych/yaml/api.c     while (!QUEUE_EMPTY(emitter, emitter->events)) {
QUEUE_EMPTY       315 ext/psych/yaml/emitter.c     if (QUEUE_EMPTY(emitter, emitter->events))