void construct_value()const
{
if(!value_cted()){
/* value_ptr must be ==0, oherwise copy_value would have been called */
key_type k(*key_ptr());
key_ptr()->~key_type();
value_ptr= /* guarantees key won't be re-dted at ~rep_type if the */
static_cast<value_type*>(spc_ptr())+1; /* next statement throws */
value_ptr=new(spc_ptr())value_type(k);
}
}
void construct_value()const
{
if(!value_cted()){
/* value_ptr must be ==0, oherwise copy_value would have been called */
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
key_type k(std::move(*key_ptr()));
#else
key_type k(*key_ptr());
#endif
key_ptr()->~key_type();
value_ptr= /* guarantees key won't be re-dted at ~rep_type if the */
static_cast<value_type*>(spc_ptr())+1; /* next statement throws */
value_ptr=new(spc_ptr())value_type(k);
}
}
operator const value_type&()const
{
/* This is always called after construct_value() or copy_value(),
* so we access spc directly rather than through value_ptr to
* save us an indirection.
*/
return *static_cast<value_type*>(spc_ptr());
}
bool value_cted()const{return value_ptr==spc_ptr();}
void construct_value()const
{
if(!value_ptr)value_ptr=new(spc_ptr())value_type(key);
}
void copy_value()const
{
if(!value_cted())value_ptr=new(spc_ptr())value_type(*value_ptr);
}
void move_value()const
{
if(!value_cted())value_ptr=
new(spc_ptr())value_type(std::move(const_cast<value_type&>(*value_ptr)));
}