ASSIGN_EXPRESSION  171 create.c           exp = crb_alloc_expression(ASSIGN_EXPRESSION);
ASSIGN_EXPRESSION  324 eval.c             case ASSIGN_EXPRESSION:
ASSIGN_EXPRESSION  412 eval.c             case ASSIGN_EXPRESSION:
ASSIGN_EXPRESSION 1657 eval.c             case ASSIGN_EXPRESSION:
ASSIGN_EXPRESSION  204 util.c             case ASSIGN_EXPRESSION:	/* FALLTHRU */