This is the mail archive of the libstdc++@gcc.gnu.org mailing list for the libstdc++ project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [v3] PATCH: PR 20599 (variadic templates, take two) (4/4)


Gennaro Prota wrote:
On Wed, 20 Sep 2006 20:15:29 +0200, Paolo Carlini <pcarlini@suse.de>
wrote:

Douglas Gregor wrote:

This is part 4 of 4. It contains changes to libstdc++'s TR1
implementation to make full use of variadic templates, eliminating
all of the preprocessor metaprogramming that we're using now.

+ // Define a large number of placeholders. There is no way to + // simplify this with variadic templates, because we're introducing + // unique names for each. + namespace placeholders { namespace { + _Placeholder<1> _1; + _Placeholder<2> _2; + _Placeholder<3> _3; + ... + } }

Hi,


is this in an included file? You don't want to open an unnamed
namespace there.

Yep, TR1/WP calls for


namespace placeholders
{
   extern _Placeholder<1> _1;
   // ...
}


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]