C++, "canceling a construction"

Hi /prog/

My is simple, but perhaps not so frequent.

How should I stop a construction of an object (c++)?

Basically I have a class with some data members which must fulfill some requirements. Say we initialize these data members upon construction, if the supplied values were erroneous then I guess I want to stop construction and throw an error. Is this the right idea? How do I "cancel the construction"?

Help much appreciated :)

>>44
I just want to doubly highlight the stupidity of this:

the best way to find the cause of a bug is to just call abort()? May I ask how, the fuck, do you expect to gather debugging information after that?
You can't gather debug information *AT ALL* from exceptions. They don't even have a stack trace. Sepples exceptions are *entirely useless* for debugging.

On the other hand, you can replace abort() to take __LINE__ and __FILE__, and you'll know exactly what's wrong locally (and there are platform-specific tools to run through the linked-list on the stack; if you include a debug symbol table for your QA builds you can easily get a full stack trace out of it). This also works in and across C code, not just sepples bullshit.

And most importantly, debuggers halt on SIGABRT, so you can easily investigate the call stack interactively (as opposed to your app dying due to an uncaught (or worse, caught with ...) exception, and setting up your debugger to catch specific exception types, and trying to replicate it and stepping through all the ones you aren't interested in...)