c++/3332: friend function declaration in a class in a namespace causes error

[aroach at stoic dot electriceyeball dot com]

>Number:         3332
>Category:       c++
>Synopsis:       friend function declaration in a class in a namespace causes error
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Thu Jun 21 08:46:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Anthony Roach
>Release:        3.0
>Organization:
>Environment:
System: Linux stoic 2.2.19 #1 Thu Apr 5 15:18:02 EST 2001 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc-3.0/configure --prefix=/usr/local/opt/gcc-3.0
>Description:
Implicitly declaring a function through a friend declaration in a class
definition where the class and the function are members of the same
namespace doesn't compile.
>How-To-Repeat:

source that produces the bug:
// BEGIN: friendBug.cpp
namespace N
{
	class A;
}

class N::A
{
	friend void func(void);
};

void N::func(void)
{

}

int main()
{
	return 0;
}
// END: friendBug.cpp

Compile with: gcc friendBug.cpp

gcc output:
friendBug.cpp:13: `void N::func()' should have been declared inside `N'

>Fix:
Workaround:
// BEGIN: friendFixed.cpp
namespace N
{
	class A;
	void func(void);
}

class N::A
{
	friend void func(void);
};

void N::func(void)
{

}

int main()
{
	return 0;
}
// END: friendFixed.cpp
>Release-Note:
>Audit-Trail:
>Unformatted: