Lambda type names

Lambda type names

[Mario Demontis]

Hello
Is there a way to make gcc add more info for each lambda defined in the
same function?
E.g.:

auto l1 = [x = 5](int a){return x+a;};
auto l2 = [y = 6](int a){return y+1;};

If I want to wrap them into the same wrapper template class:

template<typename T>
struct Wrap{
   T w;
};

They would end up with the same name in gdb (e.g.:
function_name()::<lambda(int)>), causing an overlap in type
definitions.

Could it be possible to add more info (in the linking symbol a counter
is added, while clang adds the filename and line of definition)?


Thanks

Mario

Re: Lambda type names

[Jonathan Wakely]

On Fri, 12 Nov 2021 at 12:21, Mario Demontis wrote:
>
> Hello
> Is there a way to make gcc add more info for each lambda defined in the
> same function?

No.


> E.g.:
>
> auto l1 = [x = 5](int a){return x+a;};
> auto l2 = [y = 6](int a){return y+1;};
>
> If I want to wrap them into the same wrapper template class:
>
> template<typename T>
> struct Wrap{
>    T w;
> };
>
> They would end up with the same name in gdb (e.g.:
> function_name()::<lambda(int)>), causing an overlap in type
> definitions.

And their python gdb.Type objects are equal too.

> Could it be possible to add more info (in the linking symbol a counter
> is added, while clang adds the filename and line of definition)?

Please file a bug with the testcase from your first email.