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replaced pointer-dummy parameters with Type2Type-parameters

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git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@104 7ec92016-0320-0410-acc4-a06ded1c099a
This commit is contained in:
humesikkins 2003-02-27 15:53:45 +00:00
parent 16c65edb0e
commit dd2b5192fa
1 changed files with 9 additions and 5 deletions
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14
MSVC/1200/AbstractFactory.h
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@ -13,7 +13,10 @@
// without express or implied warranty. // without express or implied warranty.
//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////
// Last update: Oct 24, 2002 // Last update: Feb 20, 2003
// replaced pointer-dummy parameters with Type2Type-parameters.
// See readme.txt (notes: C) if you don't know why the dummy parameters are needed
//
// replaced all template template parameters with 'normal' parameters // replaced all template template parameters with 'normal' parameters
// For each Factory-Unit there is now a wrapper-class (non template class) // For each Factory-Unit there is now a wrapper-class (non template class)
// containing a nested template class called In which // containing a nested template class called In which
@ -32,7 +35,7 @@
#include <cassert> #include <cassert>
#define ETAS_HELPER(Type) ((Type*)0) #define ETAS_HELPER(Type) (::Loki::Type2Type<Type>())
namespace Loki namespace Loki
{ {
@ -65,12 +68,12 @@ namespace Loki
//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////
// VC 6.0 changes: // VC 6.0 changes:
// Because the VC 6.0 does not support explicit template argument specification (14.8.1) // Because the VC 6.0 does not support explicit template argument specification (14.8.1)
// the member-function Create takes a dummy argument of type T* whose sole // the member-function Create takes a dummy argument of type Type2Type<T> whose sole
// responsibility is to help the compiler in deducing the type of T. // responsibility is to help the compiler in deducing the type of T.
// Using this port the call: // Using this port the call:
// ConcProduct* p = aFactory.Create<ConcProduct>(); // ConcProduct* p = aFactory.Create<ConcProduct>();
// therefore becomes: // therefore becomes:
// ConcProduct* p = aFactory.Create((ConcProduct*)0); // ConcProduct* p = aFactory.Create(Type2Type<ConcProduct>());
template template
< <
@ -82,7 +85,7 @@ namespace Loki
public: public:
typedef TList ProductList; typedef TList ProductList;
template <class T> T* Create(T* DeduceHelper) template <class T> T* Create(Type2Type<T>)
{ {
ApplyInnerType<Unit, T>::type& unit = *this; ApplyInnerType<Unit, T>::type& unit = *this;
return unit.DoCreate(Type2Type<T>()); return unit.DoCreate(Type2Type<T>());
@ -212,6 +215,7 @@ namespace Loki
// Change log: // Change log:
// June 20, 2001: ported by Nick Thurn to gcc 2.95.3. Kudos, Nick!!! // June 20, 2001: ported by Nick Thurn to gcc 2.95.3. Kudos, Nick!!!
// Oct 24, 2002: ported by Benjamin Kaufmann to MSVC 6.0 // Oct 24, 2002: ported by Benjamin Kaufmann to MSVC 6.0
// Feb 20, 2003: replaced pointer-dummy parameters with Type2Type-parameters. B.K.
//////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////
#endif // ABSTRACTFACTORY_INC_ #endif // ABSTRACTFACTORY_INC_