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Old 08-26-2004, 05:23 AM   #1
Registered: Aug 2004
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Question Problems when porting code from C++ under visual studio 6 to linux.

Hello everyone,
I have a problem with some code in C++.
when i compile it under visual studio 6 everything is ok.
but when i compile it with gcc... well....
what i do is define a function pointer the following way:
i have a class called CCollect that collects function pointers.
the following line is inside that class:
    typedef void (CCollect::*TFunction)()
now what i want to do is to take a funciton
void foo(CSomeClass* ptr, int nParam)
and i try to assign this function's address in a variable of type TFunction;

CCollect::TFunction pFunc = (CCollect::TFunction)foo
this works just fine in visual studio, but gcc simply gives me the following error:
"no matches converting function 'foo' to type 'void class CCollect::*'().
candidates are: void foo(CSomeClass* ptr, int nParam)"

any idea why that happens?

Old 08-26-2004, 05:55 AM   #2
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hi there
i have been using 'g++' instead of 'gcc' to compile C++ programs in linux and they have been working fine

Old 08-26-2004, 06:05 AM   #3
Registered: Aug 2004
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Thanks for the reply.
i am using g++ already since i am compiling c++ code.
tried different versions (2.96, 3.1) of the compiler, nothing changed that error.
Old 08-26-2004, 07:19 AM   #4
Registered: Aug 2004
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Ok problem solved.
problem was foo was a part of a class CFooClass.
and the code used several macros to make the conversions.
when i looked at the code after preprocessing, i saw that it wrote foo instead of CFooClass::foo, so it didn't recognize the function.
i wonder how it worked in visual studio though... probably the compiler assumed the right context or something...
thanks for the help.


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