C++核心准则​Pro.lifetime：生命周期安全群组

Pro.lifetime: Lifetime safety profile

Pro.lifetime：生命周期安全群组

Accessing through a pointer that doesn't point to anything is a major source of errors, and very hard to avoid in many traditional C or C++ styles of programming. For example, a pointer might be uninitialized, the nullptr, point beyond the range of an array, or to a deleted object.

通过没有指向任何内容的指针进行访问是错误的主要来源之一，这在许多传统的C或C ++编程风格中很难避免。例如，指针可能未初始化，空指针，指向数组范围之外或指向已删除的对象的指针。

See the current design specification here.

请参阅下面的最新设计规范。

https://github.com/isocpp/CppCoreGuidelines/blob/master/docs/Lifetime.pdf

Lifetime safety profile summary（声明周期安全群组摘要）:

• Lifetime.1: Don't dereference a possibly invalid pointer: detect or avoid.
• Lifetime.1：不要取消引用可能无效的指针：检测或避免。

Impact（影响）

Once completely enforced through a combination of style rules, static analysis, and library support, this profile

通过结合样式规则，静态分析和库支持彻底实施后，此规则群组

• eliminates one of the major sources of nasty errors in C++ 消除了C ++中令人讨厌的错误的主要来源之一
• eliminates a major source of potential security violations 消除了潜在的安全违反的主要根源
• improves performance by eliminating redundant "paranoia" checks 通过消除多余的“偏执”检查来提高性能
• increases confidence in correctness of code 增加对代码正确性的信心
• avoids undefined behavior by enforcing a key C++ language rule 通过执行关键的C ++语言规则避免未定义的行为

原文链接

https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#prolifetime-lifetime-safety-profile