BOOLEAN_EXPRESSION  278 create.c           exp = crb_alloc_expression(BOOLEAN_EXPRESSION);
BOOLEAN_EXPRESSION  254 eval.c             case BOOLEAN_EXPRESSION:	/* FALLTHRU */
BOOLEAN_EXPRESSION  330 eval.c             case BOOLEAN_EXPRESSION:	/* FALLTHRU */
BOOLEAN_EXPRESSION  823 eval.c             case BOOLEAN_EXPRESSION: