Usage of class forward declarations;

Why is the code below giving an error in VC++ 8? Why would the
compiler need to see the definition of Foo to compile:

class Foo;
Foo& g();
void f()
{
g(); // error: use of undefined type 'Foo'
}

?

Thanks

On 2008-08-29 16:33, Belebele wrote:

Quote:

Why is the code below giving an error in VC++ 8? Why would the
compiler need to see the definition of Foo to compile:
>
class Foo;
Foo& g();
void f()
{
g(); // error: use of undefined type 'Foo'
}

Because g() returns an object of type Foo, which means that the compiler
needs to know how to create such an object.

--
Erik Wikström

Belebele <beluchin@gmail.comkirjutas:

Quote:

Why is the code below giving an error in VC++ 8? Why would the
compiler need to see the definition of Foo to compile:
>
class Foo;
Foo& g();
void f()
{
g(); // error: use of undefined type 'Foo'
}
>

This compiles with gcc and Comeau online, so I guess this is a VC++ bug.

regards
Paavo

Erik Wikström wrote:

Quote:

On 2008-08-29 16:33, Belebele wrote:

Quote:

>Why is the code below giving an error in VC++ 8? Why would the
>compiler need to see the definition of Foo to compile:
>>
>class Foo;
>Foo& g();
>void f()
>{
> g(); // error: use of undefined type 'Foo'
>}

>
Because g() returns an object of type Foo, which means that the compiler
needs to know how to create such an object.

Actually it returns a reference of type Foo.

Usage of class forward declarations;

re: Usage of class forward declarations;

re: Usage of class forward declarations;

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