f******n
发帖数: 90 | 1 最近研究了一下cast, 成果如下，大家看看如何：
const_cast:
It's only used to add or remove qualifiers: const or volatile. Note: static
_cast can add const and can never remove const.
reinterpret_cast:
It never does any check, neither compile time nor runtime. But it requires
the two types have the same storage size in memory.
static_cast VS dynamic_cast:
In the inheritance hierarchy (all public inheritance), upcast will always
work, even without any type of explicit cast. static_cast will work for
downcast too wi | X****r
发帖数: 3557 | 2 你漏了一条：
只要T t(e);是well-formed就可以static_cast(e)
static
requires
【在 f******n 的大作中提到】
: 最近研究了一下cast, 成果如下，大家看看如何：
: const_cast:
: It's only used to add or remove qualifiers: const or volatile. Note: static
: _cast can add const and can never remove const.
: reinterpret_cast:
: It never does any check, neither compile time nor runtime. But it requires
: the two types have the same storage size in memory.
: static_cast VS dynamic_cast:
: In the inheritance hierarchy (all public inheritance), upcast will always
: work, even without any type of explicit cast. static_cast will work for
| f******n
发帖数: 90 | 3 Thanks for the extra note!
I will add another one:
Both static_cast and dynamic_cast respect access controls. That means if
the inheritance is not public, compiler will report error when you try to
upcast. | k**m
发帖数: 222 | | a*******s
发帖数: 324 | 5 for the upcast, do you mean derived --->base?
downcast, base-->derived?
Thanks,
【在 f******n 的大作中提到】
: Thanks for the extra note!
: I will add another one:
: Both static_cast and dynamic_cast respect access controls. That means if
: the inheritance is not public, compiler will report error when you try to
: upcast.
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