nil pointer

nil pointer的基本解释

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零指针

与nil pointer相关的网络例句 [注：此内容来源于网络，仅供参考]

This invention discloses a multi-queue sequence buffer management circuit and a method based on a pipeline applying a pipeline structure including: an arbitration circuit selecting one for process from read, write and distribution buffer requests, a buffer slot state module designing state of the slot requiring operation and queue numbers and assigning idle slots, a buffer slot filter module filtering the slot, a buffer slot filter module filtering the slot states not belonging to the current operation queues nor idle aligned in terms of the head pointer, a queue slot selection module computing continuous idle slot numbers from the slot pointed by the head pointer and refreshing the head pointer and selecting preparing slots, a queue slot prior queuing module refreshing the read pointer and result numbers of the current operation queues with the pointer of the first prepare slots and their numbers which can support multi-queue to share one buffer space, queues can access the buffer in overlap.

本发明公开一种基于流水线的多队列顺序化缓冲管理电路及方法，本发明电路采用流水线结构，包括：仲裁电路，从读、写、分配缓冲请求中选取一路进行处理；缓冲槽口状态设置模块，设置请求操作的槽口状态和队列号，分配空闲槽口；缓冲槽口滤除模块，滤除不属于当前操作队列且非空闲态的槽口状态，按头指针对齐；队列槽口选择模块，计算头指针指向槽口起的连续空闲槽口数并更新头指针，选出预备态的槽口；队列槽口优先排队模块，用第一个预备态槽口的指针和预备态槽口数分别更新当前操作队列的读指针和结果数；本发明可以支持多个队列共享一个缓冲空间，各类指令队列能对缓冲进行交叉访问，并对指令结果的写入读出进行顺序化管理。

Because a constructor sets the fields of a new object to zero or empty values before performing other actions, class-type and pointer-type fields in a partially constructed object are always nil. A destructor should therefore check for nil values before operating on class-type or pointer-type fields.

因为构造函数在执行其它动作之前先设置新对象的字段为 0 或空值，在一个只构建了一部分的对象中，类类型和指针类型的字段总是 nil，所以，在操作类类型和指针类型的字段时，析构函数必须检查它们是否为 nil。

In this paper,we first introduce the research background and theory foundation of the project.Then we present a new technique for designing theorem prover which mainly based on transformation and substitution for Pointer Logic,and we have implemented this technique in a tool called APL.As an extension of Hoare logic, Pointer Logic can be used for accurate pointer analysis of pointer programs.

在本文中，我们首先介绍了项目的研究背景和理论基础，然后提出了一种为指针逻辑来设计自动定理证明器的新技术，这项技术主要是基于变换和替代，我们已经在一个被称为APL的工具中实现了该技术。

与nil pointer相关的网络解释 [注：此内容来源于网络，仅供参考]

pointer counterbalance：指针平衡锤

pointer counter 指针式计数器 | pointer counterbalance 指针平衡锤 | pointer frequency meter 指针式频率计

pointer register, four address：四址指针缓存器

pointer operator 指标运算子 | pointer register, four address 四址指针缓存器 | pointer speed 指针速度

Pointer justification：指针调整

指针处理 pointer processing PP | 指针调整 Pointer justification | 指针调整计数 Pointer Justification Count PJC