Wt

wt-3.3.3 Transaction::~Transaction() throws exctiption.

1, never throw an exception from a destructor (Meyers96: 58-61), see http://www.gotw.ca/gotw/047.htm

2, when std::uncaught_exception() is true, it maybe throw a NEW exception:

if(impl*->needsRollback* || std::uncaught_exception())

{

try

{

rollback();

}

catch(std::exception&)

{

release();

throw;//std::uncaught_exception() == true, goto here.

}

}

3, follow The Right Solution of GotW #47, Transaction::~Transaction() should call rollback() only if need it.

Let the user call commit(), so it can throw a exception to report error.