[Kde-pim] Akonadi item.h + clang

[Patrick Ohly]

Hello!

I'm currently compiling Dinesh's SyncEvolution Akonadi backend. I'm
using clang++ 2.9 instead of g++ and noticed that the following trick in
item.h doesn't work with clang++:

template <typename T>
void Item::setPayload( T* p )
{
  p.You_MUST_NOT_use_a_pointer_as_payload;
}

The reason is that clang++, in contrast to g++, already does error
checking on the template while compiling the template, not when it is
instantiated.

Therefore I get a compiler error about the member access in a pointer.

This patch fixes the issue while still triggering a compiler error when
Item::setPayload is used incorrectly:

*** item.h.orig	2011-04-13 10:12:23.000000000 +0200
--- item.h	2011-04-13 10:18:45.000000000 +0200
***************
*** 426,432 ****
  template <typename T>
  void Item::setPayload( T* p )
  {
!   p.You_MUST_NOT_use_a_pointer_as_payload;
  }
  
  template <typename T>
--- 426,432 ----
  template <typename T>
  void Item::setPayload( T* p )
  {
!   p->You_MUST_NOT_use_a_pointer_as_payload();
  }
  
  template <typename T>

-- 
Bye, Patrick Ohly
--  
Patrick.Ohly at gmx.de
http://www.estamos.de/


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