类方法的指针数组 [英] array of pointers to class methods

问题描述

你好，

希望有人能告诉我怎么做 - 我是一个老''C''黑客所以

有时候我会陷入困境 - 这是其中一次......


我在课堂上有很多方法，我希望能够获得$>
从数组中查找和调​​用。在''c''我会做的事情如下：


struct thingie {

char * name;

void（* ptrtofunc）（）;

} listofthingies [] = {

{" func1"，func1}，

{" func2"，func2}

};


其中func1和func1是返回void的函数，我通常会通过

来调用类似的东西（例如）：


（listofthingies [0] .func1）（）;


这里，我的等价物是（缩写）：


struct functable {

CString name;

void（CMyApp :: * wscfunc）（）;

} functable [] = {

{" send"，& CMyApp :: func1}，

{" wsasend"，& CMyApp :: func2}，

};


但是，

（functable [0] .wscfunc）（）;


只是导致术语不评估函数。在这个特定情况下，我的

参考书都没有帮助。


所以，这里有两个问题：1。解决这个问题的快捷方法是什么（即：可以

我用这种方式引用我的方法吗？），和2.什么是更好的C ++方式来实现同样的事情？

Hello,
Hope someone can tell me how to do this - I''m an old ''C'' hack so
sometimes I get stuck in old-think...this is one of those times...

I''ve got a bunch of methods in a class that I want to be able to
lookup and call from an array. In ''c'' I''d just do something like:

struct thingie {
char *name;
void (*ptrtofunc)();
} listofthingies[] = {
{ "func1", func1 },
{ "func2", func2 }
};

where func1 and func1 are functions that return void that I would usually
call via something like (for example):

(listofthingies[0].func1)();

Here, the equivalent I have is (abbreviated):

struct functable {
CString name;
void (CMyApp::*wscfunc)();
} functable [] = {
{ "send", &CMyApp::func1 },
{ "wsasend", &CMyApp::func2 },
};

But,
(functable[0].wscfunc)();

just results in "term does not evaluate to a function". None of my
reference books help, in this specific case.

So, two questions here: 1. What is the quick way to resolve this (ie: can
I reference my methods this way?), and 2. What is the better C++ way to
accomplish the same thing?

推荐答案

Anonymoose< Ihatespam>写在

新闻：Xn *********************** @ 216.196.97.136：

Anonymoose <Ihatespam> wrote in
news:Xn***********************@216.196.97.136:

你好，
希望有人能告诉我怎么做 - 我是一个老''C''黑客
所以
有时候我会陷入旧思想中...这是其中一次......

我在课堂上有很多方法，我希望能够从一个课程中查找和拨打电话。阵列。在''c''我会做类似的事情：

struct thingie {
char * name;
void（* ptrtofunc）（）;
} listofthingies [] = {
{" func1"，func1}，
{" func2"，func2}
};

其中func1和func1是返回void的函数，我通常会通过类似的东西调用（例如）：

（listofthingies [0] .func1）（）;

Hello,
Hope someone can tell me how to do this - I''m an old ''C'' hack
so
sometimes I get stuck in old-think...this is one of those times...

I''ve got a bunch of methods in a class that I want to be able
to
lookup and call from an array. In ''c'' I''d just do something like:

struct thingie {
char *name;
void (*ptrtofunc)();
} listofthingies[] = {
{ "func1", func1 },
{ "func2", func2 }
};

where func1 and func1 are functions that return void that I would
usually call via something like (for example):

(listofthingies[0].func1)();

更正......我的意思是：


（listofthingies [0] .ptrtofunc）（）;

Correction...I meant:

(listofthingies[0].ptrtofunc)();

" Anonymoose" < Ihatespam>在消息中写道

news：Xn *********************** @ 216.196.97.136 ...

"Anonymoose" <Ihatespam> wrote in message
news:Xn***********************@216.196.97.136...

你好，
希望有人可以告诉我该怎么做 - 我是一个老''C''黑客所以
有时我会陷入旧思维......这是其中之一那些时间......

