WhileOps.java 文件源码

@Override
public boolean tryAdvance(DoubleConsumer action) {
    boolean test = true;
    if (takeOrDrop &&               // If can take
        checkCancelOnCount() && // and if not cancelled
        s.tryAdvance(this) &&   // and if advanced one element
        (test = p.test(t))) {   // and test on element passes
        action.accept(t);           // then accept element
        return true;
    }
    else {
        // Taking is finished
        takeOrDrop = false;
        // Cancel all further traversal and splitting operations
        // only if test of element failed (short-circuited)
        if (!test)
            cancel.set(true);
        return false;
    }
}