Re: Win32 Defines & C++

Re: Win32 Defines & C++

[Nirmal Prasad]

John F.Kolen Wrote :
>What about
>
>#include <winstuff>
>
>#undef GetNextWindow
>...
>  void GetNextWindow(...
>
>#define GetNextWindow(h,c)    GetWindow(h,c)        /* somewhere in some
>
and Larry Hall Wrote :
>Why don't you just check to see if GetNextWindow() is defined and undefine
>it if it is in your code? This should work and requires only minor code
>changes...

hi,

first and formemost "thanks for the suggestion" but the problem with this
method is that if u consider the implementation of the method in the class
(this is usually the case for wrapper classes) i.e
void test::GetNextWindow(uint c)
{
    //.. some checks...
    ::GetNextWindow(internal_handle,c);
    //... some post processing for error handling
}

so now we run into a problem that the original GetNextWindow(..) has now
undefined. Well i found that the "inline" solution would work better than
#undef unless i am missing something.

Regards

Nirmal Prasad R.


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Re: Win32 Defines & C++

[Nirmal Prasad]

John F.Kolen Wrote :
>What about
>
>#include <winstuff>
>
>#undef GetNextWindow
>...
>  void GetNextWindow(...
>
>#define GetNextWindow(h,c)    GetWindow(h,c)        /* somewhere in some
>
and Larry Hall Wrote :
>Why don't you just check to see if GetNextWindow() is defined and undefine
>it if it is in your code? This should work and requires only minor code
>changes...

hi,

first and formemost "thanks for the suggestion" but the problem with this
method is that if u consider the implementation of the method in the class
(this is usually the case for wrapper classes) i.e
void test::GetNextWindow(uint c)
{
    //.. some checks...
    ::GetNextWindow(internal_handle,c);
    //... some post processing for error handling
}

so now we run into a problem that the original GetNextWindow(..) has now
undefined. Well i found that the "inline" solution would work better than
#undef unless i am missing something.

Regards

Nirmal Prasad R.


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Re: Win32 Defines & C++

[Mumit Khan]

On Wed, 24 Mar 1999, Nirmal Prasad wrote:

> This is not a cygwin related query,bug or feature request but if someone can
> help it will be great b'cos i am getting this problem in some code that i
> have while compiling under cygwin.

Neither is this a GCC problem, since you'll get the same result with MSVC
or any other C++ compiler!

> The problem i am facing is that i have some c++ class that has a member
> function which is the same as a win32 define (e.g. GetNextWindow). The
> problem is that the pre-processor substitues this and the compiler complains
> that there is something wrong. One of the solutions i thought of getting
> around this is to make the #define'd macro to an inline function and the
> code would then compile but this would be tedious if its a lot of macros . I
> was wondering if there is any other elegant solution such that i dont have
> to change any code.????

The problem of these macro definitions in Win32 API headers causes lots
of problems even in standard-conformant code; the only (obvious) suggestion 
I can give is not to name member functions with the same name as a win32 
API function (or just rename it when you find one that clashes).

The API headers were designed by folks who think C is the only language,
and even botches that badly.

Years ago, I remember putting together a set of platform specific
"undef.h" files that I would include after the system includes to avoid
this mess, but that really isn't the right solution. However, since you
want to avoid code changes, this may be a solution for you. 

Regards,
Mumit



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Win32 Defines & C++

[Nirmal Prasad]

hi there,

This is not a cygwin related query,bug or feature request but if someone can
help it will be great b'cos i am getting this problem in some code that i
have while compiling under cygwin.

The problem i am facing is that i have some c++ class that has a member
function which is the same as a win32 define (e.g. GetNextWindow). The
problem is that the pre-processor substitues this and the compiler complains
that there is something wrong. One of the solutions i thought of getting
around this is to make the #define'd macro to an inline function and the
code would then compile but this would be tedious if its a lot of macros . I
was wondering if there is any other elegant solution such that i dont have
to change any code.????

Thanks in advance

Regards

Nirmal Prasad R.

e.g.
#define GetNextWindow(h,c)    GetWindow(h,c)        /* somewhere in some
win32 header */

//.. This is in my file
class test
{
    public:
            ... some members
           void GetNextWindow(uint c);                //<- get an error here
as "GetNextWindow" called with 1 argument only
};


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Win32 Defines & C++

[Nirmal Prasad]

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Re: Win32 Defines & C++

[Mumit Khan]

On Wed, 24 Mar 1999, Nirmal Prasad wrote:

> This is not a cygwin related query,bug or feature request but if someone can
> help it will be great b'cos i am getting this problem in some code that i
> have while compiling under cygwin.

Neither is this a GCC problem, since you'll get the same result with MSVC
or any other C++ compiler!

> The problem i am facing is that i have some c++ class that has a member
> function which is the same as a win32 define (e.g. GetNextWindow). The
> problem is that the pre-processor substitues this and the compiler complains
> that there is something wrong. One of the solutions i thought of getting
> around this is to make the #define'd macro to an inline function and the
> code would then compile but this would be tedious if its a lot of macros . I
> was wondering if there is any other elegant solution such that i dont have
> to change any code.????

The problem of these macro definitions in Win32 API headers causes lots
of problems even in standard-conformant code; the only (obvious) suggestion 
I can give is not to name member functions with the same name as a win32 
API function (or just rename it when you find one that clashes).

The API headers were designed by folks who think C is the only language,
and even botches that badly.

Years ago, I remember putting together a set of platform specific
"undef.h" files that I would include after the system includes to avoid
this mess, but that really isn't the right solution. However, since you
want to avoid code changes, this may be a solution for you. 

Regards,
Mumit



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Win32 Defines & C++

[Nirmal Prasad]

hi there,

This is not a cygwin related query,bug or feature request but if someone can
help it will be great b'cos i am getting this problem in some code that i
have while compiling under cygwin.

The problem i am facing is that i have some c++ class that has a member
function which is the same as a win32 define (e.g. GetNextWindow). The
problem is that the pre-processor substitues this and the compiler complains
that there is something wrong. One of the solutions i thought of getting
around this is to make the #define'd macro to an inline function and the
code would then compile but this would be tedious if its a lot of macros . I
was wondering if there is any other elegant solution such that i dont have
to change any code.????

Thanks in advance

Regards

Nirmal Prasad R.

e.g.
#define GetNextWindow(h,c)    GetWindow(h,c)        /* somewhere in some
win32 header */

//.. This is in my file
class test
{
    public:
            ... some members
           void GetNextWindow(uint c);                //<- get an error here
as "GetNextWindow" called with 1 argument only
};


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Win32 Defines & C++

[Nirmal Prasad]

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