s******s
发帖数: 505 | 1 C++ STL list 的实现：
为什么先写一个base类型，然后再从base继承出主要类型，比如list？
这个base似乎在任何别的地方都用不到。
这样做，从编程方法上有什么优越之处？谢谢！ |
t****t
发帖数: 6806 | 2 maybe, in case you want to have any specialized implementation?
【在 s******s 的大作中提到】
: C++ STL list 的实现：
: 为什么先写一个base类型，然后再从base继承出主要类型，比如list？
: 这个base似乎在任何别的地方都用不到。
: 这样做，从编程方法上有什么优越之处？谢谢！
|
s******s
发帖数: 505 | 3
The header file noted that the purpose was to "split into" a
non-template base and a template type node. However, I fail
to see the point of doing this, since the STL list is only used and
known as a template class.
【在 t****t 的大作中提到】
: maybe, in case you want to have any specialized implementation?
|
t****t
发帖数: 6806 | 4 if the base class is non-template, then it makes perfect sense --- the non-
template part can be pre-compiled. i thought you are referring to libstdc++
(in which case the base class is also a template).
【在 s******s 的大作中提到】
:
: The header file noted that the purpose was to "split into" a
: non-template base and a template type node. However, I fail
: to see the point of doing this, since the STL list is only used and
: known as a template class.
|
X****r
发帖数: 3557 | 5 For each type as the parameter of this node class, the compiler
needs to generate a separate piece code for each instantiated class.
By moving common logic from the template node class to a
non-template base class, the corresponding code no longer get
duplicated, resulting smaller binaries.
【在 s******s 的大作中提到】
:
: The header file noted that the purpose was to "split into" a
: non-template base and a template type node. However, I fail
: to see the point of doing this, since the STL list is only used and
: known as a template class.
|
s******s
发帖数: 505 | 6
Thank you.
【在 X****r 的大作中提到】
: For each type as the parameter of this node class, the compiler
: needs to generate a separate piece code for each instantiated class.
: By moving common logic from the template node class to a
: non-template base class, the corresponding code no longer get
: duplicated, resulting smaller binaries.
|
s******s
发帖数: 505 | 7
+
Now I am confused. Sorry I don't know C++ well.
I thought STL was part of libstdc++.
【在 t****t 的大作中提到】
: if the base class is non-template, then it makes perfect sense --- the non-
: template part can be pre-compiled. i thought you are referring to libstdc++
: (in which case the base class is also a template).
|
t****t
发帖数: 6806 | 8 libstdc++ is one particular (gcc's) implementation of STL
【在 s******s 的大作中提到】
:
: +
: Now I am confused. Sorry I don't know C++ well.
: I thought STL was part of libstdc++.
|
|
s******s
发帖数: 505 | 9
I see, thank you.
【在 t****t 的大作中提到】
: libstdc++ is one particular (gcc's) implementation of STL
|
