`this` 指针的值在对象的生命周期内是否不变？
Is the value of `this` pointer constant during the object's lifetime?
this 指针的值是否保证在特定对象的生命周期内保持不变？我无法想象它会改变的情况，但不知道我是否没有遗漏一些东西。
Is the value of this pointer guaranteed to be constant during a lifetime of a particular object?
是.
正如用户Aconcagua所说：this指针的值始终是调用函数的对象的地址值在1。所以这个问题等同于：
Can an object change its memory address over life time?
根据 lifetime2 的定义，这是不可能的。对象的生命周期从获得其存储时或之后开始，到释放之前结束。
In the body of a non-static ([class.mfct]) member function, the keyword this is a prvalue whose value is a pointer to the object for which the function is called.
2) [basic.life]/1（强调我的）
The lifetime of an object or reference is a runtime property of the object or reference. A variable is said to have vacuous initialization if it is default-initialized and, if it is of class type or a (possibly multi-dimensional) array thereof, that class type has a trivial default constructor.
The lifetime of an object of type T begins when:
- storage with the proper alignment and size for type
T is obtained, and
- its initialization (if any) is complete (including vacuous initialization) (
[dcl.init]), except that if the object is a union member or subobject thereof, its lifetime only begins if that union member is the initialized member in the union ([dcl.init.aggr], [class.base.init]), or as described in [class.union].
The lifetime of an object o of type T ends when:
- if
T is a non-class type, the object is destroyed, or
- if
T is a class type, the destructor call starts, or
- the storage which the object occupies is released, or is reused by an object that is not nested within
o ([intro.object]).
一个对象有一个存储区域。 this 指向那里。
An object occupies a region of storage in its period of construction ([class.cdtor]), throughout its lifetime, and in its period of destruction ([class.cdtor]).
this 的值保证是常量，如果程序曾经读取它，如果随后读取值的某些位不可能被垃圾收集，或者如果随后读取值的某些位在该程序。在所有其他情况下，它的行为就像薛定谔的猫，也就是说，它既是常数又是变量。
this 指针的值是否保证在特定对象的生命周期内保持不变？我无法想象它会改变的情况，但不知道我是否没有遗漏一些东西。
Is the value of
thispointer guaranteed to be constant during a lifetime of a particular object?
是.
正如用户Aconcagua所说：this指针的值始终是调用函数的对象的地址值在1。所以这个问题等同于：
Can an object change its memory address over life time?
根据 lifetime2 的定义，这是不可能的。对象的生命周期从获得其存储时或之后开始，到释放之前结束。
In the body of a non-static (
[class.mfct]) member function, the keywordthisis a prvalue whose value is a pointer to the object for which the function is called.
2) [basic.life]/1（强调我的）
The lifetime of an object or reference is a runtime property of the object or reference. A variable is said to have vacuous initialization if it is default-initialized and, if it is of class type or a (possibly multi-dimensional) array thereof, that class type has a trivial default constructor. The lifetime of an object of type
Tbegins when:
- storage with the proper alignment and size for type
Tis obtained, and- its initialization (if any) is complete (including vacuous initialization) (
[dcl.init]), except that if the object is a union member or subobject thereof, its lifetime only begins if that union member is the initialized member in the union ([dcl.init.aggr],[class.base.init]), or as described in[class.union].The lifetime of an object
oof typeTends when:
- if
Tis a non-class type, the object is destroyed, or- if
Tis a class type, the destructor call starts, or- the storage which the object occupies is released, or is reused by an object that is not nested within
o([intro.object]).
一个对象有一个存储区域。 this 指向那里。
An object occupies a region of storage in its period of construction (
[class.cdtor]), throughout its lifetime, and in its period of destruction ([class.cdtor]).
this 的值保证是常量，如果程序曾经读取它，如果随后读取值的某些位不可能被垃圾收集，或者如果随后读取值的某些位在该程序。在所有其他情况下，它的行为就像薛定谔的猫，也就是说，它既是常数又是变量。