我在类中有很多方法，我希望能够从数组中查找和调​​用。在''c''我会做类似的事情：

struct thingie {
char * name;
void（* ptrtofunc）（）;
} listofthingies [] = {
{" func1"，func1}，
{" func2"，func2}
};

其中func1和func1是返回void的函数我通常会通过类似的东西来调用（例如）：

（listofthingies [0] .func1）（）;

这里，相当于我的（缩写）：

struct functable {
CString name;
void（CMyApp :: * wscfunc）（）;
} functable [] = {
{" send"，& CMyApp :: func1}，
{" wsasend"，& CMyApp :: func2}，
};
（functable [0] .wscfunc）（）;


您需要一个对象来调用成员函数。在你的情况下，一个对象是

类型CMyApp。


汤姆。

只是导致术语不评估到一个功能。在这个特定情况下，我的
参考书都没有帮助。

所以，这里有两个问题：1。解决这个问题的快捷方法是什么（即：
我可以参考我的方法是这样的？），2。什么是更好的C ++方式来完成同样的事情？

Hello,
Hope someone can tell me how to do this - I''m an old ''C'' hack so
sometimes I get stuck in old-think...this is one of those times...

I''ve got a bunch of methods in a class that I want to be able to
lookup and call from an array. In ''c'' I''d just do something like:

struct thingie {
char *name;
void (*ptrtofunc)();
} listofthingies[] = {
{ "func1", func1 },
{ "func2", func2 }
};

where func1 and func1 are functions that return void that I would usually
call via something like (for example):

(listofthingies[0].func1)();

Here, the equivalent I have is (abbreviated):

struct functable {
CString name;
void (CMyApp::*wscfunc)();
} functable [] = {
{ "send", &CMyApp::func1 },
{ "wsasend", &CMyApp::func2 },
};

But,
(functable[0].wscfunc)();
You need an object to call a member function on. In your case, an object of
type CMyApp.

Tom.

just results in "term does not evaluate to a function". None of my
reference books help, in this specific case.

So, two questions here: 1. What is the quick way to resolve this (ie: can I reference my methods this way?), and 2. What is the better C++ way to
accomplish the same thing?

" TT \ （Tom Tempelaere \）" < _N ************** @ hotmail.comMAPSO_N_>写在

新闻：TL ****************** @ phobos.telenet-ops.be:

"TT \(Tom Tempelaere\)" <_N**************@hotmail.comMAPSO_N_> wrote in
news:TL******************@phobos.telenet-ops.be:

Anonymoose < Ihatespam>在消息中写道
新闻：Xn *********************** @ 216.196.97.136 ...

"Anonymoose" <Ihatespam> wrote in message
news:Xn***********************@216.196.97.136...

你好，
希望有人可以告诉我怎么做 - 我是一个老''C''黑客所以
有时候我会陷入旧思维......这是其中一次...... 。

我在类中有很多方法，我希望能够从数组中查找和调​​用。在''c''我会做类似的事情：

struct thingie {
char * name;
void（* ptrtofunc）（）;
} listofthingies [] = {
{" func1"，func1}，
{" func2"，func2}
};

其中func1和func1是返回void的函数，我通常会通过类似的东西调用（例如）：

（listofthingies [0] .func1）（）;

这里，相当于我的（缩写）：

struct functable {
CString name;
void（CMyApp :: * wscfunc）（）;
} functable [] = {
{" send"，& CMyApp :: func1}，
{" wsasend"，& CMyApp :: func2}，
};
（functable [0] .wscfunc）（）;

Hello,
Hope someone can tell me how to do this - I''m an old ''C'' hack so
sometimes I get stuck in old-think...this is one of those times...

I''ve got a bunch of methods in a class that I want to be able to
lookup and call from an array. In ''c'' I''d just do something like:

struct thingie {
char *name;
void (*ptrtofunc)();
} listofthingies[] = {
{ "func1", func1 },
{ "func2", func2 }
};

where func1 and func1 are functions that return void that I would
usually call via something like (for example):

(listofthingies[0].func1)();

Here, the equivalent I have is (abbreviated):

struct functable {
CString name;
void (CMyApp::*wscfunc)();
} functable [] = {
{ "send", &CMyApp::func1 },
{ "wsasend", &CMyApp::func2 },
};

But,
(functable[0].wscfunc)();

你需要一个对象来调用成员函数。在你的情况下，CMyApp类型的对象。

Tom。

You need an object to call a member function on. In your case, an
object of type CMyApp.

Tom.

谢谢 - 我找到了其他修复 - 将方法声明为静态。

Thanks - I found the "other" fix too - to declare the methods as static.

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