* Anonymous struct
@ 2010-04-07 14:20 John S. Fine
2010-04-07 15:46 ` Ian Lance Taylor
0 siblings, 1 reply; 2+ messages in thread
From: John S. Fine @ 2010-04-07 14:20 UTC (permalink / raw)
To: GCC Help Mailing List
Can someone with a good understanding of the C++ standard tell me if
this program is legal C++
#include <iostream>
int x = 1;
int main(int argc, char** argv)
{
struct {
int operator()( int y ) { return x + y; }
} fun;
std::cout << fun( 7 ) << std::endl;
return 0;
}
It compiles and runs with gcc 4.4.1. I have done similar things in
other situations many times, so I assumed that it was valid.
But another compiler (not a version of GCC) reports:
error C2627: member function defined in unnamed class
I hope that other compiler is just wrong. But I'd like someone with a
better understanding of the standard to comment.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Anonymous struct
2010-04-07 14:20 Anonymous struct John S. Fine
@ 2010-04-07 15:46 ` Ian Lance Taylor
0 siblings, 0 replies; 2+ messages in thread
From: Ian Lance Taylor @ 2010-04-07 15:46 UTC (permalink / raw)
To: John S. Fine; +Cc: GCC Help Mailing List
"John S. Fine" <johnsfine@verizon.net> writes:
> Can someone with a good understanding of the C++ standard tell me if
> this program is legal C++
>
> #include <iostream>
> int x = 1;
> int main(int argc, char** argv)
> {
> struct {
> int operator()( int y ) { return x + y; }
> } fun;
>
> std::cout << fun( 7 ) << std::endl;
> return 0;
> }
>
> It compiles and runs with gcc 4.4.1. I have done similar things in
> other situations many times, so I assumed that it was valid.
>
> But another compiler (not a version of GCC) reports:
>
> error C2627: member function defined in unnamed class
>
> I hope that other compiler is just wrong. But I'd like someone with a
> better understanding of the standard to comment.
You are not permitted to define a member function in an anonymous
union, but I don't see any such restriction for an anonymous class or
struct.
Ian
^ permalink raw reply [flat|nested] 2+ messages in thread
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