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add error policy

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git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@485 7ec92016-0320-0410-acc4-a06ded1c099a
This commit is contained in:
syntheticpp 2006-01-16 19:48:23 +00:00
parent 4703b740b7
commit 081c3fb31f
1 changed files with 39 additions and 7 deletions
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46
include/loki/Pimpl.h
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@ -14,7 +14,6 @@
#include <loki/TypeTraits.h> #include <loki/TypeTraits.h>
// $Header$
#ifndef LOKI_INHERITED_PIMPL_NAME #ifndef LOKI_INHERITED_PIMPL_NAME
#define LOKI_INHERITED_PIMPL_NAME d #define LOKI_INHERITED_PIMPL_NAME d
@ -33,6 +32,8 @@ namespace Loki
struct Impl; struct Impl;
///////////////////// /////////////////////
// creation policies // creation policies
///////////////////// /////////////////////
@ -61,6 +62,31 @@ namespace Loki
{} {}
}; };
/////////////////////
// error handling
/////////////////////
template<class T>
struct ExceptionOnPimplError
{
struct Exception : public std::exception
{
const char* what() const throw() { return "error in loki/Pimpl.h"; }
};
static void PimplError()
{
throw Exception();
}
};
template<class T>
struct IgnorPimplError
{
static void PimplError()
{}
};
///////////////////// /////////////////////
// Helper class AutoPtrHolder to manage pimpl lifetime // Helper class AutoPtrHolder to manage pimpl lifetime
@ -98,9 +124,10 @@ namespace Loki
< <
class Impl, class Impl,
class Ptr, class Ptr,
template<class> class Del template<class> class Del,
template<class> class ErrorPolicy = ExceptionOnPimplError
> >
struct AutoPtrHolderChecked //: AutoPtrHolder<Impl,Ptr,Del> struct AutoPtrHolderChecked
{ {
static bool init_; static bool init_;
@ -118,9 +145,10 @@ namespace Loki
template<class T> template<class T>
operator T&() operator T&()
{ {
if(!init_)
// if this throws change the declaration order // if this throws change the declaration order
throw 1; // of the DeclaredRimpl construct
if(!init_)
ErrorPolicy<T>::PimplError();
Create(); Create();
return *ptr; return *ptr;
} }
@ -138,9 +166,10 @@ namespace Loki
< <
class Impl, class Impl,
class Ptr, class Ptr,
template<class> class Del template<class> class Del,
template<class> class Err
> >
bool AutoPtrHolderChecked<Impl,Ptr,Del>::init_ = false; bool AutoPtrHolderChecked<Impl,Ptr,Del,Err>::init_ = false;
template<class T> template<class T>
@ -335,6 +364,9 @@ namespace Loki
#endif #endif
// $Log$ // $Log$
// Revision 1.7 2006/01/16 19:48:23 syntheticpp
// add error policy
//
// Revision 1.6 2006/01/16 19:05:09 rich_sposato // Revision 1.6 2006/01/16 19:05:09 rich_sposato
// Added cvs keywords. // Added cvs keywords.
// //